{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-63922", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.021Z", "datePublished": "2026-07-19T14:55:24.268Z", "dateUpdated": "2026-07-20T13:41:32.124Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-20T13:41:32.124Z"}, "descriptions": [{"lang": "en", "value": "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."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL"}}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ipv6/exthdrs.c"], "versions": [{"version": "a831f5bbc89a9978795504be9e1ff412043f8f77", "lessThan": "f8aabed3ff3e986920cf02a2a2785e08e586b234", "status": "affected", "versionType": "git"}, {"version": "a831f5bbc89a9978795504be9e1ff412043f8f77", "lessThan": "1a11eb7431e3d2882f5bd5939c5a9bbc65ccf4d1", "status": "affected", "versionType": "git"}, {"version": "a831f5bbc89a9978795504be9e1ff412043f8f77", "lessThan": "12d957979e4a800167842f1b42be6a606d227ebe", "status": "affected", "versionType": "git"}, {"version": "a831f5bbc89a9978795504be9e1ff412043f8f77", "lessThan": "ff375ed1cba81392346c5bfbf0bb7a13b2946f99", "status": "affected", "versionType": "git"}, {"version": "a831f5bbc89a9978795504be9e1ff412043f8f77", "lessThan": "751db1b802a067b7fff25880f4e9f9152a171538", "status": "affected", "versionType": "git"}, {"version": "a831f5bbc89a9978795504be9e1ff412043f8f77", "lessThan": "9b6dcc0a39fd71752937f0b6b3973e1416085dcf", "status": "affected", "versionType": "git"}, {"version": "a831f5bbc89a9978795504be9e1ff412043f8f77", "lessThan": "f7b52afe3592eae66e160586b45a3f2242972c63", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ipv6/exthdrs.c"], "versions": [{"version": "2.6.19", "status": "affected"}, {"version": "0", "lessThan": "2.6.19", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.210", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.176", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.143", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.93", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.35", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.12", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.19", "versionEndExcluding": "5.15.210"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.19", "versionEndExcluding": "6.1.176"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.19", "versionEndExcluding": "6.6.143"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.19", "versionEndExcluding": "6.12.93"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.19", "versionEndExcluding": "6.18.35"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.19", "versionEndExcluding": "7.0.12"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.19", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/f8aabed3ff3e986920cf02a2a2785e08e586b234"}, {"url": "https://git.kernel.org/stable/c/1a11eb7431e3d2882f5bd5939c5a9bbc65ccf4d1"}, {"url": "https://git.kernel.org/stable/c/12d957979e4a800167842f1b42be6a606d227ebe"}, {"url": "https://git.kernel.org/stable/c/ff375ed1cba81392346c5bfbf0bb7a13b2946f99"}, {"url": "https://git.kernel.org/stable/c/751db1b802a067b7fff25880f4e9f9152a171538"}, {"url": "https://git.kernel.org/stable/c/9b6dcc0a39fd71752937f0b6b3973e1416085dcf"}, {"url": "https://git.kernel.org/stable/c/f7b52afe3592eae66e160586b45a3f2242972c63"}], "title": "ipv6: exthdrs: refresh nh after handling HAO option", "x_generator": {"engine": "bippy-1.2.0"}}}}

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