What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-24 · updated 2026-06-17

Description

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.

Affected products

• Linux kernel: from 6.5 before 6.6.130; from 6.7 before 6.12.78; from 6.13 before 6.18.20; from 6.19 before 6.19.10; 7.0-rc1, 7.0-rc2, 7.0-rc3, 7.0-rc4 — fixed in 6.12.78, 6.18.20, 6.19.10, 6.6.130

How to fix

Upgrade to a fixed version: Linux kernel 6.12.78, 6.18.20, 6.19.10, 6.6.130. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1f6aa5bbf1d0f81a8a2aafc16136e7dd9a609ff3
• https://git.kernel.org/stable/c/79f0faf81d3bbbe5f07bf6892450d3740a1b290d
• https://git.kernel.org/stable/c/9956d4892e78812246336c7ea51f5aa62018049e
• https://git.kernel.org/stable/c/c1cf2218d2fa40a49921a7460981e5faab26f04e
• https://git.kernel.org/stable/c/c51957601d32c0d195bce0b9345dfe93ef5728cc

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