{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-53221", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.392Z", "datePublished": "2026-06-25T08:39:23.177Z", "dateUpdated": "2026-06-25T08:39:23.177Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-25T08:39:23.177Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nip6_vti: fix incorrect tunnel matching in vti6_tnl_lookup()\n\nIn vti6_tnl_lookup(), when an exact match for a tunnel fails,\nthe code falls back to searching for wildcard tunnels:\n\n- Tunnels matching the packet's local address, with any remote address\n wildcard remote).\n\n- Tunnels matching the packet's remote address, with any local address\n (wildcard local).\n\nHowever, vti6 stores all these different types of tunnels in the same\nhash table (ip6n->tnls_r_l) prone to hash collisions.\n\nThe bug is that the fallback search loops in vti6_tnl_lookup() were\nmissing checks to ensure that the candidate tunnel actually has\na wildcard address."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ipv6/ip6_vti.c"], "versions": [{"version": "fbe68ee87522f6eaa10f9076c0a7117e1613f2f7", "lessThan": "c327fa4fca31415431202e063767a7ae342e19c6", "status": "affected", "versionType": "git"}, {"version": "fbe68ee87522f6eaa10f9076c0a7117e1613f2f7", "lessThan": "fc657ac0767c49839b3ef0b08dc0953ca30883f8", "status": "affected", "versionType": "git"}, {"version": "fbe68ee87522f6eaa10f9076c0a7117e1613f2f7", "lessThan": "47fb3c2b4203556308e64354b3e78f2ce221d646", "status": "affected", "versionType": "git"}, {"version": "fbe68ee87522f6eaa10f9076c0a7117e1613f2f7", "lessThan": "f513f308cc4bdb4530d033431592ffbc29b7fca1", "status": "affected", "versionType": "git"}, {"version": "fbe68ee87522f6eaa10f9076c0a7117e1613f2f7", "lessThan": "90fd4513315ca07da99cfd8549d3e553a7160f0d", "status": "affected", "versionType": "git"}, {"version": "fbe68ee87522f6eaa10f9076c0a7117e1613f2f7", "lessThan": "2abfb19bbb81958714ad1d43ebeb65b30394184b", "status": "affected", "versionType": "git"}, {"version": "fbe68ee87522f6eaa10f9076c0a7117e1613f2f7", "lessThan": "2fc7bc087cc7085368263d9d37bfe9a0bddd6a2d", "status": "affected", "versionType": "git"}, {"version": "fbe68ee87522f6eaa10f9076c0a7117e1613f2f7", "lessThan": "a5c0359f5cbc51a2e2b114d6041e0f3c73f903e9", "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/ip6_vti.c"], "versions": [{"version": "3.19", "status": "affected"}, {"version": "0", "lessThan": "3.19", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.259", "lessThanOrEqual": "5.10.*", "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": "6.12.94", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.36", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.13", "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": "3.19", "versionEndExcluding": "5.10.259"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "5.15.210"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "6.1.176"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "6.6.143"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "6.12.94"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "6.18.36"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "7.0.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/c327fa4fca31415431202e063767a7ae342e19c6"}, {"url": "https://git.kernel.org/stable/c/fc657ac0767c49839b3ef0b08dc0953ca30883f8"}, {"url": "https://git.kernel.org/stable/c/47fb3c2b4203556308e64354b3e78f2ce221d646"}, {"url": "https://git.kernel.org/stable/c/f513f308cc4bdb4530d033431592ffbc29b7fca1"}, {"url": "https://git.kernel.org/stable/c/90fd4513315ca07da99cfd8549d3e553a7160f0d"}, {"url": "https://git.kernel.org/stable/c/2abfb19bbb81958714ad1d43ebeb65b30394184b"}, {"url": "https://git.kernel.org/stable/c/2fc7bc087cc7085368263d9d37bfe9a0bddd6a2d"}, {"url": "https://git.kernel.org/stable/c/a5c0359f5cbc51a2e2b114d6041e0f3c73f903e9"}], "title": "ip6_vti: fix incorrect tunnel matching in vti6_tnl_lookup()", "x_generator": 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{"created": "2026-06-25T11:30:06.464616+00:00", "updated": "2026-06-25T11:30:06.464622+00:00", "vendors": [], "weaknesses": ["CWE-20"]}