CVE-2026-31483
MEDIUM severity · CVSS 5.5
5.5CVSS MEDIUM
Summary
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.
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Official patch: https://git.kernel.org/stable/c/1cb9c7bc9025c637564fabc7fcc3c9343949e310 ↗
Additional information
- NVD record
- https://git.kernel.org/stable/c/1cb9c7bc9025c637564fabc7fcc3c9343949e310Patch
- https://git.kernel.org/stable/c/3c3b97064764899c39a0abbd35a6caa031e70333Patch
- https://git.kernel.org/stable/c/48b8814e25d073dd84daf990a879a820bad2bcbdPatch
- https://git.kernel.org/stable/c/4d05dd18d867d58c6952a3bc260d244899da7256Patch
- https://git.kernel.org/stable/c/7a5260fbc6e79a1595328ec5c6aa3f937504a1f0Patch
- https://git.kernel.org/stable/c/87776f02449e3bded95b2ccbd6b012e9ae64e6f3Patch
- https://git.kernel.org/stable/c/f8c444b918d639e1f9a621ee20fe481c1d10dfc4Patch