CVE-2026-89922
KVM: s390: Take srcu when importing watchpoint data
HIGH 7.8
At a glance
- Source
- NVD
- EPSS
- EPSS 0.16 % · percentile 6 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Received
Description
In the Linux kernel, the following vulnerability has been resolved: KVM: s390: Take srcu when importing watchpoint data __import_wp_info() backs up the original guest memory contents of a watchpoint with read_guest_abs(), which is kvm_read_guest() and therefore resolves the memslot via __kvm_memslots(). That requires kvm->srcu (or kvm->slots_lock) to be held, otherwise a concurrent memslot update can free the memslots array under us once its SRCU grace period has elapsed. As this is not fast path, following lock ordering (mutex first, then srcu) take the big hammer and hold the srcu for the full import.
References
- https://git.kernel.org/stable/c/6830fbc3724bf49c142aae69a4694f115fa9cedd
- https://git.kernel.org/stable/c/f8e3a9997d5ecd56ebe4b262ff424516c068fecb
- https://git.kernel.org/stable/c/76f5b4ea9ed0aa5a34bda9d8a878f2c73026ec03
- https://git.kernel.org/stable/c/cc710ee45395efb4937e042960f791d33924e5f6
- https://git.kernel.org/stable/c/4c05bf21d1806853e662cc19e744736a3408f155
- https://git.kernel.org/stable/c/a4e482def8533ebace517d9f67f1465841b1f982
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | Linux |
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | NVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary) |
European references
- ENISA EUVD · EUVD-2026-80522
- GCVE · GCVE-0-2026-89922
CERT-FR advisories
- CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1375 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1289 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1253 — Multiples vulnérabilités dans le noyau Linux de Debian · cert.ssi.gouv.fr
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 27291e2165b6de70c476b7b675308113edd69a60 < 6830fbc3724bf49c142aae69a4694f115fa9cedd ; affected 27291e2165b6de70c476b7b675308113edd69a60 < f8e3a9997d5ecd56ebe4b262ff424516c068fecb ; affected 27291e2165b6de70c476b7b675308113edd69a60 < 76f5b4ea9ed0aa5a34bda9d8a878f2c73026ec03 ; affected 27291e2165b6de70c476b7b675308113edd69a60 < cc710ee45395efb4937e042960f791d33924e5f6 ; affected 27291e2165b6de70c476b7b675308113edd69a60 < 4c05bf21d1806853e662cc19e744736a3408f155 ; affected 27291e2165b6de70c476b7b675308113edd69a60 < a4e482def8533ebace517d9f67f1465841b1f982 |
| Linux · Linux | affected 3.16 ; unaffected 0 < 3.16 ; unaffected 6.1.188 ≤ 6.1.* ; unaffected 6.6.157 ≤ 6.6.* ; unaffected 6.12.110 ≤ 6.12.* ; unaffected 6.18.51 ≤ 6.18.* |
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 |