CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
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: rapidio: mport_cdev: fix use-after-free in dma_req_free() dma_req_free() acquires buf_mutex through req->map, drops the mapping reference with kref_put(), and then dereferences req->map again to unlock the mutex. If kref_put() drops the last reference, mport_release_mapping() frees the mapping, and the subsequent mutex_unlock() dereferences a freed object. This is a use-after-free. Fix this by caching map and md before kref_put(), clearing req->map while holding buf_mutex, and using the cached md for mutex unlocking. The bug is reachable from userspace via the RapidIO mport character device interface.
Засегнати продукти
- Linux Linux: e8de370188d098bb49483c287b44925957c3c9b6 преди 00c5ed913b0dc563fbeb8a97ea8916c03bbbbf6a; e8de370188d098bb49483c287b44925957c3c9b6 преди fc79c07cdcde02c5b17633d78777de6ac2c14b29; e8de370188d098bb49483c287b44925957c3c9b6 преди 26ccfe7d69e27b0d933ae0a64a23a0cb9b9a85a6; e8de370188d098bb49483c287b44925957c3c9b6 преди bd8881c24a9520f9c3d3e855d866197f63e471a7; e8de370188d098bb49483c287b44925957c3c9b6 преди 9a9929ec875ff20922c90c96fd544ae8a2a61a8d; e8de370188d098bb49483c287b44925957c3c9b6 преди e6e925cc1f8067c65c7bec3da50a0ead3b3ef4e0; e8de370188d098bb49483c287b44925957c3c9b6 преди 211c68d817a3d9dc14c0026a59da7cac30f8147e; e8de370188d098bb49483c287b44925957c3c9b6 преди 5cbef379a94b161726c5f504598bf4791d45cedc
- Linux Linux: 4.6; преди 4.6; 5.10.270 до 5.10.*; 5.15.221 до 5.15.*; 6.1.188 до 6.1.*; 6.6.157 до 6.6.*; 6.12.109 до 6.12.*; 6.18.50 до 6.18.*; 7.2.4 до 7.2.*; от 7.3 нататък
История
- 11 септември 2026 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-89742
- https://nvd.nist.gov/vuln/detail/CVE-2026-89742
- https://git.kernel.org/stable/c/00c5ed913b0dc563fbeb8a97ea8916c03bbbbf6a
- https://git.kernel.org/stable/c/fc79c07cdcde02c5b17633d78777de6ac2c14b29
- https://git.kernel.org/stable/c/26ccfe7d69e27b0d933ae0a64a23a0cb9b9a85a6
- https://git.kernel.org/stable/c/bd8881c24a9520f9c3d3e855d866197f63e471a7
- https://git.kernel.org/stable/c/9a9929ec875ff20922c90c96fd544ae8a2a61a8d
- https://git.kernel.org/stable/c/e6e925cc1f8067c65c7bec3da50a0ead3b3ef4e0
- https://git.kernel.org/stable/c/211c68d817a3d9dc14c0026a59da7cac30f8147e
- https://git.kernel.org/stable/c/5cbef379a94b161726c5f504598bf4791d45cedc