{"id":"CVE-2006-5173","aliases":["BELL-CVE-2006-5173","EUVD-2006-5158","GHSA-pm7g-vxcv-89q8"],"status":"published","title":"Linux kernel does not properly save or restore EFLAGS during a context switch, or reset the flags...","description":"Linux kernel does not properly save or restore EFLAGS during a context switch, or reset the flags when creating new threads, which allows local users to cause a denial of service (process crash), as demonstrated using a process that sets the Alignment Check flag (EFLAGS 0x40000), which triggers a SIGBUS in other processes that have an unaligned access.","severity":{"version":"2.0","score":2.1,"vector":"AV:L/AC:L/Au:N/C:N/I:N/A:P","level":"low","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00435,"percentile":0.38096,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2006-10-17T22:00:00Z","modified":"2026-06-16T22:30:38Z","products":[{"vendor":"canonical","product":"ubuntu_linux"},{"vendor":"linux","product":"linux_kernel"}],"references":[{"url":"http://www.novell.com/linux/security/advisories/2006_79_kernel.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred","Broken Link"]},{"url":"http://secunia.com/advisories/23361","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Broken Link"]},{"url":"http://secunia.com/advisories/23593","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Broken Link"]},{"url":"http://secunia.com/advisories/23384","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Broken Link"]},{"url":"http://www.securityfocus.com/bid/21851","tags":["vdb-entry","x_refsource_BID","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"http://kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=47a5c6fa0e204a2b63309c648bb2fde36836c826","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"http://secunia.com/advisories/23474","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Broken Link"]},{"url":"http://www.securityfocus.com/archive/1/471457","tags":["mailing-list","x_refsource_BUGTRAQ","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"http://www.mandriva.com/security/advisories?name=MDKSA-2007:002","tags":["vendor-advisory","x_refsource_MANDRIVA","x_transferred","Broken Link"]},{"url":"http://www.ubuntu.com/usn/usn-395-1","tags":["vendor-advisory","x_refsource_UBUNTU","x_transferred","Third Party Advisory"]},{"url":"http://secunia.com/advisories/25691","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Broken Link"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2006-5173"},{"url":"http://kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=47a5c6fa0e204a2b63309c648bb2fde36836c826"},{"url":"https://github.com/advisories/GHSA-pm7g-vxcv-89q8"},{"url":"https://docs.bell-sw.com/security/cves/CVE-2006-5173","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2006-5173","description":"Linux kernel does not properly save or restore EFLAGS during a context switch, or reset the flags when creating new threads, which allows local users to cause a denial of service (process crash), as demonstrated using a process that sets the Alignment Check flag (EFLAGS 0x40000), which triggers a SIGBUS in other processes that have an unaligned access.","status":"published","published":"2006-10-17T22:00:00Z","modified":"2024-08-07T19:41:05.034Z","updated_at":"2026-11-02T14:33:48.500736Z"}],"euvd":[{"id":"EUVD-2006-5158","description":"Linux kernel does not properly save or restore EFLAGS during a context switch, or reset the flags when creating new threads, which allows local users to cause a denial of service (process crash), as demonstrated using a process that sets the Alignment Check flag (EFLAGS 0x40000), which triggers a SIGBUS in other processes that have an unaligned access.","status":"published","published":"2006-10-17T22:00:00Z","modified":"2024-08-07T19:41:05Z","updated_at":"2026-11-03T01:15:48.962734Z"}],"ghsa":[{"id":"GHSA-pm7g-vxcv-89q8","title":"Linux kernel does not properly save or restore EFLAGS during a context switch, or reset the flags...","description":"Linux kernel does not properly save or restore EFLAGS during a context switch, or reset the flags when creating new threads, which allows local users to cause a denial of service (process crash), as demonstrated using a process that sets the Alignment Check flag (EFLAGS 0x40000), which triggers a SIGBUS in other processes that have an unaligned access.","status":"published","published":"2022-05-01T07:25:49Z","modified":"2025-04-09T03:33:20Z","updated_at":"2026-11-02T15:00:52.801688Z"}],"nvd":[{"id":"CVE-2006-5173","description":"Linux kernel does not properly save or restore EFLAGS during a context switch, or reset the flags when creating new threads, which allows local users to cause a denial of service (process crash), as demonstrated using a process that sets the Alignment Check flag (EFLAGS 0x40000), which triggers a SIGBUS in other processes that have an unaligned access.","status":"published","published":"2006-10-17T22:07:00Z","modified":"2026-06-16T22:30:38.563Z","cvss":[{"version":"2.0","score":2.1,"vector":"AV:L/AC:L/Au:N/C:N/I:N/A:P","level":"low","assessor":"primary"}],"updated_at":"2026-11-02T14:01:07.481037Z"}],"osv":[{"id":"BELL-CVE-2006-5173","title":"CVE-2006-5173 does not affect BellSoft software","status":"withdrawn","published":"2006-10-17T22:07:00Z","modified":"2026-01-28T07:21:48.840934Z","cvss":[{"version":"2.0","score":2.1,"vector":"AV:L/AC:L/Au:N/C:N/I:N/A:P","level":"low"}],"updated_at":"2026-11-02T15:28:12.886815Z"}]}}