# CVE-2026-31542: x86/platform/uv: Handle deconfigured sockets

Status: published. Published: 2026-04-24. Updated: 2026-11-05.

In the Linux kernel, the following vulnerability has been resolved:

x86/platform/uv: Handle deconfigured sockets

When a socket is deconfigured, it's mapped to SOCK_EMPTY (0xffff). This causes
a panic while allocating UV hub info structures.

Fix this by using NUMA_NO_NODE, allowing UV hub info structures to be
allocated on valid nodes.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Linux / Linux: ≥ 8a50c58519271dd24ba760bb282875f6ad66ee71; < c51957601d32c0d195bce0b9345dfe93ef5728cc (affected, git); ≥ 8a50c58519271dd24ba760bb282875f6ad66ee71; < 9956d4892e78812246336c7ea51f5aa62018049e (affected, git); ≥ 8a50c58519271dd24ba760bb282875f6ad66ee71; < 79f0faf81d3bbbe5f07bf6892450d3740a1b290d (affected, git); ≥ 8a50c58519271dd24ba760bb282875f6ad66ee71; < c1cf2218d2fa40a49921a7460981e5faab26f04e (affected, git); ≥ 8a50c58519271dd24ba760bb282875f6ad66ee71; < 1f6aa5bbf1d0f81a8a2aafc16136e7dd9a609ff3 (affected, git). Source: CNA: Linux
- Linux / Linux: 6.5 (affected); ≥ 0; < 6.5 (unaffected, semver); ≥ 6.6.130; ≤ 6.6.* (unaffected, semver); ≥ 6.12.78; ≤ 6.12.* (unaffected, semver); ≥ 6.18.20; ≤ 6.18.* (unaffected, semver); ≥ 6.19.10; ≤ 6.19.* (unaffected, semver); ≥ 7.0; ≤ * (unaffected, original_commit_for_fix). Source: CNA: Linux

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: 0.12% as of 2026-11-05; percentile 1.99%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: Not reported

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://git.kernel.org/stable/c/c51957601d32c0d195bce0b9345dfe93ef5728cc (CNA: Linux)

- https://git.kernel.org/stable/c/9956d4892e78812246336c7ea51f5aa62018049e (CNA: Linux)

- https://git.kernel.org/stable/c/79f0faf81d3bbbe5f07bf6892450d3740a1b290d (CNA: Linux)

- https://git.kernel.org/stable/c/c1cf2218d2fa40a49921a7460981e5faab26f04e (CNA: Linux)

- https://git.kernel.org/stable/c/1f6aa5bbf1d0f81a8a2aafc16136e7dd9a609ff3 (CNA: Linux)

## Provenance

- CNA: Linux: https://www.cve.org/CVERecord?id=CVE-2026-31542; retrieved 2026-11-05; source updated 2026-11-05

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-31542; retrieved 2026-11-05; source updated Not reported

Revision: ba97fc03719087f73c694b7e784eed18bb1f93017d357ddc8acb504a6bad45e6

Canonical: https://y2.dev/cve/CVE-2026-31542

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