CVE-2026-98858: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: io_uring: fix task_work add use-after-free with SQPOLL For SQPOLL, the sqpoll thread runs task_work off its own list and doesn't need to be told about it, so it can pop and complete a request as soon as mpscq_push() has published it. If that was the last request holding the ring alive, io_ring_exit_work() then frees the ctx, stops the thread, and with it the tctx, while io_req_normal_work_add() is still looking at both after the push: BUG: KASAN: slab-use-after-free in io_req_normal_work_add+0x439/0x510 Read of size 4 at addr ff11000000ca0000 by task repro/55 (...) BUG: KASAN: slab-use-after-free in queue_work_on+0x25/0x70 Write of size 8 at addr ff11000000c3bd00 by task repro/55 Hold an RCU read lock across the add, like io_req_local_work_add() already does, and have io_ring_exit_work() wait for a grace period for SQPOLL rings as well before freeing the ctx.

Засегнати продукти

• Linux Linux: af5d68f8892f8ee8f137648b79ceb2abc153a19b преди 42b3332efacfd2140be4cd0dedad4fb96b8ae90e; af5d68f8892f8ee8f137648b79ceb2abc153a19b преди 891bd8335a0de3bb15c3b797ce3026bbb0dbef6c; af5d68f8892f8ee8f137648b79ceb2abc153a19b преди 395b25968fe854d4efaa19a8e9b7a5b6d1b3eea3; af5d68f8892f8ee8f137648b79ceb2abc153a19b преди a92193c91e8839fe5fc209616ea95465ae4b919d
• Linux Linux: 6.9; преди 6.9; 6.12.113 до 6.12.*; 6.18.56 до 6.18.*; 7.2.10 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-2026-98858
• https://nvd.nist.gov/vuln/detail/CVE-2026-98858
• https://git.kernel.org/stable/c/42b3332efacfd2140be4cd0dedad4fb96b8ae90e
• https://git.kernel.org/stable/c/891bd8335a0de3bb15c3b797ce3026bbb0dbef6c
• https://git.kernel.org/stable/c/395b25968fe854d4efaa19a8e9b7a5b6d1b3eea3
• https://git.kernel.org/stable/c/a92193c91e8839fe5fc209616ea95465ae4b919d