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CVE-2026-89801: Linux

7.8

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: drm/nouveau/uvmm: fix premature region free on failed OP_UNMAP_SPARSE In nouveau_uvmm_bind_job_submit()'s OP_UNMAP_SPARSE arm, op->reg is set from nouveau_uvma_region_find(), which only looks the region up and takes no reference; a region's sole reference is its membership in uvmm->region_mt. Two failure paths leave op->reg set: the -ENOENT check when the region is busy, and the drm_gpuvm_sm_unmap_ops_create() failure. The sibling nouveau_uvmm_sm_unmap_prepare() failure just below clears op->reg; these two do not. unwind_continue steps back one op, so the failing op is skipped by the unwind loop and its op->reg stays set. nouveau_uvmm_bind_job_cleanup() then enters its if (op->reg) branch and calls nouveau_uvma_region_remove() and nouveau_uvma_region_put() on it, dropping the tree's sole reference and freeing a region this job never created. The comment above the cleanup loop documents the broken invariant: op->reg must be NULL on submit failure. This frees a live region on an unrelated failure, reachable single-job when drm_gpuvm_sm_unmap_ops_create() returns -ENOMEM; if another job owns the same region, its cleanup then removes and puts the freed region, a use-after-free. Clear op->reg on both failure paths.

    Засегнати продукти

    • Linux Linux: b88baab828713ce0b49b185444b2ee83bed373a8 преди ba42d8a1c2c7629c61914df11a7d63ac77449ffb; b88baab828713ce0b49b185444b2ee83bed373a8 преди 88114e3a96582882e63b2f73aa7a5a9cf0d5073c; b88baab828713ce0b49b185444b2ee83bed373a8 преди 24c25b182d17d1bdfde0088c96bdf6f93e8f46bc; b88baab828713ce0b49b185444b2ee83bed373a8 преди 4083d24c2636fde7b18076115af52820d203bc57; b88baab828713ce0b49b185444b2ee83bed373a8 преди ccf930812f23b8259ef64fd3394d53b093e4651a
    • Linux Linux: 6.6; преди 6.6; 6.6.157 до 6.6.*; 6.12.110 до 6.12.*; 6.18.51 до 6.18.*; 7.2.5 до 7.2.*; от 7.3 нататък

    История

    • 16 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-89801: Linux | freedomonline.bg