{"id":"CVE-2009-3527","aliases":["EUVD-2009-3509","GHSA-4c32-x28m-p8h3"],"status":"published","title":"Race condition in the Pipe (IPC) close function in FreeBSD 6.3 and 6.4 allows local users to...","description":"Race condition in the Pipe (IPC) close function in FreeBSD 6.3 and 6.4 allows local users to cause a denial of service (crash) or gain privileges via vectors related to kqueues, which triggers a use after free, leading to a NULL pointer dereference or memory corruption.","severity":{"version":"2.0","score":6.9,"vector":"AV:L/AC:M/Au:N/C:C/I:C/A:C","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00554,"percentile":0.46527,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-362"],"published":"2009-10-06T22:00:00Z","modified":"2026-06-16T23:11:46Z","exploits":[{"source":"exploitdb","id":"EDB-9859","title":"FreeBSD 6.4 - 'pipeclose()'/'knlist_cleardel()' Race Condition","type":"local","platform":"freebsd","date":"2009-10-08","verified":true,"url":"https://www.exploit-db.com/exploits/9859"}],"products":[{"vendor":"freebsd","product":"freebsd"}],"references":[{"url":"http://www.securitytracker.com/id?1022982","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred","Patch"]},{"url":"http://security.freebsd.org/advisories/FreeBSD-SA-09:13.pipe.asc","tags":["vendor-advisory","x_refsource_FREEBSD","x_transferred","Patch"]},{"url":"http://osvdb.org/58544","tags":["vdb-entry","x_refsource_OSVDB","x_transferred"]},{"url":"http://www.securityfocus.com/archive/1/506449","tags":["mailing-list","x_refsource_BUGTRAQ","x_transferred","Exploit"]},{"url":"http://www.securityfocus.com/bid/36375","tags":["vdb-entry","x_refsource_BID","x_transferred","Patch"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2009-3527"},{"url":"https://github.com/advisories/GHSA-4c32-x28m-p8h3"}],"sources":{"cve":[{"id":"CVE-2009-3527","description":"Race condition in the Pipe (IPC) close function in FreeBSD 6.3 and 6.4 allows local users to cause a denial of service (crash) or gain privileges via vectors related to kqueues, which triggers a use after free, leading to a NULL pointer dereference or memory corruption.","status":"published","published":"2009-10-06T22:00:00Z","modified":"2024-09-17T04:20:26.088Z","updated_at":"2026-11-02T14:33:23.749891Z"}],"euvd":[{"id":"EUVD-2009-3509","description":"Race condition in the Pipe (IPC) close function in FreeBSD 6.3 and 6.4 allows local users to cause a denial of service (crash) or gain privileges via vectors related to kqueues, which triggers a use after free, leading to a NULL pointer dereference or memory corruption.","status":"published","published":"2009-10-06T22:00:00Z","modified":"2024-09-17T04:20:26Z","updated_at":"2026-11-03T00:28:23.906788Z"}],"ghsa":[{"id":"GHSA-4c32-x28m-p8h3","title":"Race condition in the Pipe (IPC) close function in FreeBSD 6.3 and 6.4 allows local users to...","description":"Race condition in the Pipe (IPC) close function in FreeBSD 6.3 and 6.4 allows local users to cause a denial of service (crash) or gain privileges via vectors related to kqueues, which triggers a use after free, leading to a NULL pointer dereference or memory corruption.","status":"published","published":"2022-05-02T03:45:58Z","modified":"2023-01-31T05:08:21Z","cwes":["CWE-362"],"updated_at":"2026-11-02T14:49:22.824157Z"}],"nvd":[{"id":"CVE-2009-3527","description":"Race condition in the Pipe (IPC) close function in FreeBSD 6.3 and 6.4 allows local users to cause a denial of service (crash) or gain privileges via vectors related to kqueues, which triggers a use after free, leading to a NULL pointer dereference or memory corruption.","status":"published","published":"2009-10-06T22:30:00.25Z","modified":"2026-06-16T23:11:46.853Z","cvss":[{"version":"2.0","score":6.9,"vector":"AV:L/AC:M/Au:N/C:C/I:C/A:C","level":"medium","assessor":"primary"}],"cwes":["CWE-362"],"updated_at":"2026-11-02T14:01:37.004244Z"}]}}