CVE-2026-31766

Description

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: validate doorbell_offset in user queue creation amdgpu_userq_get_doorbell_index() passes the user-provided doorbell_offset to amdgpu_doorbell_index_on_bar() without bounds checking. An arbitrarily large doorbell_offset can cause the calculated doorbell index to fall outside the allocated doorbell BO, potentially corrupting kernel doorbell space. Validate that doorbell_offset falls within the doorbell BO before computing the BAR index, using u64 arithmetic to prevent overflow. (cherry picked from commit de1ef4ffd70e1d15f0bf584fd22b1f28cbd5e2ec)

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Produits concernés

• Linux
• Linux linux kernel

Scores CVSS

Références

• https://git.kernel.org/stable/c/3543005a42d7e8e12b21897ef6798541bf7cbcd3 Patch
• https://git.kernel.org/stable/c/86b732fbc37ce4fb76cdd4af0fb7e30a6acdbce6 Patch
• https://git.kernel.org/stable/c/a018d1819f158991b7308e4f74609c6c029b670c Patch

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories