CVE-2026-68272: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: validate CP_GFX_SHADOW chunk size in CS pass1 Add a minimum-length check for the AMDGPU_CHUNK_ID_CP_GFX_SHADOW chunk in amdgpu_cs_pass1(), matching the gate already present for the IB, FENCE and BO_HANDLES chunk types. The CP_GFX_SHADOW case previously shared a bare break with the dependency and syncobj chunk types, which do not dereference a fixed-size struct. When userspace submits this chunk with length_dw == 0, vmemdup_array_user() is called with size 0 and returns ZERO_SIZE_PTR, which passes the IS_ERR() check. amdgpu_cs_p2_shadow() then dereferences chunk->kdata as a struct drm_amdgpu_cs_chunk_cp_gfx_shadow (reading shadow->flags), faulting on the ZERO_SIZE_PTR and causing a NULL-pointer dereference. This is reachable by an unprivileged process in the render group. Reject undersized chunks with -EINVAL during pass1 so the bad submission is rejected before pass2 ever dereferences the data. (cherry picked from commit 7f61b2eef7415eccdb40850aca0de94211948657)

Засегнати продукти

• Linux Linux: ac9287055ff16a092416c76a19006764e4c6a978 преди 3f190956404da55560056ce20606010e18bc059c; ac9287055ff16a092416c76a19006764e4c6a978 преди 2aa9ea2bd5146d237c8cc16d8737d878b0298a94; ac9287055ff16a092416c76a19006764e4c6a978 преди 315d2e5741a81b0be763e80413a2677e22b7e596; ac9287055ff16a092416c76a19006764e4c6a978 преди 24668ca3ec19434d7a9574bf9112f2b0614c3a4e; ac9287055ff16a092416c76a19006764e4c6a978 преди 84c4c36acd5c4b2558b5069f869a165b2c655c84
• Linux Linux: 6.5; преди 6.5; 6.6.148 до 6.6.*; 6.12.101 до 6.12.*; 6.18.42 до 6.18.*; 7.1.6 до 7.1.*; от 7.2 нататък

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99268
• CVE-2026-99266
• CVE-2026-99267

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-68272
• https://nvd.nist.gov/vuln/detail/CVE-2026-68272
• https://git.kernel.org/stable/c/3f190956404da55560056ce20606010e18bc059c
• https://git.kernel.org/stable/c/2aa9ea2bd5146d237c8cc16d8737d878b0298a94
• https://git.kernel.org/stable/c/315d2e5741a81b0be763e80413a2677e22b7e596
• https://git.kernel.org/stable/c/24668ca3ec19434d7a9574bf9112f2b0614c3a4e
• https://git.kernel.org/stable/c/84c4c36acd5c4b2558b5069f869a165b2c655c84