CVE-2026-74450

Summary

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)

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1684d3ba488529266ce6f97b88076bd185f4790e < 3fbb3ac75000e3187f500a91a4099b24206866a1affected
LinuxLinux1684d3ba488529266ce6f97b88076bd185f4790e < 9efc767335234cf7a892e46d45cd453b711421e7affected
LinuxLinux1684d3ba488529266ce6f97b88076bd185f4790e < 81b5af1fb0f14cace6c3b3130a05e5602a597820affected
LinuxLinux1684d3ba488529266ce6f97b88076bd185f4790e < 8c685df5c3b261c42505110965b42f9a754eb9b7affected
LinuxLinux1684d3ba488529266ce6f97b88076bd185f4790e < b628f2c6feb3a115ea72d3120a2bd94afc5163dfaffected
LinuxLinux1684d3ba488529266ce6f97b88076bd185f4790e < bb493058c35c8676e48269ab6732688ea733d23caffected
LinuxLinux4.9affected
LinuxLinux0 < 4.9unaffected
LinuxLinux6.1.184 <= 6.1.*unaffected
LinuxLinux6.6.153 <= 6.6.*unaffected
LinuxLinux6.12.105 <= 6.12.*unaffected
LinuxLinux6.18.46 <= 6.18.*unaffected
LinuxLinux7.1.8 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References