{"id":"CVE-2026-98394","summary":"af_unix: Return immediately when manage_oob() returns NULL for 0-length buffer.","details":"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.","modified":"2026-10-15T02:47:42.021278509Z","published":"2026-10-14T13:25:57.287Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98394.json"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3d3c7a3df66b2ca3d2cd1a2a0c37eb701feba713"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6e5ee08eb5858d175da6768d75d163817b6a9d4a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c81c5be3826c8467945b964d0cf7f7b3d65461db"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d5dd55b316ca229a4cbf11729483ba5bb57233e7"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98394.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98394"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"314001f0bf927015e459c9d387d62a231fe93af3"},{"fixed":"3d3c7a3df66b2ca3d2cd1a2a0c37eb701feba713"},{"fixed":"d5dd55b316ca229a4cbf11729483ba5bb57233e7"},{"fixed":"c81c5be3826c8467945b964d0cf7f7b3d65461db"},{"fixed":"6e5ee08eb5858d175da6768d75d163817b6a9d4a"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98394.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.15.0"},{"fixed":"6.12.111"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.53"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.7"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98394.json"}}],"schema_version":"1.9.0"}