{"api_version":"1","generated_at":"2026-10-27T05:20:31+00:00","cve":"CVE-2026-98394","urls":{"html":"https://cve.report/CVE-2026-98394","api":"https://cve.report/api/cve/CVE-2026-98394.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-98394","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-98394"},"summary":{"title":"af_unix: Return immediately when manage_oob() returns NULL for 0-length buffer.","description":"In the Linux kernel, the following vulnerability has been resolved:\n\naf_unix: Return immediately when manage_oob() returns NULL for 0-length buffer.\n\nFahad Alharbi reported that recv(0, MSG_PEEK) triggers busy-wait\nin unix_stream_read_generic() if recv() is blocking and the last\nskb in the queue is MSG_OOB skb.\n\nIn such a situation, TCP returns 0 immediately regardless of\nblocking or non-blocking.\n\nLet's follow the behaviour.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-14 14:17:50","updated_at":"2026-10-19 10:18:42"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/d5dd55b316ca229a4cbf11729483ba5bb57233e7","name":"https://git.kernel.org/stable/c/d5dd55b316ca229a4cbf11729483ba5bb57233e7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6e5ee08eb5858d175da6768d75d163817b6a9d4a","name":"https://git.kernel.org/stable/c/6e5ee08eb5858d175da6768d75d163817b6a9d4a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c81c5be3826c8467945b964d0cf7f7b3d65461db","name":"https://git.kernel.org/stable/c/c81c5be3826c8467945b964d0cf7f7b3d65461db","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3d3c7a3df66b2ca3d2cd1a2a0c37eb701feba713","name":"https://git.kernel.org/stable/c/3d3c7a3df66b2ca3d2cd1a2a0c37eb701feba713","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98394","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98394","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 314001f0bf927015e459c9d387d62a231fe93af3 3d3c7a3df66b2ca3d2cd1a2a0c37eb701feba713 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 314001f0bf927015e459c9d387d62a231fe93af3 d5dd55b316ca229a4cbf11729483ba5bb57233e7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 314001f0bf927015e459c9d387d62a231fe93af3 c81c5be3826c8467945b964d0cf7f7b3d65461db git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 314001f0bf927015e459c9d387d62a231fe93af3 6e5ee08eb5858d175da6768d75d163817b6a9d4a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.15","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.111 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.53 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.7 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/unix/af_unix.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"3d3c7a3df66b2ca3d2cd1a2a0c37eb701feba713","status":"affected","version":"314001f0bf927015e459c9d387d62a231fe93af3","versionType":"git"},{"lessThan":"d5dd55b316ca229a4cbf11729483ba5bb57233e7","status":"affected","version":"314001f0bf927015e459c9d387d62a231fe93af3","versionType":"git"},{"lessThan":"c81c5be3826c8467945b964d0cf7f7b3d65461db","status":"affected","version":"314001f0bf927015e459c9d387d62a231fe93af3","versionType":"git"},{"lessThan":"6e5ee08eb5858d175da6768d75d163817b6a9d4a","status":"affected","version":"314001f0bf927015e459c9d387d62a231fe93af3","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/unix/af_unix.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.15"},{"lessThan":"5.15","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.111","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.53","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.7","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.111","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.53","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.7","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"5.15","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\naf_unix: Return immediately when manage_oob() returns NULL for 0-length buffer.\n\nFahad Alharbi reported that recv(0, MSG_PEEK) triggers busy-wait\nin unix_stream_read_generic() if recv() is blocking and the last\nskb in the queue is MSG_OOB skb.\n\nIn such a situation, TCP returns 0 immediately regardless of\nblocking or non-blocking.\n\nLet's follow the behaviour."}],"providerMetadata":{"dateUpdated":"2026-10-19T09:18:47.827Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/3d3c7a3df66b2ca3d2cd1a2a0c37eb701feba713"},{"url":"https://git.kernel.org/stable/c/d5dd55b316ca229a4cbf11729483ba5bb57233e7"},{"url":"https://git.kernel.org/stable/c/c81c5be3826c8467945b964d0cf7f7b3d65461db"},{"url":"https://git.kernel.org/stable/c/6e5ee08eb5858d175da6768d75d163817b6a9d4a"}],"title":"af_unix: Return immediately when manage_oob() returns NULL for 0-length buffer.","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-98394","datePublished":"2026-10-14T13:25:57.287Z","dateReserved":"2026-09-25T10:25:14.346Z","dateUpdated":"2026-10-19T09:18:47.827Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-14 14:17:50","lastModifiedDate":"2026-10-19 10:18:42","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"98394","Ordinal":"1","Title":"af_unix: Return immediately when manage_oob() returns NULL for 0","CVE":"CVE-2026-98394","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"98394","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\naf_unix: Return immediately when manage_oob() returns NULL for 0-length buffer.\n\nFahad Alharbi reported that recv(0, MSG_PEEK) triggers busy-wait\nin unix_stream_read_generic() if recv() is blocking and the last\nskb in the queue is MSG_OOB skb.\n\nIn such a situation, TCP returns 0 immediately regardless of\nblocking or non-blocking.\n\nLet's follow the behaviour.","Type":"Description","Title":"af_unix: Return immediately when manage_oob() returns NULL for 0"}]}}}