CVE-2026-89764: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: rust: devres: fix race between concurrent revokers There is a potential race condition when two paths try to revoke a Devres concurrently. The driver core's devres_release_all() calls Revocable::revoke() via the release callback, while Devres::drop() calls revoke_nosync() on another CPU. The revoker that does not claim the is_available swap returns immediately, but the revoker that did may still be executing drop_in_place() on the inner data. This can cause a use-after-free when the other revoker's caller proceeds to drop adjacent resources that drop_in_place() still references (e.g., Devres<DmaMappedSgt> racing with SGTable freeing the backing sg_table and pages). Fix this by adding a Completion. The release callback signals the Completion after revoke() finishes, and Devres::drop() waits for it when it loses the is_available swap. This ensures the wrapped object is fully torn down before Devres::drop() returns.

Засегнати продукти

• Linux Linux: 05aa6fb1c21d7fb9df735da24096d793223789d5 преди e7930d857cc7930fc39b487ea9f3a453eca3713e; 05aa6fb1c21d7fb9df735da24096d793223789d5 преди c7e3d57c705ab1053a6a1bbef96795e792da1540; 05aa6fb1c21d7fb9df735da24096d793223789d5 преди acc516dfa1972d31836b50abc0115216cd0fccc5
• Linux Linux: 6.18; преди 6.18; 6.18.56 до 6.18.*; 7.2.4 до 7.2.*; от 7.3 нататък

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99265
• CVE-2026-99261
• CVE-2026-99260

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-89764
• https://nvd.nist.gov/vuln/detail/CVE-2026-89764
• https://git.kernel.org/stable/c/e7930d857cc7930fc39b487ea9f3a453eca3713e
• https://git.kernel.org/stable/c/c7e3d57c705ab1053a6a1bbef96795e792da1540
• https://git.kernel.org/stable/c/acc516dfa1972d31836b50abc0115216cd0fccc5