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CVE PROGRAM SOURCE RECORD10.0 Critical

CVE-2026-74705

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

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Status
Published
Published
Updated
Assigning organization
Linux

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head, the saved UDP header pointer is no longer valid.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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • dbef491ebe7f3a4fb1b9111878b86a426fd540b7 to < 6a733a38b983d8c2e222f13968209010cf44de87affected
  • dbef491ebe7f3a4fb1b9111878b86a426fd540b7 to < 19d89b13a43640b2da2f277ee462d919d988cb6faffected
  • dbef491ebe7f3a4fb1b9111878b86a426fd540b7 to < b3df61bb745eb5201eac22679a2839d4ccbf3442affected
  • dbef491ebe7f3a4fb1b9111878b86a426fd540b7 to < 1ae134c012e10384cdac420b5cc6e0615cde0b55affected
  • dbef491ebe7f3a4fb1b9111878b86a426fd540b7 to < 5161e67c561c4f28a5d9335a6e859b02511de92baffected
  • dbef491ebe7f3a4fb1b9111878b86a426fd540b7 to < 64d322c288577793eedd352b96ef75234ed380feaffected
  • dbef491ebe7f3a4fb1b9111878b86a426fd540b7 to < 588d4a6795d99d080f74ef0b5f391ea8c453ae5daffected
  • dbef491ebe7f3a4fb1b9111878b86a426fd540b7 to < d0f86fb36eb260abd10007b62c9dcc1028e03e61affected

Linux Linux

Default version status: affected

  • 4.6affected
  • 0 to < 4.6unaffected
  • 5.10.265 to ≤ 5.10.*unaffected
  • 5.15.216 to ≤ 5.15.*unaffected
  • 6.1.183 to ≤ 6.1.*unaffected
  • 6.6.152 to ≤ 6.6.*unaffected
  • 6.12.104 to ≤ 6.12.*unaffected
  • 6.18.45 to ≤ 6.18.*unaffected
  • 7.1.9 to ≤ 7.1.*unaffected
  • 7.2 to ≤ *unaffected

References