{"id":"CVE-2026-63922","revision":"ac7cdab69e214ac1a721fb8a7dad4586","records":[{"revision":"ac7cdab69e214ac1a721fb8a7dad4586","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-63922","aliases":[],"title":"ipv6: exthdrs: refresh nh after handling HAO option","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: exthdrs: refresh nh after handling HAO option\n\nip6_parse_tlv() caches skb_network_header(skb) in nh while walking\nIPv6 TLVs.\n\nipv6_dest_hao() may call pskb_expand_head() for a cloned skb, which can\nmove the skb head and invalidate the cached network header pointer.\nRefresh nh after ipv6_dest_hao() returns so any trailing padding or TLVs\nare parsed from the current skb head.\n\nThis matches the existing pattern used in ip6_parse_tlv() after helpers\nthat can modify skb header storage.","state":0,"publishedAt":"2026-07-19T14:55:24.268+00:00","modifiedAt":"2026-10-19T20:17:56.594+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/ipv6/exthdrs.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"a831f5bbc89a9978795504be9e1ff412043f8f77\",\n                            \"lessThan\": \"b3ac54e5c905f86d22b502eacb5686a282c5659f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a831f5bbc89a9978795504be9e1ff412043f8f77\",\n                            \"lessThan\": \"f8aabed3ff3e986920cf02a2a2785e08e586b234\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a831f5bbc89a9978795504be9e1ff412043f8f77\",\n                            \"lessThan\": \"1a11eb7431e3d2882f5bd5939c5a9bbc65ccf4d1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a831f5bbc89a9978795504be9e1ff412043f8f77\",\n                            \"lessThan\": \"12d957979e4a800167842f1b42be6a606d227ebe\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a831f5bbc89a9978795504be9e1ff412043f8f77\",\n                            \"lessThan\": \"ff375ed1cba81392346c5bfbf0bb7a13b2946f99\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a831f5bbc89a9978795504be9e1ff412043f8f77\",\n                            \"lessThan\": \"751db1b802a067b7fff25880f4e9f9152a171538\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a831f5bbc89a9978795504be9e1ff412043f8f77\",\n                            \"lessThan\": \"9b6dcc0a39fd71752937f0b6b3973e1416085dcf\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a831f5bbc89a9978795504be9e1ff412043f8f77\",\n                            \"lessThan\": \"f7b52afe3592eae66e160586b45a3f2242972c63\",\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/ipv6/exthdrs.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"2.6.19\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"2.6.19\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.259\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.210\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.176\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.143\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.93\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.35\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0.12\",\n                            \"lessThanOrEqual\": \"7.0.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1\",\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/b3ac54e5c905f86d22b502eacb5686a282c5659f","https://git.kernel.org/stable/c/f8aabed3ff3e986920cf02a2a2785e08e586b234","https://git.kernel.org/stable/c/1a11eb7431e3d2882f5bd5939c5a9bbc65ccf4d1","https://git.kernel.org/stable/c/12d957979e4a800167842f1b42be6a606d227ebe","https://git.kernel.org/stable/c/ff375ed1cba81392346c5bfbf0bb7a13b2946f99","https://git.kernel.org/stable/c/751db1b802a067b7fff25880f4e9f9152a171538","https://git.kernel.org/stable/c/9b6dcc0a39fd71752937f0b6b3973e1416085dcf","https://git.kernel.org/stable/c/f7b52afe3592eae66e160586b45a3f2242972c63"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-63922","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-63922","identifiers":["CVE-2026-63922"]},"retained":false,"historicalAffected":[]}],"coverage":[]}