{"api_version":"1","generated_at":"2026-06-27T06:16:38+00:00","cve":"CVE-2026-53236","urls":{"html":"https://cve.report/CVE-2026-53236","api":"https://cve.report/api/cve/CVE-2026-53236.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-53236","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-53236"},"summary":{"title":"tcp: restrict SO_ATTACH_FILTER to priv users","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: restrict SO_ATTACH_FILTER to priv users\n\nThis patch restricts the use of SO_ATTACH_FILTER (cBPF) on TCP sockets\nto users with CAP_NET_ADMIN capability.\n\nThis blocks potential side-channel attack where an unprivileged application\nattaches a filter to leak TCP sequence/acknowledgment numbers.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-06-25 09:16:41","updated_at":"2026-06-25 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Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53236","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 3747de241a66ef2c7032d2cc2b826a47c5fa0f6a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ecfe9171b26ae3eed0cd8bab7a943e9e2c9e51ba git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 82b3e7ce10c53fc12aab8904745603efc74f8c07 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ede69b8f6670600e534591664584f810d7c385f9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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00:07:46"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/core/sock.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"3747de241a66ef2c7032d2cc2b826a47c5fa0f6a","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"ecfe9171b26ae3eed0cd8bab7a943e9e2c9e51ba","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"82b3e7ce10c53fc12aab8904745603efc74f8c07","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"ede69b8f6670600e534591664584f810d7c385f9","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"c68517a3e18e20997808821c5559d0cba4d776c1","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"5d39580f68e6ddeedd15e587282207489dfb3da2","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/core/sock.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":"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":"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\ntcp: restrict SO_ATTACH_FILTER to priv users\n\nThis patch restricts the use of SO_ATTACH_FILTER (cBPF) on TCP sockets\nto users with CAP_NET_ADMIN capability.\n\nThis blocks potential side-channel attack where an unprivileged application\nattaches a filter to leak TCP sequence/acknowledgment numbers."}],"providerMetadata":{"dateUpdated":"2026-06-25T08:39:33.170Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/3747de241a66ef2c7032d2cc2b826a47c5fa0f6a"},{"url":"https://git.kernel.org/stable/c/ecfe9171b26ae3eed0cd8bab7a943e9e2c9e51ba"},{"url":"https://git.kernel.org/stable/c/82b3e7ce10c53fc12aab8904745603efc74f8c07"},{"url":"https://git.kernel.org/stable/c/ede69b8f6670600e534591664584f810d7c385f9"},{"url":"https://git.kernel.org/stable/c/c68517a3e18e20997808821c5559d0cba4d776c1"},{"url":"https://git.kernel.org/stable/c/5d39580f68e6ddeedd15e587282207489dfb3da2"}],"title":"tcp: restrict SO_ATTACH_FILTER to priv users","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-53236","datePublished":"2026-06-25T08:39:33.170Z","dateReserved":"2026-06-09T07:44:35.393Z","dateUpdated":"2026-06-25T08:39:33.170Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-25 09:16:41","lastModifiedDate":"2026-06-25 09:16:41","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"53236","Ordinal":"1","Title":"tcp: restrict SO_ATTACH_FILTER to priv users","CVE":"CVE-2026-53236","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"53236","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: restrict SO_ATTACH_FILTER to priv users\n\nThis patch restricts the use of SO_ATTACH_FILTER (cBPF) on TCP sockets\nto users with CAP_NET_ADMIN capability.\n\nThis blocks potential side-channel attack where an unprivileged application\nattaches a filter to leak TCP sequence/acknowledgment numbers.","Type":"Description","Title":"tcp: restrict SO_ATTACH_FILTER to priv users"}]}}}