CVE-2026-31483
Medium
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.
SeverityMedium
CVSS5.5
Exploit probability2. percentile0.1%
Product
Linux Kernel
PublishedApr 22, 2026
First seenApr 22, 2026
How to fix
Update
- linux linux_kernel5.15.203, 6.1.168, 6.6.131, 6.12.80, 6.18.21, 6.19.11 or later
Patches
- git.kernel.org/stable/c/1cb9c7bc9025c637564fabc7fcc3c9343949e310
- git.kernel.org/stable/c/3c3b97064764899c39a0abbd35a6caa031e70333
- git.kernel.org/stable/c/48b8814e25d073dd84daf990a879a820bad2bcbd
- git.kernel.org/stable/c/4d05dd18d867d58c6952a3bc260d244899da7256
- git.kernel.org/stable/c/7a5260fbc6e79a1595328ec5c6aa3f937504a1f0
- git.kernel.org/stable/c/87776f02449e3bded95b2ccbd6b012e9ae64e6f3
- git.kernel.org/stable/c/f8c444b918d639e1f9a621ee20fe481c1d10dfc4
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.12.1 ≤ v < 5.15.203, 5.16 ≤ v < 6.1.168, 6.2 ≤ v < 6.6.131, 6.7 ≤ v < 6.12.80, 6.13 ≤ v < 6.18.21, 6.19 ≤ v < 6.19.11, 5.12, 7.0 | 5.15.203, 6.1.168, 6.6.131, 6.12.80, 6.18.21, 6.19.11 |
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