In the Linux kernel, the following vulnerability has been resolved: udp: fix potential use-after-free in tunnel segmentation __skb_udp_…
CVE-2026-74705 · published 22 Aug 2026
How serious is it
- Severity: critical, CVSS score 10 out of 10.
- No exploit prediction (EPSS) score yet.
- Not on the CISA list of exploited vulnerabilities.
- No public exploit in Exploit-DB.
Is your app affected by CVE-2026-74705?
Paste this prompt into Claude Code, Cursor or any AI coding tool: it runs a free Shippable scan of your project and fixes what it finds. Built with Lovable, Bolt or v0? Scan your live app. Or upload your package file.
Who is affected
- Linux Linux: 4.6
How to check
- Find out whether you run the affected product and which version, then compare it with the versions above.
How to fix
Copies a prompt for Claude Code, Cursor or Codex that asks it to check whether you run this product.
- Apply the vendor's update or mitigation from the references below. If there is none yet, limit exposure of the affected service until there is.
- If a vulnerable version was live, check your logs and rotate the secrets that server could read.
The advisory
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the saved UDP header pointer is no longer valid.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.
Check your whole app
Dependencies are only half of it. Free and read-only: before you push, run npx shippable-dev scan localhost:3000 in your project folder, no account needed. For your live app, you prove it's yours with a one-line tag first.
References
- git.kernel.org/stable/c/19d89b13a43640b2da2f277ee462d919d988cb6f
- git.kernel.org/stable/c/1ae134c012e10384cdac420b5cc6e0615cde0b55
- git.kernel.org/stable/c/5161e67c561c4f28a5d9335a6e859b02511de92b
- git.kernel.org/stable/c/588d4a6795d99d080f74ef0b5f391ea8c453ae5d
- git.kernel.org/stable/c/64d322c288577793eedd352b96ef75234ed380fe
- git.kernel.org/stable/c/6a733a38b983d8c2e222f13968209010cf44de87
- git.kernel.org/stable/c/b3df61bb745eb5201eac22679a2839d4ccbf3442
- git.kernel.org/stable/c/d0f86fb36eb260abd10007b62c9dcc1028e03e61
Merged from NVD. Last updated 24 Oct 2026. All vulnerabilities · RSS · JSON