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CVE-2026-64425

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.1%
Linux•Linux•Versions : <=6.1.*, <=6.12.*, <6.19, <6e2f51f3e06773c2ee98ad09738f0908b48f76f9, 6.18.39, 10dc959398175736e495f71c771f8641e1ca1907, 2e8ca1078b14142db2ce51cbd18ff9971560046b, <5.15.212, 0, 27e47500fac23d15b7dc93ff650bc4844d2581bd, <=7.1.*, 7.1.4, <b6f179a653a934736c88d820fe0098c3c2532549, 065dd936195a3466b8ebe5f9287400987ee3c063, <6.12.96, bdf0bf73006ea8af9327cdb85cfdff4c23a5f966, <d179533c610e1b4c6aa436e3c1fd1b719d2c727c, 6.1.178, <=5.10.*, <ea61b04e1d7242cb37f5ed2cc91cf21a493f6597, <=6.6.*, <6.1.178, 6.18.8, 5.15.203, <14b7ecad2ec56699325180a744f4b19f046401bb, <1636d85dc139b07c0449308f2bb5e0c7a2e0da99, <6.18.39, <=6.18.*, 5.15.212, 6.6.145, 6.1.167, 6.12.68, 5.10.261, 85eb83694a91c89d9abe615d717c0053c3efa714, <5.10.261, d05d99573f81a091547b1778b9a50120f5d6c68a, <6.6.145, <29bef9934b2521f787bb15dd1985d4c0d12ae02a, <=*, 5.10.253, <=5.15.*, 6.19, 6.12.96, 6.6.122, <ab85765cbe3258b43dc6729af0e6ce3a87a133d8, 7.2

Description

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.

Gravité et risque d'exploitation

CVE-2026-64425 obtient un score CVSS de 0.0/10, soit une gravité non évaluée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.13 %, ce qui la place devant 2.2 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <=6.1.*, <=6.12.*, <6.19, <6e2f51f3e06773c2ee98ad09738f0908b48f76f9, 6.18.39, 10dc959398175736e495f71c771f8641e1ca1907, 2e8ca1078b14142db2ce51cbd18ff9971560046b, <5.15.212, 0, 27e47500fac23d15b7dc93ff650bc4844d2581bd, <=7.1.*, 7.1.4, <b6f179a653a934736c88d820fe0098c3c2532549, 065dd936195a3466b8ebe5f9287400987ee3c063, <6.12.96, bdf0bf73006ea8af9327cdb85cfdff4c23a5f966, <d179533c610e1b4c6aa436e3c1fd1b719d2c727c, 6.1.178, <=5.10.*, <ea61b04e1d7242cb37f5ed2cc91cf21a493f6597, <=6.6.*, <6.1.178, 6.18.8, 5.15.203, <14b7ecad2ec56699325180a744f4b19f046401bb, <1636d85dc139b07c0449308f2bb5e0c7a2e0da99, <6.18.39, <=6.18.*, 5.15.212, 6.6.145, 6.1.167, 6.12.68, 5.10.261, 85eb83694a91c89d9abe615d717c0053c3efa714, <5.10.261, d05d99573f81a091547b1778b9a50120f5d6c68a, <6.6.145, <29bef9934b2521f787bb15dd1985d4c0d12ae02a, <=*, 5.10.253, <=5.15.*, 6.19, 6.12.96, 6.6.122, <ab85765cbe3258b43dc6729af0e6ce3a87a133d8, 7.2) est présent sur votre parc.
  • Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
  • À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
  • Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.

Références

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