io_uring/io-wq: re-check IO_WQ_BIT_EXIT for each linked work item (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.13 % · percentile 2 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Modified
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.
References
- https://git.kernel.org/stable/c/14b7ecad2ec56699325180a744f4b19f046401bb
- https://git.kernel.org/stable/c/d179533c610e1b4c6aa436e3c1fd1b719d2c727c
- https://git.kernel.org/stable/c/6e2f51f3e06773c2ee98ad09738f0908b48f76f9
- https://git.kernel.org/stable/c/ea61b04e1d7242cb37f5ed2cc91cf21a493f6597
- https://git.kernel.org/stable/c/b6f179a653a934736c88d820fe0098c3c2532549
- https://git.kernel.org/stable/c/1636d85dc139b07c0449308f2bb5e0c7a2e0da99
- https://git.kernel.org/stable/c/ab85765cbe3258b43dc6729af0e6ce3a87a133d8
- https://git.kernel.org/stable/c/29bef9934b2521f787bb15dd1985d4c0d12ae02a
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2026-48769
- GCVE · GCVE-0-2026-64425
CERT-FR advisories
- CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1372 — Multiples vulnérabilités dans les produits SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1335 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1333 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1298 — Multiples vulnérabilités dans les produits Siemens · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1286 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1252 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1229 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1203 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1162 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1031 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0982 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.10.253 < 5.10.261cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.15.203 < 5.15.212cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.1.167 < 6.1.178cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.6.122 < 6.6.145cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.12.68 < 6.12.96cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.18.8 < 6.18.39cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.19.1 < 7.1.4cpe:2.3:o:linux:linux_kernel:6.19:-:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.19:rc7:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.19:rc8:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 065dd936195a3466b8ebe5f9287400987ee3c063 < 14b7ecad2ec56699325180a744f4b19f046401bb ; affected 27e47500fac23d15b7dc93ff650bc4844d2581bd < d179533c610e1b4c6aa436e3c1fd1b719d2c727c ; affected d05d99573f81a091547b1778b9a50120f5d6c68a < 6e2f51f3e06773c2ee98ad09738f0908b48f76f9 ; affected 85eb83694a91c89d9abe615d717c0053c3efa714 < ea61b04e1d7242cb37f5ed2cc91cf21a493f6597 ; affected 2e8ca1078b14142db2ce51cbd18ff9971560046b < b6f179a653a934736c88d820fe0098c3c2532549 ; affected bdf0bf73006ea8af9327cdb85cfdff4c23a5f966 < 1636d85dc139b07c0449308f2bb5e0c7a2e0da99 |
| Linux · Linux | affected 6.19 ; unaffected 0 < 6.19 ; unaffected 5.10.261 ≤ 5.10.* ; unaffected 5.15.212 ≤ 5.15.* ; unaffected 6.1.178 ≤ 6.1.* ; unaffected 6.6.145 ≤ 6.6.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |