CVE-2026-72351
Linux kernel vulnerability
- Published15 Aug 2026
Description
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.
CVSS 3.1 breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HRemediation
No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.
References
- https://git.kernel.org/stable/c/158b9995d3c87f3b93f5c22df54a12e12a3438b3
- https://git.kernel.org/stable/c/2a99224c120823987e4d829726f4ecb33e03fc1e
- https://git.kernel.org/stable/c/2c4de9988e9ddc760b750d6b6e701c35ff60ad14
- https://git.kernel.org/stable/c/4a4a1d41c6e901e773bcf795f562a47fa71f692a
- https://git.kernel.org/stable/c/61e78679c7c9ca685bff58e4b6348304dc60aafd
- https://git.kernel.org/stable/c/7c6876ec1b227261b51803f784c7be1b2242a1a0
- https://git.kernel.org/stable/c/d335dcc6f521571d57117b8deeebc940836e5450
- https://git.kernel.org/stable/c/f618cbe9b24cd0202004d2db781d5f80ab77037f
Frequently asked
Is CVE-2026-72351 being actively exploited?
CVE-2026-72351 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.76%.
How severe is CVE-2026-72351?
CVE-2026-72351 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.76% probability of exploitation.
How do I fix CVE-2026-72351?
Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.
How Secuno handles this
Secuno correlates vulnerabilities like CVE-2026-72351 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.
Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.