# CVE-2026-31483

> Vulnerability · severity: **MEDIUM** (CVSS 5.5).

## 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.

## Key facts

- **CVE ID:** CVE-2026-31483
- **Published:** 2026-04-22
- **CVSS severity:** MEDIUM
- **CVSS base score:** 5.5
- **CWE codes:** NVD-CWE-noinfo

## Affected products

- `linux:linux_kernel`

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-31483

## Citation

> AI Analytics. CVE-2026-31483. Retrieved 2026-07-20 from https://api.ai-analytics.org/cve/CVE-2026-31483. Derived from NIST NVD. Licensed CC0.

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