{"id":"CVE-2026-31407","revision":"154b223f6c4d4825b15b54617a6f4692","records":[{"revision":"154b223f6c4d4825b15b54617a6f4692","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-31407","aliases":[],"title":"netfilter: conntrack: add missing netlink policy validations","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: conntrack: add missing netlink policy validations\n\nHyunwoo Kim reports out-of-bounds access in sctp and ctnetlink.\n\nThese attributes are used by the kernel without any validation.\nExtend the netlink policies accordingly.\n\nQuoting the reporter:\n  nlattr_to_sctp() assigns the user-supplied CTA_PROTOINFO_SCTP_STATE\n  value directly to ct->proto.sctp.state without checking that it is\n  within the valid range. [..]\n\n  and: ... with exp->dir = 100, the access at\n  ct->master->tuplehash[100] reads 5600 bytes past the start of a\n  320-byte nf_conn object, causing a slab-out-of-bounds read confirmed by\n  UBSAN.","state":0,"publishedAt":"2026-04-06T07:38:19.712+00:00","modifiedAt":"2026-10-19T18:35:47.097+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/netfilter/nf_conntrack_netlink.c\",\n                        \"net/netfilter/nf_conntrack_proto_sctp.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"a258860e01b80e8f554a4ab1a6c95e6042eb8b73\",\n                            \"lessThan\": \"e7b5766693477c52424cc6c79dd30a7a9c7db52c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a258860e01b80e8f554a4ab1a6c95e6042eb8b73\",\n                            \"lessThan\": \"78bba9f73942aa7dca47d817d8cec0fb9b443b70\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a258860e01b80e8f554a4ab1a6c95e6042eb8b73\",\n                            \"lessThan\": \"be88a337bf07afb1ee173f1099294d1b7ab3fefe\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a258860e01b80e8f554a4ab1a6c95e6042eb8b73\",\n                            \"lessThan\": \"c5e918390002edf0cff80a0e7ce1f86f16a9507c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a258860e01b80e8f554a4ab1a6c95e6042eb8b73\",\n                            \"lessThan\": \"9174d28f3f15d8c4962f5980c0be167633880443\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a258860e01b80e8f554a4ab1a6c95e6042eb8b73\",\n                            \"lessThan\": \"67c53c1978cef3c504237275e39c857e2f6af56e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a258860e01b80e8f554a4ab1a6c95e6042eb8b73\",\n                            \"lessThan\": \"0fbae1e74493d5a160a70c51aeba035d8266ea7d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a258860e01b80e8f554a4ab1a6c95e6042eb8b73\",\n                            \"lessThan\": \"f900e1d77ee0ef87bfb5ab3fe60f0b3d8ad5ba05\",\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/netfilter/nf_conntrack_netlink.c\",\n                        \"net/netfilter/nf_conntrack_proto_sctp.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"2.6.27\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"2.6.27\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.258\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.209\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.175\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.136\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.83\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.24\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.19.10\",\n                            \"lessThanOrEqual\": \"6.19.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","score":7.1,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/e7b5766693477c52424cc6c79dd30a7a9c7db52c","https://git.kernel.org/stable/c/78bba9f73942aa7dca47d817d8cec0fb9b443b70","https://git.kernel.org/stable/c/be88a337bf07afb1ee173f1099294d1b7ab3fefe","https://git.kernel.org/stable/c/c5e918390002edf0cff80a0e7ce1f86f16a9507c","https://git.kernel.org/stable/c/9174d28f3f15d8c4962f5980c0be167633880443","https://git.kernel.org/stable/c/67c53c1978cef3c504237275e39c857e2f6af56e","https://git.kernel.org/stable/c/0fbae1e74493d5a160a70c51aeba035d8266ea7d","https://git.kernel.org/stable/c/f900e1d77ee0ef87bfb5ab3fe60f0b3d8ad5ba05"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-31407","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-31407","identifiers":["CVE-2026-31407"]},"retained":false,"historicalAffected":[]}],"coverage":[]}