{"api_version":"1","generated_at":"2026-06-26T20:56:42+00:00","cve":"CVE-2026-53249","urls":{"html":"https://cve.report/CVE-2026-53249","api":"https://cve.report/api/cve/CVE-2026-53249.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-53249","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-53249"},"summary":{"title":"ipv4: restrict IPOPT_SSRR and IPOPT_LSRR options","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv4: restrict IPOPT_SSRR and IPOPT_LSRR options\n\nThis patch restricts setting Loose Source and Record Route (LSRR)\nand Strict Source and Record Route (SSRR) IP options to users\nwith CAP_NET_RAW capability.\n\nThis prevents unprivileged applications from forcing packets to route\nthrough attacker-controlled nodes to leak TCP ISN and possibly other\nprotocol information.\n\nWhile LSRR and SSRR are commonly filtered in many network environments,\nthey may still be supported and forwarded along some network paths.\n\nRFC 7126 (Recommendations on Filtering of IPv4 Packets Containing\nIPv4 Options) recommend to drop these options in 4.3 and 4.4.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-06-25 09:16:42","updated_at":"2026-06-25 09:16:42"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/8ff85dbabbbfb05e86e6cde31d91ac5782179d4d","name":"https://git.kernel.org/stable/c/8ff85dbabbbfb05e86e6cde31d91ac5782179d4d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a4f3fd6516920988c47ba8d19714985c40c816a1","name":"https://git.kernel.org/stable/c/a4f3fd6516920988c47ba8d19714985c40c816a1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/28f5ad1b4055405eb1616e603fe511ba5e3725e7","name":"https://git.kernel.org/stable/c/28f5ad1b4055405eb1616e603fe511ba5e3725e7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4cd6e9ed49347d3a2fdaaf07e32fb524756dddc2","name":"https://git.kernel.org/stable/c/4cd6e9ed49347d3a2fdaaf07e32fb524756dddc2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2a87c3e8f03ce655ed0ef500d64d5fd924ec3691","name":"https://git.kernel.org/stable/c/2a87c3e8f03ce655ed0ef500d64d5fd924ec3691","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d3915a1f5a4bc0ac911032903c3c6ab8df9fcc7c","name":"https://git.kernel.org/stable/c/d3915a1f5a4bc0ac911032903c3c6ab8df9fcc7c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/00e8845fe3428c69e980dce5071cb3da1d8f7578","name":"https://git.kernel.org/stable/c/00e8845fe3428c69e980dce5071cb3da1d8f7578","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/89343ff12b3178fc236fe531a3603e7c97c68278","name":"https://git.kernel.org/stable/c/89343ff12b3178fc236fe531a3603e7c97c68278","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-53249","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53249","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 4cd6e9ed49347d3a2fdaaf07e32fb524756dddc2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 2a87c3e8f03ce655ed0ef500d64d5fd924ec3691 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 89343ff12b3178fc236fe531a3603e7c97c68278 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 8ff85dbabbbfb05e86e6cde31d91ac5782179d4d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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00:06:14"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/ipv4/ip_options.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"4cd6e9ed49347d3a2fdaaf07e32fb524756dddc2","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"2a87c3e8f03ce655ed0ef500d64d5fd924ec3691","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"89343ff12b3178fc236fe531a3603e7c97c68278","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"8ff85dbabbbfb05e86e6cde31d91ac5782179d4d","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"00e8845fe3428c69e980dce5071cb3da1d8f7578","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"a4f3fd6516920988c47ba8d19714985c40c816a1","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"28f5ad1b4055405eb1616e603fe511ba5e3725e7","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"d3915a1f5a4bc0ac911032903c3c6ab8df9fcc7c","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/ipv4/ip_options.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.12"},{"lessThan":"2.6.12","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.259","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.210","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.176","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.143","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.94","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.36","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.13","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.259","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.210","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.176","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.143","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.94","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.36","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.13","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1","versionStartIncluding":"2.6.12","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv4: restrict IPOPT_SSRR and IPOPT_LSRR options\n\nThis patch restricts setting Loose Source and Record Route (LSRR)\nand Strict Source and Record Route (SSRR) IP options to users\nwith CAP_NET_RAW capability.\n\nThis prevents unprivileged applications from forcing packets to route\nthrough attacker-controlled nodes to leak TCP ISN and possibly other\nprotocol information.\n\nWhile LSRR and SSRR are commonly filtered in many network environments,\nthey may still be supported and forwarded along some network paths.\n\nRFC 7126 (Recommendations on Filtering of IPv4 Packets Containing\nIPv4 Options) recommend to drop these options in 4.3 and 4.4."}],"providerMetadata":{"dateUpdated":"2026-06-25T08:39:41.971Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/4cd6e9ed49347d3a2fdaaf07e32fb524756dddc2"},{"url":"https://git.kernel.org/stable/c/2a87c3e8f03ce655ed0ef500d64d5fd924ec3691"},{"url":"https://git.kernel.org/stable/c/89343ff12b3178fc236fe531a3603e7c97c68278"},{"url":"https://git.kernel.org/stable/c/8ff85dbabbbfb05e86e6cde31d91ac5782179d4d"},{"url":"https://git.kernel.org/stable/c/00e8845fe3428c69e980dce5071cb3da1d8f7578"},{"url":"https://git.kernel.org/stable/c/a4f3fd6516920988c47ba8d19714985c40c816a1"},{"url":"https://git.kernel.org/stable/c/28f5ad1b4055405eb1616e603fe511ba5e3725e7"},{"url":"https://git.kernel.org/stable/c/d3915a1f5a4bc0ac911032903c3c6ab8df9fcc7c"}],"title":"ipv4: restrict IPOPT_SSRR and IPOPT_LSRR options","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-53249","datePublished":"2026-06-25T08:39:41.971Z","dateReserved":"2026-06-09T07:44:35.394Z","dateUpdated":"2026-06-25T08:39:41.971Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-25 09:16:42","lastModifiedDate":"2026-06-25 09:16:42","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"53249","Ordinal":"1","Title":"ipv4: restrict IPOPT_SSRR and IPOPT_LSRR options","CVE":"CVE-2026-53249","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"53249","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv4: restrict IPOPT_SSRR and IPOPT_LSRR options\n\nThis patch restricts setting Loose Source and Record Route (LSRR)\nand Strict Source and Record Route (SSRR) IP options to users\nwith CAP_NET_RAW capability.\n\nThis prevents unprivileged applications from forcing packets to route\nthrough attacker-controlled nodes to leak TCP ISN and possibly other\nprotocol information.\n\nWhile LSRR and SSRR are commonly filtered in many network environments,\nthey may still be supported and forwarded along some network paths.\n\nRFC 7126 (Recommendations on Filtering of IPv4 Packets Containing\nIPv4 Options) recommend to drop these options in 4.3 and 4.4.","Type":"Description","Title":"ipv4: restrict IPOPT_SSRR and IPOPT_LSRR options"}]}}}