CVE-2026-31542 PUBLISHED

x86/platform/uv: Handle deconfigured sockets

Assigner: Linux
Reserved: 09.03.2026 Published: 24.04.2026 Updated: 24.04.2026

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.

Vendor	Linux
Product	Linux
Versions	Default: unaffected affected from 8a50c58519271dd24ba760bb282875f6ad66ee71 to c51957601d32c0d195bce0b9345dfe93ef5728cc (excl.) affected from 8a50c58519271dd24ba760bb282875f6ad66ee71 to 9956d4892e78812246336c7ea51f5aa62018049e (excl.) affected from 8a50c58519271dd24ba760bb282875f6ad66ee71 to 79f0faf81d3bbbe5f07bf6892450d3740a1b290d (excl.) affected from 8a50c58519271dd24ba760bb282875f6ad66ee71 to c1cf2218d2fa40a49921a7460981e5faab26f04e (excl.) affected from 8a50c58519271dd24ba760bb282875f6ad66ee71 to 1f6aa5bbf1d0f81a8a2aafc16136e7dd9a609ff3 (excl.)

Vendor	Linux
Product	Linux
Versions	Default: affected Version 6.5 is affected unaffected from 0 to 6.5 (excl.) unaffected from 6.6.130 to 6.6.* (incl.) unaffected from 6.12.78 to 6.12.* (incl.) unaffected from 6.18.20 to 6.18.* (incl.) unaffected from 6.19.10 to 6.19.* (incl.) unaffected from 7.0 to * (incl.)