CVE-2026-89924KVM: s390: Fix old_data leak in guest debug error path
- —Not scoredno CVSS score yet
- 0.22%Exploitation in 30 daysEPSS · top 88% 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: Fix old_data leak in guest debug error path __import_wp_info() allocates a per-watchpoint old_data buffer to back up the original guest memory contents. If a later watchpoint of the same KVM_SET_GUEST_DEBUG request fails to import, kvm_s390_import_bp_data() jumps to the error label, which frees the wp_info array but not the old_data buffers of the entries that were imported successfully. Up to MAX_BP_COUNT - 1 buffers of up to MAX_WP_SIZE bytes are leaked per failed request, and the request can be repeated. Create error handling for cleaning up all created old_data memory areas.
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
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.22% · top 88% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected 27291e2165b6de70c476b7b675308113edd69a60 – < 124c81ee610e1fbdd93d4399f88d9e28ba97a941
- affected 27291e2165b6de70c476b7b675308113edd69a60 – < e5ae7816e5ad145618f7fd568a0e8a94dd9f81f4
- affected 27291e2165b6de70c476b7b675308113edd69a60 – < c85d402553987777cc4742751437ea5dcbf98a7b
- affected 27291e2165b6de70c476b7b675308113edd69a60 – < 5fbf319137735252eefa507193c9a619af5b7457
- affected 27291e2165b6de70c476b7b675308113edd69a60 – < 4048d0a252163084794be3e37995b872c5178913
- affected 27291e2165b6de70c476b7b675308113edd69a60 – < f55e4d415d95342d5753e528e05a1e8623992c3f
- affected 27291e2165b6de70c476b7b675308113edd69a60 – < 46cb8a273e2f853f89a78b59dbdff8787b6e1c86
- affected 27291e2165b6de70c476b7b675308113edd69a60 – < aa9c8e8baf1e765fa65b93212522c636f25d846f
- affected 3.16
- unaffected < 3.16
- unaffected 5.10.270 – ≤ 5.10.*
- unaffected 5.15.221 – ≤ 5.15.*
- 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
References8
- https://git.kernel.org/stable/c/124c81ee610e1fbdd93d4399f88d9e28ba97a941 (opens in a new tab)
- https://git.kernel.org/stable/c/e5ae7816e5ad145618f7fd568a0e8a94dd9f81f4 (opens in a new tab)
- https://git.kernel.org/stable/c/c85d402553987777cc4742751437ea5dcbf98a7b (opens in a new tab)
- https://git.kernel.org/stable/c/5fbf319137735252eefa507193c9a619af5b7457 (opens in a new tab)
- https://git.kernel.org/stable/c/4048d0a252163084794be3e37995b872c5178913 (opens in a new tab)
- https://git.kernel.org/stable/c/f55e4d415d95342d5753e528e05a1e8623992c3f (opens in a new tab)
- https://git.kernel.org/stable/c/46cb8a273e2f853f89a78b59dbdff8787b6e1c86 (opens in a new tab)
- https://git.kernel.org/stable/c/aa9c8e8baf1e765fa65b93212522c636f25d846f (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-2026-80524 (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-2026-89924)Record last updated .