drm/amd/pm: fix pptable use-after-free

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-74450
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 13:17:49 UTC
Updated2026-08-15 13:17:49 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: drm/amd/pm: fix pptable use-after-free amdgpu_dpm_get_pp_table() returns a pointer to a driver-owned power table after dropping adev->pm.mutex. The sysfs path then copies from that pointer. A concurrent pp_table write can replace and free the allocation during the copy, causing a use-after-free. Change the DPM interface to copy into caller-provided storage while the mutex is held. Keep the size-only query for attribute discovery without exposing the driver-owned pointer. (cherry picked from commit f6eed7acfd30099ef7baeb6ba45bb59daad80631)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 1684d3ba488529266ce6f97b88076bd185f4790e b628f2c6feb3a115ea72d3120a2bd94afc5163df git Not specified
CNA Linux Linux affected 1684d3ba488529266ce6f97b88076bd185f4790e bb493058c35c8676e48269ab6732688ea733d23c git Not specified
CNA Linux Linux affected 4.9 Not specified
CNA Linux Linux unaffected 4.9 semver Not specified
CNA Linux Linux unaffected 7.1.8 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc6 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/bb493058c35c8676e48269ab6732688ea733d23c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b628f2c6feb3a115ea72d3120a2bd94afc5163df 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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