CVE-2026-74450
In 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)
CSIRTS triage
- What
- Use-after-free vulnerability in AMD PowerPlay table handling.
- Who is affected
- Systems running affected Linux kernel versions with AMD PM driver enabled.
- Urgency
- Moderate; use-after-free can lead to memory corruption and potential code execution.
- Action
- Apply kernel patch fixing pptable lifetime management or update to patched kernel version.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.13% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all EPSS-scored CVEs.
Advisory coverage (3)
- unknownDSA-6466-1 linux - security updatedebian · 2026-08-25
- highCVE-2026-74450: In the Linux kernel, the following vulnerability has been resolved: drm/amd/pm: fix pptable us…nvd · 2026-08-15
- mediumCVE-2026-74450: drm/amd/pm: fix pptable use-after-freemsrc · 2026-08-11
External references
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