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CVE-2026-64372

HIGH 7.8 ALL-YEARS

Published 2026-07-25 · Last modified 2026-10-19 · Linux · NVD: Modified

In the Linux kernel, the following vulnerability has been resolved: cpufreq: pcc: fix use-after-free and double free in _OSC evaluation pcc_cpufreq_do_osc() calls acpi_evaluate_object() twice for the two-phase _OSC negotiation. Between the two calls it freed output.pointer but left output.length unchanged. Since acpi_evaluate_object() treats a non-zero length with a non-NULL pointer as an existing buffer to write into, the second call wrote into freed memory (use-after-free). The subsequent kfree(output.pointer) at out_free then freed the same pointer a second time (double free). Reset output.pointer to NULL and output.length to ACPI_ALLOCATE_BUFFER after freeing the first result, so ACPICA allocates a fresh buffer for each phase independently.

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 · 2nd 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.

Search for new PoCs

Search GitHub now — results may be empty or unverified.

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 Linux Kernel

Weakness (CWE)

  • CWE-416: Use After Free

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.

  • bpftool as a component of Red Hat Enterprise Linux 7 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/bpftool

    • none available: Affected
    Red Hat · CVE-2026-64372 · Updated 2026-07-29T11:27:17+00:00
  • kernel-abi-whitelists as a component of Red Hat Enterprise Linux 7 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-abi-whitelists

    • none available: Affected
    Red Hat · CVE-2026-64372 · Updated 2026-07-29T11:27:17+00:00
  • kernel-debug as a component of Red Hat Enterprise Linux 7 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-debug

    • none available: Affected
    Red Hat · CVE-2026-64372 · Updated 2026-07-29T11:27:17+00:00
  • kernel-debug-devel as a component of Red Hat Enterprise Linux 7 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-debug-devel

    • none available: Affected
    Red Hat · CVE-2026-64372 · Updated 2026-07-29T11:27:17+00:00
  • kernel-doc as a component of Red Hat Enterprise Linux 7 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-doc

    • none available: Affected
    Red Hat · CVE-2026-64372 · Updated 2026-07-29T11:27:17+00:00
  • kernel-kdump as a component of Red Hat Enterprise Linux 7 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-kdump

    • none available: Affected
    Red Hat · CVE-2026-64372 · Updated 2026-07-29T11:27:17+00:00
  • kernel-rt as a component of Red Hat Enterprise Linux 7 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-rt

    • none available: Affected
    Red Hat · CVE-2026-64372 · Updated 2026-07-29T11:27:17+00:00
  • kernel-rt-debug-devel as a component of Red Hat Enterprise Linux 7 · known affected

    Vendor assessment for this product only.

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

    • none available: Affected
    Red Hat · CVE-2026-64372 · Updated 2026-07-29T11:27:17+00:00
  • kernel-rt-debug-kvm as a component of Red Hat Enterprise Linux 7 · known affected

    Vendor assessment for this product only.

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

    • none available: Affected
    Red Hat · CVE-2026-64372 · Updated 2026-07-29T11:27:17+00:00
  • kernel-rt-doc as a component of Red Hat Enterprise Linux 7 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-rt-doc

    • none available: Affected
    Red Hat · CVE-2026-64372 · Updated 2026-07-29T11:27:17+00:00
  • kernel-rt-trace as a component of Red Hat Enterprise Linux 7 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-rt-trace

    • none available: Affected
    Red Hat · CVE-2026-64372 · Updated 2026-07-29T11:27:17+00:00
  • kernel-rt-trace-kvm as a component of Red Hat Enterprise Linux 7 · known affected

    Vendor assessment for this product only.

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

    • none available: Affected
    Red Hat · CVE-2026-64372 · Updated 2026-07-29T11:27:17+00:00
  • kernel-tools as a component of Red Hat Enterprise Linux 7 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-tools

    • none available: Affected
    Red Hat · CVE-2026-64372 · Updated 2026-07-29T11:27:17+00:00
  • kernel-tools-libs as a component of Red Hat Enterprise Linux 7 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-tools-libs

    • none available: Affected
    Red Hat · CVE-2026-64372 · Updated 2026-07-29T11:27:17+00:00
  • kernel.src as a component of Red Hat Enterprise Linux 7 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel?arch=src

    • none available: Affected
    Red Hat · CVE-2026-64372 · Updated 2026-07-29T11:27:17+00:00
  • python-perf as a component of Red Hat Enterprise Linux 7 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/python-perf

    • none available: Affected
    Red Hat · CVE-2026-64372 · Updated 2026-07-29T11:27:17+00:00
  • kernel as a component of Red Hat Enterprise Linux 10 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel

    Red Hat · CVE-2026-64372 · Updated 2026-07-29T11:27:17+00:00
  • kernel-core as a component of Red Hat Enterprise Linux 10 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-core

    Red Hat · CVE-2026-64372 · Updated 2026-07-29T11:27:17+00:00
  • kernel-rt-64k as a component of Red Hat Enterprise Linux 10 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

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

    Red Hat · CVE-2026-64372 · Updated 2026-07-29T11:27:17+00:00
  • kernel-rt-debug-kvm as a component of Red Hat Enterprise Linux 10 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

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

    Red Hat · CVE-2026-64372 · Updated 2026-07-29T11:27:17+00:00
  • kernel-zfcpdump-devel as a component of Red Hat Enterprise Linux 10 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-zfcpdump-devel

    Red Hat · CVE-2026-64372 · Updated 2026-07-29T11:27:17+00:00
  • kernel-doc 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-doc

    Red Hat · CVE-2026-64372 · Updated 2026-07-29T11:27:17+00:00
  • kernel-debug-devel as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-debug-devel

    Red Hat · CVE-2026-64372 · Updated 2026-07-29T11:27:17+00:00
  • kernel-rt-debug-kvm as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

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

    Red Hat · CVE-2026-64372 · Updated 2026-07-29T11:27:17+00:00
  • kernel-zfcpdump-devel as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-zfcpdump-devel

    Red Hat · CVE-2026-64372 · Updated 2026-07-29T11:27:17+00:00
  • kernel-64k-debug-modules-core as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

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

    Red Hat · CVE-2026-64372 · Updated 2026-07-29T11:27:17+00:00
  • kernel-debug-devel as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-debug-devel

    Red Hat · CVE-2026-64372 · Updated 2026-07-29T11:27:17+00:00
  • kernel-modules-internal as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-modules-internal

    Red Hat · CVE-2026-64372 · Updated 2026-07-29T11:27:17+00:00
  • kernel-rt-64k-devel-matched as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

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

    Red Hat · CVE-2026-64372 · Updated 2026-07-29T11:27:17+00:00
  • kernel-rt-debug-modules-internal as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

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

    Red Hat · CVE-2026-64372 · Updated 2026-07-29T11:27:17+00:00
  • kernel-uki-virt-addons as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

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

    Red Hat · CVE-2026-64372 · Updated 2026-07-29T11:27:17+00:00
  • rv as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/rv

    Red Hat · CVE-2026-64372 · Updated 2026-07-29T11:27:17+00:00

Known Affected Software Configurations

VendorProductVersion range
LinuxLinux Kernel≥ 2.6.34 and < 5.10.261
LinuxLinux Kernel≥ 5.11 and < 5.15.212
LinuxLinux Kernel≥ 5.16 and < 6.1.178
LinuxLinux Kernel≥ 6.2 and < 6.6.145
LinuxLinux Kernel≥ 6.7 and < 6.12.96
LinuxLinux Kernel≥ 6.13 and < 6.18.39
LinuxLinux Kernel≥ 6.19 and < 7.1.4

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

Patches & mitigations

Advisories

Technical & other

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