{"id":"CVE-2026-72351","revision":"47354adbc342425a8aaa30f159c9a3ea","records":[{"revision":"47354adbc342425a8aaa30f159c9a3ea","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-72351","aliases":[],"title":"gue: validate REMCSUM private option length","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ngue: validate REMCSUM private option length\n\nGUE private flags can indicate that remote checksum offload metadata is\npresent. The private flags field itself is accounted for by\nguehdr_flags_len(), but guehdr_priv_flags_len() currently returns 0 even\nwhen GUE_PFLAG_REMCSUM is set.\n\nThis lets a packet with only the private flags field pass\nvalidate_gue_flags(), after which gue_remcsum() and gue_gro_remcsum()\nread the missing REMCSUM start/offset fields from the following bytes.\n\nAccount for GUE_PLEN_REMCSUM when GUE_PFLAG_REMCSUM is present so that\nmalformed packets are rejected during option validation.","state":0,"publishedAt":"2026-08-15T05:55:54.15+00:00","modifiedAt":"2026-10-16T18:55:19.979+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"include/net/gue.h\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"c1aa8347e73e4092411fbd96cc59531fb7e76d04\",\n                            \"lessThan\": \"158b9995d3c87f3b93f5c22df54a12e12a3438b3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c1aa8347e73e4092411fbd96cc59531fb7e76d04\",\n                            \"lessThan\": \"7c6876ec1b227261b51803f784c7be1b2242a1a0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c1aa8347e73e4092411fbd96cc59531fb7e76d04\",\n                            \"lessThan\": \"2c4de9988e9ddc760b750d6b6e701c35ff60ad14\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c1aa8347e73e4092411fbd96cc59531fb7e76d04\",\n                            \"lessThan\": \"2a99224c120823987e4d829726f4ecb33e03fc1e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c1aa8347e73e4092411fbd96cc59531fb7e76d04\",\n                            \"lessThan\": \"61e78679c7c9ca685bff58e4b6348304dc60aafd\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c1aa8347e73e4092411fbd96cc59531fb7e76d04\",\n                            \"lessThan\": \"4a4a1d41c6e901e773bcf795f562a47fa71f692a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c1aa8347e73e4092411fbd96cc59531fb7e76d04\",\n                            \"lessThan\": \"f618cbe9b24cd0202004d2db781d5f80ab77037f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c1aa8347e73e4092411fbd96cc59531fb7e76d04\",\n                            \"lessThan\": \"d335dcc6f521571d57117b8deeebc940836e5450\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"include/net/gue.h\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"3.19\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"3.19\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.261\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.212\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.178\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.145\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.97\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.40\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.5\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8,"severity":"CRITICAL"}],"references":["https://git.kernel.org/stable/c/158b9995d3c87f3b93f5c22df54a12e12a3438b3","https://git.kernel.org/stable/c/7c6876ec1b227261b51803f784c7be1b2242a1a0","https://git.kernel.org/stable/c/2c4de9988e9ddc760b750d6b6e701c35ff60ad14","https://git.kernel.org/stable/c/2a99224c120823987e4d829726f4ecb33e03fc1e","https://git.kernel.org/stable/c/61e78679c7c9ca685bff58e4b6348304dc60aafd","https://git.kernel.org/stable/c/4a4a1d41c6e901e773bcf795f562a47fa71f692a","https://git.kernel.org/stable/c/f618cbe9b24cd0202004d2db781d5f80ab77037f","https://git.kernel.org/stable/c/d335dcc6f521571d57117b8deeebc940836e5450"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-72351","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-72351","identifiers":["CVE-2026-72351"]},"retained":false,"historicalAffected":[]}],"coverage":[]}