{"id":"CVE-2015-7550","details":"The keyctl_read_key function in security/keys/keyctl.c in the Linux kernel before 4.3.4 does not properly use a semaphore, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via a crafted application that leverages a race condition between keyctl_revoke and keyctl_read calls.","modified":"2026-01-27T04:14:02.676946Z","published":"2016-02-08T03:59:02Z","withdrawn":"2026-01-27T04:14:02.676946Z","related":["MGASA-2016-0225","MGASA-2016-0232","MGASA-2016-0233","SUSE-SU-2016:0168-1","SUSE-SU-2016:0585-1","SUSE-SU-2016:0911-1","SUSE-SU-2016:1102-1","SUSE-SU-2016:1203-1","SUSE-SU-2016:2074-1","openSUSE-SU-2024:10128-1"],"references":[{"type":"ADVISORY","url":"http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b4a1b4f5047e4f54e194681125c74c0aa64d637d"},{"type":"ADVISORY","url":"http://www.debian.org/security/2016/dsa-3434"},{"type":"ADVISORY","url":"http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.3.4"},{"type":"ADVISORY","url":"http://www.ubuntu.com/usn/USN-2888-1"},{"type":"ADVISORY","url":"http://www.ubuntu.com/usn/USN-2890-1"},{"type":"ADVISORY","url":"http://www.ubuntu.com/usn/USN-2890-2"},{"type":"ADVISORY","url":"http://www.ubuntu.com/usn/USN-2890-3"},{"type":"ADVISORY","url":"http://www.ubuntu.com/usn/USN-2911-1"},{"type":"ADVISORY","url":"http://www.ubuntu.com/usn/USN-2911-2"},{"type":"FIX","url":"https://github.com/torvalds/linux/commit/b4a1b4f5047e4f54e194681125c74c0aa64d637d"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1291197"},{"type":"WEB","url":"http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00094.html"},{"type":"WEB","url":"http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00045.html"},{"type":"WEB","url":"http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00038.html"},{"type":"WEB","url":"http://www.securityfocus.com/bid/79903"},{"type":"WEB","url":"https://security-tracker.debian.org/tracker/CVE-2015-7550"}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}