In the Linux kernel, the following vulnerability has been resolved: vxlan: re-fetch eth header after route_shortcircuit() Before route_…
CVE-2026-80681 · published 28 Aug 2026
How serious is it
- Severity: critical, CVSS score 9.8 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-2026-80681?
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: 3.10
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:
vxlan: re-fetch eth header after route_shortcircuit()
Before route_shortcircuit(), the eth header pointer is cached from eth_hdr(skb).
Inside route_shortcircuit(), pskb_may_pull() can be called, which may
reallocate skb->head.
In this case, returning to vxlan_xmit() leaves the cached eth pointer pointing to
freed memory, leading to a use-after-free when dereferencing eth->h_dest.
Fix this by updating eth = eth_hdr(skb) after calling route_shortcircuit().
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/1235e017aa11cf01e91b613c4c5ed6aa28934fff
- git.kernel.org/stable/c/1395a676ec15a0a02a2a6d86602324f2d5fd41d5
- git.kernel.org/stable/c/1511631b7cfc4152b10a0a9d04c7a0bf2ddf4585
- git.kernel.org/stable/c/1b7f7b653e3557690047c62f03b80a24ea5a58a5
- git.kernel.org/stable/c/2355c8c26d2aa1b4385b369e67202e47d460d555
- git.kernel.org/stable/c/6375093eb45cd7d89f1945f939eeae3b29d79f56
- git.kernel.org/stable/c/bf045341dfb3e767f0ff94cf240ce3c371973bd4
- git.kernel.org/stable/c/c9dceac9e1c7c772c43c732fc0d325e72835801a
Merged from NVD. Last updated 24 Oct 2026. All vulnerabilities · RSS · JSON