CVE-2026-89922KVM: s390: Take srcu when importing watchpoint data
- 7.8HighCVSS base score
- 0.16%Exploitation in 30 daysEPSS · top 94% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 5 days later
· 5 days later
Published
- 33 days later
· 33 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.16% · top 94% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 27291e2165b6de70c476b7b675308113edd69a60 – < 6830fbc3724bf49c142aae69a4694f115fa9cedd
- affected 27291e2165b6de70c476b7b675308113edd69a60 – < f8e3a9997d5ecd56ebe4b262ff424516c068fecb
- affected 27291e2165b6de70c476b7b675308113edd69a60 – < 76f5b4ea9ed0aa5a34bda9d8a878f2c73026ec03
- affected 27291e2165b6de70c476b7b675308113edd69a60 – < cc710ee45395efb4937e042960f791d33924e5f6
- affected 27291e2165b6de70c476b7b675308113edd69a60 – < 4c05bf21d1806853e662cc19e744736a3408f155
- affected 27291e2165b6de70c476b7b675308113edd69a60 – < a4e482def8533ebace517d9f67f1465841b1f982
- affected 3.16
- unaffected < 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.*
- unaffected 7.2.5 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References6
- https://git.kernel.org/stable/c/6830fbc3724bf49c142aae69a4694f115fa9cedd (opens in a new tab)
- https://git.kernel.org/stable/c/f8e3a9997d5ecd56ebe4b262ff424516c068fecb (opens in a new tab)
- https://git.kernel.org/stable/c/76f5b4ea9ed0aa5a34bda9d8a878f2c73026ec03 (opens in a new tab)
- https://git.kernel.org/stable/c/cc710ee45395efb4937e042960f791d33924e5f6 (opens in a new tab)
- https://git.kernel.org/stable/c/4c05bf21d1806853e662cc19e744736a3408f155 (opens in a new tab)
- https://git.kernel.org/stable/c/a4e482def8533ebace517d9f67f1465841b1f982 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-80522 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-89922)Record last updated .