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.
- Експлоатация: няма данни за експлоатация
- Атаката не може да се автоматизира
Описание
Оригинално описание
In the Linux kernel, the following vulnerability has been resolved: sunrpc: defer rq_argp and rq_resp free until after RCU grace period svc_rqst_free() frees rqstp->rq_argp and rqstp->rq_resp synchronously via kfree(), but defers the rqstp struct free via kfree_rcu(). After svc_exit_thread() calls list_del_rcu() and svc_rqst_free(), there is a window where RCU readers that started before list_del_rcu() can still traverse the thread list and find the rqstp. These readers (e.g. nfsd_nl_rpc_status_get_dumpit()) dereference rqstp->rq_argp, which has already been freed — a use-after-free. Fix this by moving the kfree of rq_argp and rq_resp into an explicit call_rcu() callback alongside the struct free. Resources not accessed by RCU readers (bvec, buffer pages, scratch folio, auth_data) remain synchronously freed.
Засегнати продукти
- Linux Linux: 812443865c5fc255363d4a684a62c086af1addca преди c977158237bccc3d2512d5b17c47ee3760dc8839; 812443865c5fc255363d4a684a62c086af1addca преди 0ea49d69aa806008b2424c8cf21cf746b9963967; 812443865c5fc255363d4a684a62c086af1addca преди 08bc49e0541260bf294962cf889a32a2d2713ad6; 812443865c5fc255363d4a684a62c086af1addca преди e0c5693d3f9a5d4911735ab0e0eba4eecb1f1090; 812443865c5fc255363d4a684a62c086af1addca преди c479bde671cbe2f9e152834a8b0eb7c3c295bbaf
- Linux Linux: 3.19; преди 3.19; 6.1.191 до 6.1.*; 6.12.111 до 6.12.*; 6.18.50 до 6.18.*; 7.2.4 до 7.2.*; 7.3 до *
История
- 11 септември 2026 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-89545
- https://nvd.nist.gov/vuln/detail/CVE-2026-89545
- https://git.kernel.org/stable/c/c977158237bccc3d2512d5b17c47ee3760dc8839
- https://git.kernel.org/stable/c/0ea49d69aa806008b2424c8cf21cf746b9963967
- https://git.kernel.org/stable/c/08bc49e0541260bf294962cf889a32a2d2713ad6
- https://git.kernel.org/stable/c/e0c5693d3f9a5d4911735ab0e0eba4eecb1f1090
- https://git.kernel.org/stable/c/c479bde671cbe2f9e152834a8b0eb7c3c295bbaf