CVE-2026-74705

CVE-2026-74705

Critical · published August 22, 2026

CVSS v3.1
10.0
EPSS
1%
Percentile
41.9
In the wild
Unconfirmed
What it is

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the saved UDP header pointer is no longer valid.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.

The record
Technical detail
CVSS v3.1
10.0 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00500 · 41.9th percentile
Published
2026-08-22T20:16Z
References (8)
https://git.kernel.org/stable/c/19d89b13a43640b2da2f277ee462d919d988cb6f · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1ae134c012e10384cdac420b5cc6e0615cde0b55 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5161e67c561c4f28a5d9335a6e859b02511de92b · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/588d4a6795d99d080f74ef0b5f391ea8c453ae5d · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/64d322c288577793eedd352b96ef75234ed380fe · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6a733a38b983d8c2e222f13968209010cf44de87 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b3df61bb745eb5201eac22679a2839d4ccbf3442 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d0f86fb36eb260abd10007b62c9dcc1028e03e61 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67
EPSS history
Timeline
  • 22 AUG 15:33Z
    udp: fix potential use-after-free in tunnel segmentation
    cvelistv5