CVE-2026-64425

CVE CVE-2026-64425EUVD EUVD-2026-48769Published 2026-07-25T08:51:03.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: io_uring/io-wq: re-check IO_WQ_BIT_EXIT for each linked work item commit 10dc95939817 ("io_uring/io-wq: check IO_WQ_BIT_EXIT inside work run loop") fixed the obvious case where io_worker_handle_work() took one exit-bit snapshot before draining pending work, but the fix stops one level too early. io_worker_handle_work() now re-checks IO_WQ_BIT_EXIT in its outer work run loop, yet it still snapshots that bit once before processing a whole dependent linked-work chain. If io_wq_exit_start() sets IO_WQ_BIT_EXIT after the first linked item has started, the remaining linked items can still reuse stale do_kill = false, skip IO_WQ_WORK_CANCEL, and continue running after exit has begun. Move the check further inside, so it covers linked items too. Note: this is a syzbot special as it loves setting up tons of slow linked work on weird devices like msr that take forever to read, and immediately close the ring. Exit then takes a long time.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

• Linux — Linux bdf0bf73006ea8af9327cdb85cfdff4c23a5f966 <1636d85dc139b07c0449308f2bb5e0c7a2e0da99; 10dc959398175736e495f71c771f8641e1ca1907 <ab85765cbe3258b43dc6729af0e6ce3a87a133d8; 5.10.253 <5.10.261; patch: 5.10.261; d05d99573f81a091547b1778b9a50120f5d6c68a <6e2f51f3e06773c2ee98ad09738f0908b48f76f9; 6.1.167 <6.1.178; patch: 6.18.39; 10dc959398175736e495f71c771f8641e1ca1907 <29bef9934b2521f787bb15dd1985d4c0d12ae02a; patch: 5.15.212; 6.18.8 <6.18.39; 27e47500fac23d15b7dc93ff650bc4844d2581bd <d179533c610e1b4c6aa436e3c1fd1b719d2c727c; patch: 7.1.4; 85eb83694a91c89d9abe615d717c0053c3efa714 <ea61b04e1d7242cb37f5ed2cc91cf21a493f6597; patch: 6.1.178; 2e8ca1078b14142db2ce51cbd18ff9971560046b <b6f179a653a934736c88d820fe0098c3c2532549; 6.12.68 <6.12.96; patch: 0; patch: 6.6.145; 065dd936195a3466b8ebe5f9287400987ee3c063 <14b7ecad2ec56699325180a744f4b19f046401bb; patch: 6.12.96; 6.19; 5.15.203 <5.15.212; 6.6.122 <6.6.145; patch: 7.2-rc1

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

• Linux — Linux

Patchlage reports hits and suspected hits. About everything else this system says nothing — neither this page nor the situation report ever claims that an estate is safe.