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CVE-2026-74443

HIGH 8.8 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/vmwgfx: bound DMA command body size against suffix pointer vmw_cmd_dma() locates the DMA suffix at (unsigned long) &cmd->body + header->size - sizeof(*suffix) without checking that header->size is large enough to contain both cmd->body and the suffix. An undersized header makes the suffix pointer underflow back into the previous command in the bounce buffer. The verifier later writes suffix->maximumOffset, clobbering verified fields of an already-relocated earlier command -- a TOCTOU on the device-visible command stream that lets one command rewrite another's GMR id, surface id, or other authenticated fields. Reject the command if the body is too small for the suffix to fit.

ELEVATED IMPACT

Severe if exploited (CVSS 8.8), 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

8.8CVSS 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

Weakness (CWE)

Not classified.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/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

    • none available: Affected
    Red Hat · CVE-2026-74443 · Updated 2026-08-21T11:32:43+00:00
  • kernel-64k-debug-modules-extra as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

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

    • none available: Affected
    Red Hat · CVE-2026-74443 · Updated 2026-08-21T11:32:43+00:00
  • kernel-debug-core as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-debug-core

    • none available: Affected
    Red Hat · CVE-2026-74443 · Updated 2026-08-21T11:32:43+00:00
  • kernel-devel-matched as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-devel-matched

    • none available: Affected
    Red Hat · CVE-2026-74443 · Updated 2026-08-21T11:32:43+00:00
  • kernel-rt-64k-debug as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

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

    • none available: Affected
    Red Hat · CVE-2026-74443 · Updated 2026-08-21T11:32:43+00:00
  • kernel-rt-64k-modules-extra as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

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

    • none available: Affected
    Red Hat · CVE-2026-74443 · Updated 2026-08-21T11:32:43+00:00
  • kernel-rt-devel as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-rt-devel

    • none available: Affected
    Red Hat · CVE-2026-74443 · Updated 2026-08-21T11:32:43+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

    • none available: Affected
    Red Hat · CVE-2026-74443 · Updated 2026-08-21T11:32:43+00:00
  • kernel.src as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel?arch=src

    • none available: Affected
    Red Hat · CVE-2026-74443 · Updated 2026-08-21T11:32:43+00:00
  • kernel-debug as a component of Red Hat Enterprise Linux 6 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-debug

    • no fix planned: Out of support scope
    Red Hat · CVE-2026-74443 · Updated 2026-08-21T11:32:43+00:00
  • perf as a component of Red Hat Enterprise Linux 6 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/perf

    • no fix planned: Out of support scope
    Red Hat · CVE-2026-74443 · Updated 2026-08-21T11:32:43+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-2026-74443 · Updated 2026-08-21T11:32:43+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-2026-74443 · Updated 2026-08-21T11:32:43+00:00
  • kernel-tools-libs-devel as a component of Red Hat Enterprise Linux 7 · known affected

    Vendor assessment for this product only.

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

    • none available: Affected
    Red Hat · CVE-2026-74443 · Updated 2026-08-21T11:32:43+00:00
  • kernel-cross-headers as a component of Red Hat Enterprise Linux 8 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-cross-headers

    • none available: Affected
    Red Hat · CVE-2026-74443 · Updated 2026-08-21T11:32:43+00:00
  • kernel-headers as a component of Red Hat Enterprise Linux 8 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-headers

    • none available: Affected
    Red Hat · CVE-2026-74443 · Updated 2026-08-21T11:32:43+00:00
  • kernel-rt-debug-devel as a component of Red Hat Enterprise Linux 8 · known affected

    Vendor assessment for this product only.

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

    • none available: Affected
    Red Hat · CVE-2026-74443 · Updated 2026-08-21T11:32:43+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

    • none available: Affected
    Red Hat · CVE-2026-74443 · Updated 2026-08-21T11:32:43+00:00
  • kernel-zfcpdump-devel as a component of Red Hat Enterprise Linux 8 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-zfcpdump-devel

    • none available: Affected
    Red Hat · CVE-2026-74443 · Updated 2026-08-21T11:32:43+00:00
  • kernel as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel

    • none available: Affected
    Red Hat · CVE-2026-74443 · Updated 2026-08-21T11:32:43+00:00
  • kernel-64k-debug-modules-extra as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

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

    • none available: Affected
    Red Hat · CVE-2026-74443 · Updated 2026-08-21T11:32:43+00:00
  • kernel-64k-modules-partner as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

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

    • none available: Affected
    Red Hat · CVE-2026-74443 · Updated 2026-08-21T11:32:43+00:00
  • kernel-debug-modules-core as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

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

    • none available: Affected
    Red Hat · CVE-2026-74443 · Updated 2026-08-21T11:32:43+00:00
  • kernel-headers as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-headers

    • none available: Affected
    Red Hat · CVE-2026-74443 · Updated 2026-08-21T11:32:43+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

    • none available: Affected
    Red Hat · CVE-2026-74443 · Updated 2026-08-21T11:32:43+00:00
  • kernel-rt-64k-debug-modules-extra as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-rt-64k-debug-modules-extra

    • none available: Affected
    Red Hat · CVE-2026-74443 · Updated 2026-08-21T11:32:43+00:00
  • kernel-rt-64k-modules-internal as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

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

    • none available: Affected
    Red Hat · CVE-2026-74443 · Updated 2026-08-21T11:32:43+00:00
  • kernel-rt-debug-modules-core as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

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

    • none available: Affected
    Red Hat · CVE-2026-74443 · Updated 2026-08-21T11:32:43+00:00
  • kernel-rt-modules-extra as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

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

    • none available: Affected
    Red Hat · CVE-2026-74443 · Updated 2026-08-21T11:32:43+00:00
  • kernel-tools-libs-devel as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

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

    • none available: Affected
    Red Hat · CVE-2026-74443 · Updated 2026-08-21T11:32:43+00:00
  • kernel-zfcpdump-modules-extra as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

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

    • none available: Affected
    Red Hat · CVE-2026-74443 · Updated 2026-08-21T11:32:43+00:00
  • rv as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/rv

    • none available: Affected
    Red Hat · CVE-2026-74443 · Updated 2026-08-21T11:32:43+00:00

All CVSS metrics

  • HIGH 8.8 v3.1 · CNA Primary
    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
  • HIGH 8.8 v3.1 · NVD Secondary
    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References

Advisories

Technical & other

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