{"id":"CVE-2026-80586","revision":"4b8cf3a73eac410bbaf145b8ba72f27b","records":[{"revision":"4b8cf3a73eac410bbaf145b8ba72f27b","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-80586","aliases":[],"title":"mptcp: options: reset DSS fields in case of unexpected size","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: options: reset DSS fields in case of unexpected size\n\nA remote peer could send a malformed DSS with a wrong size, followed by\nanother DSS or MPC + Data. In this case, the first suboption will be\nignored, but leaving some fields written, which could lead to\ninconsistency or access uninitialized data.\n\nExplicitly reset the fields that could have been modified in case of\nunexpected size.","state":0,"publishedAt":"2026-08-26T14:37:41.493+00:00","modifiedAt":"2026-10-16T19:26:28.632+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                        \"net/mptcp/options.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"648ef4b88673dadb8463bf0d4b10fbf33d55def8\",\n                            \"lessThan\": \"15e35fdad7a5576bf3f1c8d688877aeb5d1b506b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"648ef4b88673dadb8463bf0d4b10fbf33d55def8\",\n                            \"lessThan\": \"b1256090816ec46011601e084be580731df58fc7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"648ef4b88673dadb8463bf0d4b10fbf33d55def8\",\n                            \"lessThan\": \"192878df582c51d440bf7b91a15f297f29f2b596\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"648ef4b88673dadb8463bf0d4b10fbf33d55def8\",\n                            \"lessThan\": \"26dac5c9ffb20812b475fdf253eb04fab99cff3b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"648ef4b88673dadb8463bf0d4b10fbf33d55def8\",\n                            \"lessThan\": \"4e80eff5c1c893aca2ac1d202f0b256d2e52ecde\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"648ef4b88673dadb8463bf0d4b10fbf33d55def8\",\n                            \"lessThan\": \"1fade1b2ac5b1a4948e538fae7313bea57b5ac36\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"648ef4b88673dadb8463bf0d4b10fbf33d55def8\",\n                            \"lessThan\": \"27ed642a4e7e4b5df4b8522c72c457a67e052493\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"648ef4b88673dadb8463bf0d4b10fbf33d55def8\",\n                            \"lessThan\": \"35772b4981f38ba8059372cde8753e8e477e98ec\",\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                        \"net/mptcp/options.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.6\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.6\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.266\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.217\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.184\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.153\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.105\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.46\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.10\",\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/15e35fdad7a5576bf3f1c8d688877aeb5d1b506b","https://git.kernel.org/stable/c/b1256090816ec46011601e084be580731df58fc7","https://git.kernel.org/stable/c/192878df582c51d440bf7b91a15f297f29f2b596","https://git.kernel.org/stable/c/26dac5c9ffb20812b475fdf253eb04fab99cff3b","https://git.kernel.org/stable/c/4e80eff5c1c893aca2ac1d202f0b256d2e52ecde","https://git.kernel.org/stable/c/1fade1b2ac5b1a4948e538fae7313bea57b5ac36","https://git.kernel.org/stable/c/27ed642a4e7e4b5df4b8522c72c457a67e052493","https://git.kernel.org/stable/c/35772b4981f38ba8059372cde8753e8e477e98ec"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80586","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-80586","identifiers":["CVE-2026-80586"]},"retained":false,"historicalAffected":[]}],"coverage":[]}