CVE-2026-64588: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: fuse-uring: fix data races on ring->ready On weakly-ordered architectures, the store to fiq->ops can be reordered past the store to ring->ready, allowing a CPU that sees ring->ready == true via fuse_uring_ready() to dispatch requests through a stale fiq->ops pointer. Upgrade the store to smp_store_release() and the load in fuse_uring_ready() to smp_load_acquire() so that the preceding WRITE_ONCE(fiq->ops, ...) is visible to any CPU that observes ring->ready == true. Additionally, fuse_uring_do_register() publishes ring->ready with WRITE_ONCE() but the fast-path check reads it with a plain load. This is a marked-vs-unmarked access that KCSAN will flag. Wrap it in READ_ONCE() to mark it without adding unnecessary ordering. Also wrap the fc->ring load in fuse_uring_ready() in READ_ONCE() to prevent the compiler from reloading it between the NULL check and the dereference.

Засегнати продукти

• Linux Linux: c2c9af9a0b13261c36909036057a116f2edb5e1a преди b156bb9966972122b148acab8bdf415cdb8176a3; c2c9af9a0b13261c36909036057a116f2edb5e1a преди d01a09b442cb786cd44ccc7c84d57e2856d6737c; c2c9af9a0b13261c36909036057a116f2edb5e1a преди 46725a0056c884cf58a6897f222892807327d82d
• Linux Linux: 6.14; преди 6.14; 6.18.39 до 6.18.*; 7.1.4 до 7.1.*; от 7.2 нататък

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99268
• CVE-2026-99266
• CVE-2026-99267

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-64588
• https://nvd.nist.gov/vuln/detail/CVE-2026-64588
• https://git.kernel.org/stable/c/b156bb9966972122b148acab8bdf415cdb8176a3
• https://git.kernel.org/stable/c/d01a09b442cb786cd44ccc7c84d57e2856d6737c
• https://git.kernel.org/stable/c/46725a0056c884cf58a6897f222892807327d82d