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CVE-2026-74446

HIGH 7.8 ALL-YEARS

Published 2026-08-15 · Last modified 2026-10-16 · Linux · NVD: Received

In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: hold event_mutex while checkpointing CRIU events kfd_criu_checkpoint_events() counts the entries in p->event_idr via kfd_get_num_events(), allocates an array sized to that count, and then walks the same IDR to fill it. Neither the count nor the walk holds p->event_mutex. The CRIU checkpoint caller holds only p->mutex. Event create and destroy (kfd_event_create()/kfd_event_destroy()) take p->event_mutex and do not take p->mutex, so a second thread in the same process can insert or remove events between the count and the walk. If an event is inserted, the walk iterates more entries than were counted and writes past the end of the ev_privs allocation; if an event is removed, the walk dereferences an entry that is being freed. Hold p->event_mutex across the count and the walk so both observe a consistent view of p->event_idr. The lock is released before copy_to_user(), which only touches the local buffer. The caller already holds p->mutex and the create/destroy paths never take p->mutex, so the p->mutex -> p->event_mutex order is not inverted and no deadlock is introduced. (cherry picked from commit ff57e223ab105795b05d3ef3f3c35a5a441bcbaa)

ELEVATED IMPACT

Severe if exploited (CVSS 7.8), but no confirmed exploitation. Patch on a normal cadence.

Exploitation likelihood

0.1%chance of exploitation in 30 days · 3rd percentile

○ In CISA KEV○ Catalogued PoC◆ SSVC: exploitation none, automatable no

Impact if exploited

7.8CVSS 3.1 · HIGH · CNA

  • ConfidentialityHigh
  • IntegrityHigh
  • AvailabilityHigh

What an attacker needs

  • ⚠Access: Requires local access to the host
  • ⚠Privileges: Requires a low-privilege account
  • ✓User interaction: No user interaction needed
  • ✓Complexity: No special conditions — reliably repeatable

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

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Tracked sources are checked weekly for the full archive, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Affected

Vendors Linux

Products Linux

Weakness (CWE)

Not classified.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References and research data (JSON)

Vendor product assessments

Showing 32 of 274 vendor product statements; 242 omitted. Read the full vendor advisory.

  • kernel as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel

    • workaround: To mitigate this vulnerability, prevent the amdgpu kernel module from loading on systems where AMD GPU compute or display hardware is not required. 1. Blacklist the module by executing the following command as root: # echo "install amdgpu /bin/true" > /etc/modprobe.d/disable-amdgpu.conf 2. If the module is currently loaded into kernel memory, a system reboot is required to fully unload it, or attempt to unload it manually: # rmmod amdgpu Warning: Unloading the kernel module or rebooting the host will interrupt running services and terminate graphical sessions. Caveat: Disabling the amdgpu driver prevents hardware graphics acceleration and compute functionality on systems equipped with AMD Radeon or Instinct GPUs. Ensure alternative console access is available.
    • none available: Affected
    Red Hat · CVE-2026-74446 · Updated 2026-09-30T16:54:04+00:00
  • kernel-abi-stablelists as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-abi-stablelists

    • workaround: To mitigate this vulnerability, prevent the amdgpu kernel module from loading on systems where AMD GPU compute or display hardware is not required. 1. Blacklist the module by executing the following command as root: # echo "install amdgpu /bin/true" > /etc/modprobe.d/disable-amdgpu.conf 2. If the module is currently loaded into kernel memory, a system reboot is required to fully unload it, or attempt to unload it manually: # rmmod amdgpu Warning: Unloading the kernel module or rebooting the host will interrupt running services and terminate graphical sessions. Caveat: Disabling the amdgpu driver prevents hardware graphics acceleration and compute functionality on systems equipped with AMD Radeon or Instinct GPUs. Ensure alternative console access is available.
    • none available: Affected
    Red Hat · CVE-2026-74446 · Updated 2026-09-30T16:54:04+00:00
  • kernel-modules-extra-matched as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-modules-extra-matched

    • workaround: To mitigate this vulnerability, prevent the amdgpu kernel module from loading on systems where AMD GPU compute or display hardware is not required. 1. Blacklist the module by executing the following command as root: # echo "install amdgpu /bin/true" > /etc/modprobe.d/disable-amdgpu.conf 2. If the module is currently loaded into kernel memory, a system reboot is required to fully unload it, or attempt to unload it manually: # rmmod amdgpu Warning: Unloading the kernel module or rebooting the host will interrupt running services and terminate graphical sessions. Caveat: Disabling the amdgpu driver prevents hardware graphics acceleration and compute functionality on systems equipped with AMD Radeon or Instinct GPUs. Ensure alternative console access is available.
    • none available: Affected
    Red Hat · CVE-2026-74446 · Updated 2026-09-30T16:54:04+00:00
  • kernel-rt-debug as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-rt-debug

    • workaround: To mitigate this vulnerability, prevent the amdgpu kernel module from loading on systems where AMD GPU compute or display hardware is not required. 1. Blacklist the module by executing the following command as root: # echo "install amdgpu /bin/true" > /etc/modprobe.d/disable-amdgpu.conf 2. If the module is currently loaded into kernel memory, a system reboot is required to fully unload it, or attempt to unload it manually: # rmmod amdgpu Warning: Unloading the kernel module or rebooting the host will interrupt running services and terminate graphical sessions. Caveat: Disabling the amdgpu driver prevents hardware graphics acceleration and compute functionality on systems equipped with AMD Radeon or Instinct GPUs. Ensure alternative console access is available.
    • none available: Affected
    Red Hat · CVE-2026-74446 · Updated 2026-09-30T16:54:04+00:00
  • kernel-uki-virt-addons as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-uki-virt-addons

    • workaround: To mitigate this vulnerability, prevent the amdgpu kernel module from loading on systems where AMD GPU compute or display hardware is not required. 1. Blacklist the module by executing the following command as root: # echo "install amdgpu /bin/true" > /etc/modprobe.d/disable-amdgpu.conf 2. If the module is currently loaded into kernel memory, a system reboot is required to fully unload it, or attempt to unload it manually: # rmmod amdgpu Warning: Unloading the kernel module or rebooting the host will interrupt running services and terminate graphical sessions. Caveat: Disabling the amdgpu driver prevents hardware graphics acceleration and compute functionality on systems equipped with AMD Radeon or Instinct GPUs. Ensure alternative console access is available.
    • none available: Affected
    Red Hat · CVE-2026-74446 · Updated 2026-09-30T16:54:04+00:00
  • kernel as a component of Red Hat Enterprise Linux 8 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel

    • workaround: To mitigate this vulnerability, prevent the amdgpu kernel module from loading on systems where AMD GPU compute or display hardware is not required. 1. Blacklist the module by executing the following command as root: # echo "install amdgpu /bin/true" > /etc/modprobe.d/disable-amdgpu.conf 2. If the module is currently loaded into kernel memory, a system reboot is required to fully unload it, or attempt to unload it manually: # rmmod amdgpu Warning: Unloading the kernel module or rebooting the host will interrupt running services and terminate graphical sessions. Caveat: Disabling the amdgpu driver prevents hardware graphics acceleration and compute functionality on systems equipped with AMD Radeon or Instinct GPUs. Ensure alternative console access is available.
    • none available: Affected
    Red Hat · CVE-2026-74446 · Updated 2026-09-30T16:54:04+00:00
  • kernel-modules as a component of Red Hat Enterprise Linux 8 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-modules

    • workaround: To mitigate this vulnerability, prevent the amdgpu kernel module from loading on systems where AMD GPU compute or display hardware is not required. 1. Blacklist the module by executing the following command as root: # echo "install amdgpu /bin/true" > /etc/modprobe.d/disable-amdgpu.conf 2. If the module is currently loaded into kernel memory, a system reboot is required to fully unload it, or attempt to unload it manually: # rmmod amdgpu Warning: Unloading the kernel module or rebooting the host will interrupt running services and terminate graphical sessions. Caveat: Disabling the amdgpu driver prevents hardware graphics acceleration and compute functionality on systems equipped with AMD Radeon or Instinct GPUs. Ensure alternative console access is available.
    • none available: Affected
    Red Hat · CVE-2026-74446 · Updated 2026-09-30T16:54:04+00:00
  • kernel-rt-modules-internal as a component of Red Hat Enterprise Linux 8 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-rt-modules-internal

    • workaround: To mitigate this vulnerability, prevent the amdgpu kernel module from loading on systems where AMD GPU compute or display hardware is not required. 1. Blacklist the module by executing the following command as root: # echo "install amdgpu /bin/true" > /etc/modprobe.d/disable-amdgpu.conf 2. If the module is currently loaded into kernel memory, a system reboot is required to fully unload it, or attempt to unload it manually: # rmmod amdgpu Warning: Unloading the kernel module or rebooting the host will interrupt running services and terminate graphical sessions. Caveat: Disabling the amdgpu driver prevents hardware graphics acceleration and compute functionality on systems equipped with AMD Radeon or Instinct GPUs. Ensure alternative console access is available.
    • none available: Affected
    Red Hat · CVE-2026-74446 · Updated 2026-09-30T16:54:04+00:00
  • python3-perf as a component of Red Hat Enterprise Linux 8 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/python3-perf

    • workaround: To mitigate this vulnerability, prevent the amdgpu kernel module from loading on systems where AMD GPU compute or display hardware is not required. 1. Blacklist the module by executing the following command as root: # echo "install amdgpu /bin/true" > /etc/modprobe.d/disable-amdgpu.conf 2. If the module is currently loaded into kernel memory, a system reboot is required to fully unload it, or attempt to unload it manually: # rmmod amdgpu Warning: Unloading the kernel module or rebooting the host will interrupt running services and terminate graphical sessions. Caveat: Disabling the amdgpu driver prevents hardware graphics acceleration and compute functionality on systems equipped with AMD Radeon or Instinct GPUs. Ensure alternative console access is available.
    • none available: Affected
    Red Hat · CVE-2026-74446 · Updated 2026-09-30T16:54:04+00:00
  • kernel-64k-modules as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-64k-modules

    • workaround: To mitigate this vulnerability, prevent the amdgpu kernel module from loading on systems where AMD GPU compute or display hardware is not required. 1. Blacklist the module by executing the following command as root: # echo "install amdgpu /bin/true" > /etc/modprobe.d/disable-amdgpu.conf 2. If the module is currently loaded into kernel memory, a system reboot is required to fully unload it, or attempt to unload it manually: # rmmod amdgpu Warning: Unloading the kernel module or rebooting the host will interrupt running services and terminate graphical sessions. Caveat: Disabling the amdgpu driver prevents hardware graphics acceleration and compute functionality on systems equipped with AMD Radeon or Instinct GPUs. Ensure alternative console access is available.
    • none available: Affected
    Red Hat · CVE-2026-74446 · Updated 2026-09-30T16:54:04+00:00
  • kernel-debug-modules-internal as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-debug-modules-internal

    • workaround: To mitigate this vulnerability, prevent the amdgpu kernel module from loading on systems where AMD GPU compute or display hardware is not required. 1. Blacklist the module by executing the following command as root: # echo "install amdgpu /bin/true" > /etc/modprobe.d/disable-amdgpu.conf 2. If the module is currently loaded into kernel memory, a system reboot is required to fully unload it, or attempt to unload it manually: # rmmod amdgpu Warning: Unloading the kernel module or rebooting the host will interrupt running services and terminate graphical sessions. Caveat: Disabling the amdgpu driver prevents hardware graphics acceleration and compute functionality on systems equipped with AMD Radeon or Instinct GPUs. Ensure alternative console access is available.
    • none available: Affected
    Red Hat · CVE-2026-74446 · Updated 2026-09-30T16:54:04+00:00
  • kernel-rt-64k as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-rt-64k

    • workaround: To mitigate this vulnerability, prevent the amdgpu kernel module from loading on systems where AMD GPU compute or display hardware is not required. 1. Blacklist the module by executing the following command as root: # echo "install amdgpu /bin/true" > /etc/modprobe.d/disable-amdgpu.conf 2. If the module is currently loaded into kernel memory, a system reboot is required to fully unload it, or attempt to unload it manually: # rmmod amdgpu Warning: Unloading the kernel module or rebooting the host will interrupt running services and terminate graphical sessions. Caveat: Disabling the amdgpu driver prevents hardware graphics acceleration and compute functionality on systems equipped with AMD Radeon or Instinct GPUs. Ensure alternative console access is available.
    • none available: Affected
    Red Hat · CVE-2026-74446 · Updated 2026-09-30T16:54:04+00:00
  • kernel-rt-64k-modules-core as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-rt-64k-modules-core

    • workaround: To mitigate this vulnerability, prevent the amdgpu kernel module from loading on systems where AMD GPU compute or display hardware is not required. 1. Blacklist the module by executing the following command as root: # echo "install amdgpu /bin/true" > /etc/modprobe.d/disable-amdgpu.conf 2. If the module is currently loaded into kernel memory, a system reboot is required to fully unload it, or attempt to unload it manually: # rmmod amdgpu Warning: Unloading the kernel module or rebooting the host will interrupt running services and terminate graphical sessions. Caveat: Disabling the amdgpu driver prevents hardware graphics acceleration and compute functionality on systems equipped with AMD Radeon or Instinct GPUs. Ensure alternative console access is available.
    • none available: Affected
    Red Hat · CVE-2026-74446 · Updated 2026-09-30T16:54:04+00:00
  • kernel-rt-devel as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-rt-devel

    • workaround: To mitigate this vulnerability, prevent the amdgpu kernel module from loading on systems where AMD GPU compute or display hardware is not required. 1. Blacklist the module by executing the following command as root: # echo "install amdgpu /bin/true" > /etc/modprobe.d/disable-amdgpu.conf 2. If the module is currently loaded into kernel memory, a system reboot is required to fully unload it, or attempt to unload it manually: # rmmod amdgpu Warning: Unloading the kernel module or rebooting the host will interrupt running services and terminate graphical sessions. Caveat: Disabling the amdgpu driver prevents hardware graphics acceleration and compute functionality on systems equipped with AMD Radeon or Instinct GPUs. Ensure alternative console access is available.
    • none available: Affected
    Red Hat · CVE-2026-74446 · Updated 2026-09-30T16:54:04+00:00
  • kernel-zfcpdump as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-zfcpdump

    • workaround: To mitigate this vulnerability, prevent the amdgpu kernel module from loading on systems where AMD GPU compute or display hardware is not required. 1. Blacklist the module by executing the following command as root: # echo "install amdgpu /bin/true" > /etc/modprobe.d/disable-amdgpu.conf 2. If the module is currently loaded into kernel memory, a system reboot is required to fully unload it, or attempt to unload it manually: # rmmod amdgpu Warning: Unloading the kernel module or rebooting the host will interrupt running services and terminate graphical sessions. Caveat: Disabling the amdgpu driver prevents hardware graphics acceleration and compute functionality on systems equipped with AMD Radeon or Instinct GPUs. Ensure alternative console access is available.
    • none available: Affected
    Red Hat · CVE-2026-74446 · Updated 2026-09-30T16:54:04+00:00
  • rv as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/rv

    • workaround: To mitigate this vulnerability, prevent the amdgpu kernel module from loading on systems where AMD GPU compute or display hardware is not required. 1. Blacklist the module by executing the following command as root: # echo "install amdgpu /bin/true" > /etc/modprobe.d/disable-amdgpu.conf 2. If the module is currently loaded into kernel memory, a system reboot is required to fully unload it, or attempt to unload it manually: # rmmod amdgpu Warning: Unloading the kernel module or rebooting the host will interrupt running services and terminate graphical sessions. Caveat: Disabling the amdgpu driver prevents hardware graphics acceleration and compute functionality on systems equipped with AMD Radeon or Instinct GPUs. Ensure alternative console access is available.
    • none available: Affected
    Red Hat · CVE-2026-74446 · Updated 2026-09-30T16:54:04+00:00
  • kernel as a component of Red Hat Enterprise Linux 6 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel

    Red Hat · CVE-2026-74446 · Updated 2026-09-30T16:54:04+00:00
  • kernel-debug as a component of Red Hat Enterprise Linux 6 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-debug

    Red Hat · CVE-2026-74446 · Updated 2026-09-30T16:54:04+00:00
  • kernel-devel as a component of Red Hat Enterprise Linux 6 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-devel

    Red Hat · CVE-2026-74446 · Updated 2026-09-30T16:54:04+00:00
  • kernel-headers as a component of Red Hat Enterprise Linux 6 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-headers

    Red Hat · CVE-2026-74446 · Updated 2026-09-30T16:54:04+00:00
  • kernel.src as a component of Red Hat Enterprise Linux 6 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel?arch=src

    Red Hat · CVE-2026-74446 · Updated 2026-09-30T16:54:04+00:00
  • bpftool as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/bpftool

    Red Hat · CVE-2026-74446 · Updated 2026-09-30T16:54:04+00:00
  • kernel-abi-whitelists as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-abi-whitelists

    Red Hat · CVE-2026-74446 · Updated 2026-09-30T16:54:04+00:00
  • kernel-debug-devel as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-debug-devel

    Red Hat · CVE-2026-74446 · Updated 2026-09-30T16:54:04+00:00
  • kernel-headers as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-headers

    Red Hat · CVE-2026-74446 · Updated 2026-09-30T16:54:04+00:00
  • kernel-rt as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-rt

    Red Hat · CVE-2026-74446 · Updated 2026-09-30T16:54:04+00:00
  • kernel-rt-debug-devel as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-rt-debug-devel

    Red Hat · CVE-2026-74446 · Updated 2026-09-30T16:54:04+00:00
  • kernel-rt-doc as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-rt-doc

    Red Hat · CVE-2026-74446 · Updated 2026-09-30T16:54:04+00:00
  • kernel-rt-trace-devel as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-rt-trace-devel

    Red Hat · CVE-2026-74446 · Updated 2026-09-30T16:54:04+00:00
  • kernel-tools as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-tools

    Red Hat · CVE-2026-74446 · Updated 2026-09-30T16:54:04+00:00
  • kernel-tools-libs-devel as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-tools-libs-devel

    Red Hat · CVE-2026-74446 · Updated 2026-09-30T16:54:04+00:00
  • python-perf as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/python-perf

    Red Hat · CVE-2026-74446 · Updated 2026-09-30T16:54:04+00:00

All CVSS metrics

  • HIGH 7.8 v3.1 · CNA Primary
    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • HIGH 7.8 v3.1 · NVD Secondary
    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Advisories

Technical & other

Sources: NVD · CVE.org · All sources and attribution · EPSS