In the Linux kernel, the following vulnerability has been resolved: gue: validate REMCSUM private option length GUE private flags can i…
CVE-2026-72351 · published 15 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-2026-72351?
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: 3.19
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:
gue: validate REMCSUM private option length
GUE private flags can indicate that remote checksum offload metadata is
present. The private flags field itself is accounted for by
guehdr_flags_len(), but guehdr_priv_flags_len() currently returns 0 even
when GUE_PFLAG_REMCSUM is set.
This lets a packet with only the private flags field pass
validate_gue_flags(), after which gue_remcsum() and gue_gro_remcsum()
read the missing REMCSUM start/offset fields from the following bytes.
Account for GUE_PLEN_REMCSUM when GUE_PFLAG_REMCSUM is present so that
malformed packets are rejected during option validation.
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/158b9995d3c87f3b93f5c22df54a12e12a3438b3
- git.kernel.org/stable/c/2a99224c120823987e4d829726f4ecb33e03fc1e
- git.kernel.org/stable/c/2c4de9988e9ddc760b750d6b6e701c35ff60ad14
- git.kernel.org/stable/c/4a4a1d41c6e901e773bcf795f562a47fa71f692a
- git.kernel.org/stable/c/61e78679c7c9ca685bff58e4b6348304dc60aafd
- git.kernel.org/stable/c/7c6876ec1b227261b51803f784c7be1b2242a1a0
- git.kernel.org/stable/c/d335dcc6f521571d57117b8deeebc940836e5450
- git.kernel.org/stable/c/f618cbe9b24cd0202004d2db781d5f80ab77037f
Merged from NVD. Last updated 23 Oct 2026. All vulnerabilities · RSS · JSON