{"id":"CVE-2013-3661","aliases":["EUVD-2013-3594","GHSA-qx37-q6px-wm6q"],"status":"published","title":"The EPATHOBJ::bFlatten function in win32k.sys in Microsoft Windows XP SP2 and SP3, Windows Server...","description":"The EPATHOBJ::bFlatten function in win32k.sys in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows Server 2012, and Windows RT does not check whether linked-list traversal is continually accessing the same list member, which allows local users to cause a denial of service (infinite traversal) via vectors that trigger a crafted PATHRECORD chain.","severity":{"version":"2.0","score":4.9,"vector":"AV:L/AC:L/Au:N/C:N/I:N/A:C","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.03852,"percentile":0.90223,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-22"],"published":"2013-05-24T20:00:00Z","modified":"2026-06-16T23:55:35Z","exploits":[{"source":"exploitdb","id":"EDB-25611","title":"Microsoft Windows - Win32k!EPATHOBJ::pprFlattenRec Uninitialized Next Pointer Testcase","type":"dos","platform":"windows","date":"2013-05-21","verified":true,"url":"https://www.exploit-db.com/exploits/25611"},{"source":"exploitdb","id":"EDB-25912","title":"Microsoft Windows NT/2000/2003/2008/XP/Vista/7/8 - 'EPATHOBJ' Local Ring","type":"local","platform":"windows","date":"2013-06-03","verified":true,"url":"https://www.exploit-db.com/exploits/25912"},{"source":"exploitdb","id":"EDB-26554","title":"Microsoft Windows - 'EPATHOBJ::pprFlattenRec' Local Privilege Escalation (Metasploit)","type":"local","platform":"windows","date":"2013-07-02","verified":true,"url":"https://www.exploit-db.com/exploits/26554"}],"products":[{"vendor":"microsoft","product":"windows_7"},{"vendor":"microsoft","product":"windows_8"},{"vendor":"microsoft","product":"windows_rt"},{"vendor":"microsoft","product":"windows_server_2003"},{"vendor":"microsoft","product":"windows_server_2008"},{"vendor":"microsoft","product":"windows_server_2012"},{"vendor":"microsoft","product":"windows_vista"},{"vendor":"microsoft","product":"windows_xp"}],"references":[{"url":"http://archives.neohapsis.com/archives/fulldisclosure/2013-05/0094.html","tags":["mailing-list","x_refsource_FULLDISC","x_transferred"]},{"url":"http://www.exploit-db.com/exploits/25611/","tags":["exploit","x_refsource_EXPLOIT-DB","x_transferred"]},{"url":"http://secunia.com/advisories/53435","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Vendor Advisory"]},{"url":"http://www.osvdb.org/93539","tags":["vdb-entry","x_refsource_OSVDB","x_transferred"]},{"url":"http://www.computerworld.com/s/article/9239477","tags":["x_refsource_MISC","x_transferred"]},{"url":"http://www.theverge.com/2013/5/23/4358400/google-engineer-bashes-microsoft-discloses-windows-flaw","tags":["x_refsource_MISC","x_transferred"]},{"url":"http://www.reddit.com/r/netsec/comments/1eqh66/0day_windows_kernel_epathobj_vulnerability/","tags":["x_refsource_MISC","x_transferred"]},{"url":"http://archives.neohapsis.com/archives/fulldisclosure/2013-06/0006.html","tags":["mailing-list","x_refsource_FULLDISC","x_transferred"]},{"url":"http://twitter.com/taviso/statuses/335557286657400832","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2013-3661"},{"url":"http://www.exploit-db.com/exploits/25611"},{"url":"http://www.reddit.com/r/netsec/comments/1eqh66/0day_windows_kernel_epathobj_vulnerability"},{"url":"https://github.com/advisories/GHSA-qx37-q6px-wm6q"}],"sources":{"cve":[{"id":"CVE-2013-3661","description":"The EPATHOBJ::bFlatten function in win32k.sys in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows Server 2012, and Windows RT does not check whether linked-list traversal is continually accessing the same list member, which allows local users to cause a denial of service (infinite traversal) via vectors that trigger a crafted PATHRECORD chain.","status":"published","published":"2013-05-24T20:00:00Z","modified":"2024-08-06T16:14:56.685Z","updated_at":"2026-11-02T14:34:56.872243Z"}],"euvd":[{"id":"EUVD-2013-3594","description":"The EPATHOBJ::bFlatten function in win32k.sys in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows Server 2012, and Windows RT does not check whether linked-list traversal is continually accessing the same list member, which allows local users to cause a denial of service (infinite traversal) via vectors that trigger a crafted PATHRECORD chain.","status":"published","published":"2013-05-24T20:00:00Z","modified":"2024-08-06T16:14:56Z","updated_at":"2026-11-03T01:56:34.623989Z"}],"ghsa":[{"id":"GHSA-qx37-q6px-wm6q","title":"The EPATHOBJ::bFlatten function in win32k.sys in Microsoft Windows XP SP2 and SP3, Windows Server...","description":"The EPATHOBJ::bFlatten function in win32k.sys in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows Server 2012, and Windows RT does not check whether linked-list traversal is continually accessing the same list member, which allows local users to cause a denial of service (infinite traversal) via vectors that trigger a crafted PATHRECORD chain.","status":"published","published":"2022-05-14T01:31:27Z","modified":"2025-04-11T04:10:38Z","cwes":["CWE-22"],"updated_at":"2026-11-02T15:01:13.537017Z"}],"nvd":[{"id":"CVE-2013-3661","description":"The EPATHOBJ::bFlatten function in win32k.sys in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows Server 2012, and Windows RT does not check whether linked-list traversal is continually accessing the same list member, which allows local users to cause a denial of service (infinite traversal) via vectors that trigger a crafted PATHRECORD chain.","status":"published","published":"2013-05-24T20:55:01.94Z","modified":"2026-06-16T23:55:35.98Z","cvss":[{"version":"2.0","score":4.9,"vector":"AV:L/AC:L/Au:N/C:N/I:N/A:C","level":"medium","assessor":"primary"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:02:29.210317Z"}]}}