CVE-2026-89926KVM: s390: Fix length check __import_wp_info()
- —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 length check __import_wp_info() struct kvm_hw_breakpoint::len is a __u64 that is fully controlled by user space. This is then assigned to wp_info->len, which is an int. The bounds check is done on the truncated value while the allocation uses the untruncated one: wp_info->len = bp_data->len; [...] if (wp_info->len < 0 || wp_info->len > MAX_WP_SIZE) return -EINVAL; wp_info->old_data = kmalloc(bp_data->len, GFP_KERNEL_ACCOUNT); Use the validated value for the allocation as intended. Without this fix userspace can trigger >4GB allocations which will fail and result in a WARN due to MAX_PAGE_ORDER.
Timeline
ID reserved
By Linux
- 5 days later
· 5 days later
Published
- 44 days later
· 44 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 – < 36d62dfb3cac66e6a97fd850a592c2ed56e35ba5
- affected 27291e2165b6de70c476b7b675308113edd69a60 – < aef540194effd768bed0bd2e6a74fe135a3d7c3a
- affected 27291e2165b6de70c476b7b675308113edd69a60 – < 71153d3262517e1c02c3a66aa5094f279b2d1454
- affected 27291e2165b6de70c476b7b675308113edd69a60 – < fec89d327d9b2b669b5bbdac209386c6317c3722
- affected 27291e2165b6de70c476b7b675308113edd69a60 – < b94ab9caa5d72c78226121cccff5e33f946da900
- affected 27291e2165b6de70c476b7b675308113edd69a60 – < beb9c55af609c4c7308259d7191688c75a4e3d4a
- affected 27291e2165b6de70c476b7b675308113edd69a60 – < 3fe801db90bdeefb0bbdda42d832846b53f64f8a
- affected 27291e2165b6de70c476b7b675308113edd69a60 – < 4c07680a467e2f7697245bcd11691bffb2a6f0ed
- affected 3.16
- unaffected < 3.16
- unaffected 5.10.273 – ≤ 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/36d62dfb3cac66e6a97fd850a592c2ed56e35ba5 (opens in a new tab)
- https://git.kernel.org/stable/c/aef540194effd768bed0bd2e6a74fe135a3d7c3a (opens in a new tab)
- https://git.kernel.org/stable/c/71153d3262517e1c02c3a66aa5094f279b2d1454 (opens in a new tab)
- https://git.kernel.org/stable/c/fec89d327d9b2b669b5bbdac209386c6317c3722 (opens in a new tab)
- https://git.kernel.org/stable/c/b94ab9caa5d72c78226121cccff5e33f946da900 (opens in a new tab)
- https://git.kernel.org/stable/c/beb9c55af609c4c7308259d7191688c75a4e3d4a (opens in a new tab)
- https://git.kernel.org/stable/c/3fe801db90bdeefb0bbdda42d832846b53f64f8a (opens in a new tab)
- https://git.kernel.org/stable/c/4c07680a467e2f7697245bcd11691bffb2a6f0ed (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-2026-80526 (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-2026-89926)Record last updated .