CVE-2026-46006
In the Linux kernel, the following vulnerability has been resolved: drm/nouveau: fix u32 overflow in pushbuf reloc bounds check nouveau_gem_pushbuf_reloc_apply() validates each relocation with if (r->reloc_bo_offset + 4 > nvbo->bo.base.size) but reloc_bo_offset is __u32 (uapi/drm/nouveau_drm.h) and the integer literal 4 promotes to unsigned int, so the addition is performed in 32 bits and wraps before the comparison against the size_t bo size. Cast to u64 so the addition happens in 64-bit arithmetic. [ Add Fixes: tag. - Danilo ]
脆弱性の種類
In the Linux kernel, the following vulnerability has been resolved: drm/nouveau: fix u32 overflow in pushbuf reloc bounds check nouveau_gem_pushbuf_reloc_apply() validates each relocation with if (r->reloc_bo_offset + 4 > nvbo->bo.base.size) but reloc_bo_offset is __u32 (uapi/drm/nouveau_drm.h) and the integer literal 4 promotes to unsigned int, so the addition is performed in 32 bits and wraps before the comparison against the size_t bo size. Cast to u64 so the addition happens in 64-bit arithmetic. [ Add Fixes: tag. - Danilo ]
影響を受ける製品
- linux linux_kernel
参考情報
- https://git.kernel.org/stable/c/2fc87d37be1b730a149b035f9375fdb8cc5333a5
- https://git.kernel.org/stable/c/332884f5eb79dd60a7162b079d09d39208567a31
- https://git.kernel.org/stable/c/3429275684f4bad42876955301f3c5c814aae909
- https://git.kernel.org/stable/c/45a45184b9c0b0b26ead06e370cda2073616a7cc
- https://git.kernel.org/stable/c/573a1104bd36e49c067a9dc62e7c476d5ee7e92a
- https://git.kernel.org/stable/c/d749a9a0ee4014681487e7ae549901aa8c176637