# CVE-2026-45853: drm/amdgpu: Use kvfree instead of kfree in amdgpu_gmc_get_nps_memranges()

Status: published. Published: 2026-05-27. Updated: 2026-11-06.

In the Linux kernel, the following vulnerability has been resolved:

drm/amdgpu: Use kvfree instead of kfree in amdgpu_gmc_get_nps_memranges()

amdgpu_discovery_get_nps_info() internally allocates memory for ranges
using kvcalloc(), which may use vmalloc() for large allocation. Using
kfree() to release vmalloc memory will lead to a memory corruption.

Use kvfree() to safely handle both kmalloc and vmalloc allocations.

Compile tested only. Issue found using a prototype static analysis tool
and code review.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Linux / Linux: ≥ b194d21b9bcc15b50df1bc3ff7428e51c2918a6f; < 16e7e7ad8cdc6b4c4af7f31e262f1494c1b2a55e (affected, git); ≥ b194d21b9bcc15b50df1bc3ff7428e51c2918a6f; < 9ae85b0c1909b6c6bfd2636b04cdaf7f520bf2b5 (affected, git); ≥ b194d21b9bcc15b50df1bc3ff7428e51c2918a6f; < f441538893eba6347b983f2904819ca6c99da65e (affected, git); ≥ b194d21b9bcc15b50df1bc3ff7428e51c2918a6f; < 0c44d61945c4a80775292d96460aa2f22e62f86c (affected, git). Source: CNA: Linux
- Linux / Linux: 6.11 (affected); ≥ 0; < 6.11 (unaffected, semver); ≥ 6.12.75; ≤ 6.12.* (unaffected, semver); ≥ 6.18.14; ≤ 6.18.* (unaffected, semver); ≥ 6.19.4; ≤ 6.19.* (unaffected, semver); ≥ 7.0; ≤ * (unaffected, original_commit_for_fix). Source: CNA: Linux

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: 0.16% as of 2026-11-06; percentile 5.66%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: Not reported

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://git.kernel.org/stable/c/16e7e7ad8cdc6b4c4af7f31e262f1494c1b2a55e (CNA: Linux)

- https://git.kernel.org/stable/c/9ae85b0c1909b6c6bfd2636b04cdaf7f520bf2b5 (CNA: Linux)

- https://git.kernel.org/stable/c/f441538893eba6347b983f2904819ca6c99da65e (CNA: Linux)

- https://git.kernel.org/stable/c/0c44d61945c4a80775292d96460aa2f22e62f86c (CNA: Linux)

## Provenance

- CNA: Linux: https://www.cve.org/CVERecord?id=CVE-2026-45853; retrieved 2026-11-06; source updated 2026-11-06

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-45853; retrieved 2026-11-06; source updated Not reported

Revision: 6cc124e7e1ca58a72e62fdc75188c032965213820721c7418feee34ec1be5d38

Canonical: https://y2.dev/cve/CVE-2026-45853

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Collected public records only. Check source status for coverage and freshness.