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CVE-2026-74450: drm/amd/pm: fix pptable use-after-free

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-10-16

Description

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 products

• Linux kernel: 4.9 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/3fbb3ac75000e3187f500a91a4099b24206866a1
• https://git.kernel.org/stable/c/81b5af1fb0f14cace6c3b3130a05e5602a597820
• https://git.kernel.org/stable/c/8c685df5c3b261c42505110965b42f9a754eb9b7
• https://git.kernel.org/stable/c/9efc767335234cf7a892e46d45cd453b711421e7
• https://git.kernel.org/stable/c/b628f2c6feb3a115ea72d3120a2bd94afc5163df
• https://git.kernel.org/stable/c/bb493058c35c8676e48269ab6732688ea733d23c

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