CVE-2026-74705

CriticalCVSS 10.0/10Last modified Oct 16, 2026

Description

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

udp: fix potential use-after-free in tunnel segmentation

__skb_udp_tunnel_segment() gets the UDP header before ensuring the tunnel header is in the skb head. If the pull reallocates skb->head, the saved UDP header pointer is no longer valid.

Get the UDP header after the pull to avoid a potential use-after-free.

Metrics

CVSS 3.1 10.0/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

VendorProductVersions
LinuxLinux>= dbef491ebe7f3a4fb1b9111878b86a426fd540b7, < 6a733a38b983d8c2e222f13968209010cf44de87; >= dbef491ebe7f3a4fb1b9111878b86a426fd540b7, < 19d89b13a43640b2da2f277ee462d919d988cb6f; >= dbef491ebe7f3a4fb1b9111878b86a426fd540b7, < b3df61bb745eb5201eac22679a2839d4ccbf3442; >= dbef491ebe7f3a4fb1b9111878b86a426fd540b7, < 1ae134c012e10384cdac420b5cc6e0615cde0b55; >= dbef491ebe7f3a4fb1b9111878b86a426fd540b7, < 5161e67c561c4f28a5d9335a6e859b02511de92b; >= dbef491ebe7f3a4fb1b9111878b86a426fd540b7, < 64d322c288577793eedd352b96ef75234ed380fe; >= dbef491ebe7f3a4fb1b9111878b86a426fd540b7, < 588d4a6795d99d080f74ef0b5f391ea8c453ae5d; >= dbef491ebe7f3a4fb1b9111878b86a426fd540b7, < d0f86fb36eb260abd10007b62c9dcc1028e03e61
LinuxLinux4.6

References

Timeline

Published
Aug 22, 2026
Last modified
Oct 16, 2026
NVD status
Received

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CVE-2026-74705: Critical severity, CVSS 10.0 | Vulnix