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CVE-2026-31483s390/syscalls: Add spectre boundary for syscall dispatch table
- 5.5MediumCVSS base score
- 0.12%Exploitation in 30 daysEPSS · top 98% 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: s390/syscalls: Add spectre boundary for syscall dispatch table The s390 syscall number is directly controlled by userspace, but does not have an array_index_nospec() boundary to prevent access past the syscall function pointer tables.
Timeline
ID reserved
By Linux
- 44 days later
· 44 days later
Published
- 7 months later
· 7 months 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 |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.12% · top 98% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 56e62a73702836017564eaacd5212e4d0fa1c01d – < 3c3b97064764899c39a0abbd35a6caa031e70333
- affected 56e62a73702836017564eaacd5212e4d0fa1c01d – < 1cb9c7bc9025c637564fabc7fcc3c9343949e310
- affected 56e62a73702836017564eaacd5212e4d0fa1c01d – < 7a5260fbc6e79a1595328ec5c6aa3f937504a1f0
- affected 56e62a73702836017564eaacd5212e4d0fa1c01d – < f8c444b918d639e1f9a621ee20fe481c1d10dfc4
- affected 56e62a73702836017564eaacd5212e4d0fa1c01d – < 87776f02449e3bded95b2ccbd6b012e9ae64e6f3
- affected 56e62a73702836017564eaacd5212e4d0fa1c01d – < 4d05dd18d867d58c6952a3bc260d244899da7256
- affected 56e62a73702836017564eaacd5212e4d0fa1c01d – < 48b8814e25d073dd84daf990a879a820bad2bcbd
- affected 5.12
- unaffected < 5.12
- unaffected 5.15.203 – ≤ 5.15.*
- unaffected 6.1.168 – ≤ 6.1.*
- unaffected 6.6.131 – ≤ 6.6.*
- unaffected 6.12.80 – ≤ 6.12.*
- unaffected 6.18.21 – ≤ 6.18.*
- unaffected 6.19.11 – ≤ 6.19.*
- unaffected 7.0 – ≤ *
References
References7
- https://git.kernel.org/stable/c/3c3b97064764899c39a0abbd35a6caa031e70333 (opens in a new tab)
- https://git.kernel.org/stable/c/1cb9c7bc9025c637564fabc7fcc3c9343949e310 (opens in a new tab)
- https://git.kernel.org/stable/c/7a5260fbc6e79a1595328ec5c6aa3f937504a1f0 (opens in a new tab)
- https://git.kernel.org/stable/c/f8c444b918d639e1f9a621ee20fe481c1d10dfc4 (opens in a new tab)
- https://git.kernel.org/stable/c/87776f02449e3bded95b2ccbd6b012e9ae64e6f3 (opens in a new tab)
- https://git.kernel.org/stable/c/4d05dd18d867d58c6952a3bc260d244899da7256 (opens in a new tab)
- https://git.kernel.org/stable/c/48b8814e25d073dd84daf990a879a820bad2bcbd (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-2026-24846 (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-2026-31483)Record last updated .