Medium 5.5Published Apr 22, 2026

CVE-2026-31483s390/syscalls: Add spectre boundary for syscall dispatch table

Updated under an hour ago (Oct 26, 2026, 3:00 PM ET)

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Exploited in the last 30 days

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.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: May 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	56e62a73702836017564eaacd5212e4d0fa1c01d builds before 3c3b97064764899c39a0abbd35a6caa031e70333; 56e62a73702836017564eaacd5212e4d0fa1c01d builds before 1cb9c7bc9025c637564fabc7fcc3c9343949e310; 56e62a73702836017564eaacd5212e4d0fa1c01d builds before 7a5260fbc6e79a1595328ec5c6aa3f937504a1f0; from 56e62a73702836017564eaacd5212e4d0fa1c01d before f8c444b918d639e1f9a621ee20fe481c1d10dfc4; from 56e62a73702836017564eaacd5212e4d0fa1c01d before 87776f02449e3bded95b2ccbd6b012e9ae64e6f3; 56e62a73702836017564eaacd5212e4d0fa1c01d builds before 4d05dd18d867d58c6952a3bc260d244899da7256; 56e62a73702836017564eaacd5212e4d0fa1c01d builds before 48b8814e25d073dd84daf990a879a820bad2bcbd	CNA record
linux linux_kernel linux:linux_kernel	from 5.12.1 before 5.15.203; from 5.16 before 6.1.168; from 6.2 before 6.6.131; from 6.7 before 6.12.80; from 6.13 before 6.18.21; from 6.19 before 6.19.11; 5.12; 7.0; and 6 more ranges	NVD

References

References

https://git.kernel.org/stable/c/3c3b97064764899c39a0abbd35a6caa031e70333	patch
https://git.kernel.org/stable/c/1cb9c7bc9025c637564fabc7fcc3c9343949e310	patch
https://git.kernel.org/stable/c/7a5260fbc6e79a1595328ec5c6aa3f937504a1f0	patch
https://git.kernel.org/stable/c/f8c444b918d639e1f9a621ee20fe481c1d10dfc4	patch
https://git.kernel.org/stable/c/87776f02449e3bded95b2ccbd6b012e9ae64e6f3	patch
https://git.kernel.org/stable/c/4d05dd18d867d58c6952a3bc260d244899da7256	patch
https://git.kernel.org/stable/c/48b8814e25d073dd84daf990a879a820bad2bcbd	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.