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

Answer in brief

CVE-2026-74450 records a High severity (CVSS 7.8) vulnerability in drm/amd/pm: fix pptable use-after-free. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 15, 2026Updated Aug 23, 2026Source checked Sep 29, 2026First seen by HOL Aug 15, 2026Material review Aug 23, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.8
Exploitation: Not marked as known exploited
Affected software: 3 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=1684d3ba488529266ce6f97b88076bd185f4790e <b628f2c6feb3a115ea72d3120a2bd94afc5163df \|\| >=1684d3ba488529266ce6f97b88076bd185f4790e <bb493058c35c8676e48269ab6732688ea733d23c	b628f2c6feb3a115ea72d3120a2bd94afc5163df, bb493058c35c8676e48269ab6732688ea733d23c
Linux/Linuxgeneric	4.9	Not reported
Linux/Linuxgeneric	>=1684d3ba488529266ce6f97b88076bd185f4790e <3fbb3ac75000e3187f500a91a4099b24206866a1 \|\| >=1684d3ba488529266ce6f97b88076bd185f4790e <9efc767335234cf7a892e46d45cd453b711421e7 \|\| >=1684d3ba488529266ce6f97b88076bd185f4790e <81b5af1fb0f14cace6c3b3130a05e5602a597820 \|\| >=1684d3ba488529266ce6f97b88076bd185f4790e <8c685df5c3b261c42505110965b42f9a754eb9b7 \|\| >=1684d3ba488529266ce6f97b88076bd185f4790e <b628f2c6feb3a115ea72d3120a2bd94afc5163df \|\| >=1684d3ba488529266ce6f97b88076bd185f4790e <bb493058c35c8676e48269ab6732688ea733d23c	3fbb3ac75000e3187f500a91a4099b24206866a1, 9efc767335234cf7a892e46d45cd453b711421e7, 81b5af1fb0f14cace6c3b3130a05e5602a597820, 8c685df5c3b261c42505110965b42f9a754eb9b7, b628f2c6feb3a115ea72d3120a2bd94afc5163df, bb493058c35c8676e48269ab6732688ea733d23c

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to b628f2c6feb3a115ea72d3120a2bd94afc5163df; Linux/Linux to 3fbb3ac75000e3187f500a91a4099b24206866a1 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 23, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 15, 2026

Sources and claim methodology

Upstream source 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)

Quoted source text, attributed separately from HOL analysis.