CVE-2026-31766: Linux

Описание

Оригинално описание

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)

Засегнати продукти

• Linux Linux: f09c1e6077abd1bc2ddd2b97e1135215801ca7f9 преди 3543005a42d7e8e12b21897ef6798541bf7cbcd3; f09c1e6077abd1bc2ddd2b97e1135215801ca7f9 преди 86b732fbc37ce4fb76cdd4af0fb7e30a6acdbce6; f09c1e6077abd1bc2ddd2b97e1135215801ca7f9 преди a018d1819f158991b7308e4f74609c6c029b670c
• Linux Linux: 6.16; преди 6.16; 6.18.22 до 6.18.*; 6.19.12 до 6.19.*; от 7.0 нататък

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99265
• CVE-2026-99261
• CVE-2026-99260

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-31766
• https://nvd.nist.gov/vuln/detail/CVE-2026-31766
• https://git.kernel.org/stable/c/3543005a42d7e8e12b21897ef6798541bf7cbcd3
• https://git.kernel.org/stable/c/86b732fbc37ce4fb76cdd4af0fb7e30a6acdbce6
• https://git.kernel.org/stable/c/a018d1819f158991b7308e4f74609c6c029b670c