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.

Metrics

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.0022.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
Linux
  • Linux Kernel

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Vendors Products
References
Link Providers
https://git.kernel.org/stable/c/158b9995d3c87f3b93f5c22df54a12e12a3438b3 cve-icon cve-icon
https://git.kernel.org/stable/c/2a99224c120823987e4d829726f4ecb33e03fc1e cve-icon cve-icon
https://git.kernel.org/stable/c/2c4de9988e9ddc760b750d6b6e701c35ff60ad14 cve-icon cve-icon
https://git.kernel.org/stable/c/4a4a1d41c6e901e773bcf795f562a47fa71f692a cve-icon cve-icon
https://git.kernel.org/stable/c/61e78679c7c9ca685bff58e4b6348304dc60aafd cve-icon cve-icon
https://git.kernel.org/stable/c/7c6876ec1b227261b51803f784c7be1b2242a1a0 cve-icon cve-icon
https://git.kernel.org/stable/c/d335dcc6f521571d57117b8deeebc940836e5450 cve-icon cve-icon
https://git.kernel.org/stable/c/f618cbe9b24cd0202004d2db781d5f80ab77037f cve-icon cve-icon
History

Sat, 15 Aug 2026 11:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-20

Sat, 15 Aug 2026 06:00:00 +0000

Type Values Removed Values Added
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.
Title gue: validate REMCSUM private option length
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-08-15T05:55:54.150Z

Reserved: 2026-08-09T03:40:39.921Z

Link: CVE-2026-72351

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-15T06:22:08.520

Modified: 2026-08-15T06:22:08.520

Link: CVE-2026-72351

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-15T11:00:05Z