CVE-2026-80859: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: fuse: fix missing barrier when checking io-uring readiness fuse_block_alloc() reads fch->initialized and then fch->io_uring. fch->io_uring is set before fch->initialized, ordered by the smp_wmb() in fuse_chan_set_intialized(), but fuse_block_alloc() has no matching read barrier between the two loads. This may lead a CPU to observe fch->initialized=1 but fch->io_uring=0, and skip the check that blocks request allocation until the io-uring queues are ready. This can reintroduce the lock-order inversion deadlock that commit 3393ff964e0f prevents. Add an smp_rmb() barrier to pair with the smp_wmb() in fuse_chan_set_initialized() to prevent this.

Засегнати продукти

• Linux Linux: 3393ff964e0fa5def66570c54a4612bf9df06b76 преди 8974575898cd7a4c818088f102b2e7a0286d3302; 3393ff964e0fa5def66570c54a4612bf9df06b76 преди dd9c835709f4bb3e4256eea7573e4e6e18f956de; 3393ff964e0fa5def66570c54a4612bf9df06b76 преди edb310bc27f0ad83e7fd558a3caf1a94ca511654
• Linux Linux: 6.14; преди 6.14; 6.18.51 до 6.18.*; 7.2.3 до 7.2.*; от 7.3 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-2026-80859
• https://nvd.nist.gov/vuln/detail/CVE-2026-80859
• https://git.kernel.org/stable/c/8974575898cd7a4c818088f102b2e7a0286d3302
• https://git.kernel.org/stable/c/dd9c835709f4bb3e4256eea7573e4e6e18f956de
• https://git.kernel.org/stable/c/edb310bc27f0ad83e7fd558a3caf1a94ca511654