{"id":"UBUNTU-CVE-2018-1091","details":"In the flush_tmregs_to_thread function in arch/powerpc/kernel/ptrace.c in the Linux kernel before 4.13.5, a guest kernel crash can be triggered from unprivileged userspace during a core dump on a POWER host due to a missing processor feature check and an erroneous use of transactional memory (TM) instructions in the core dump path, leading to a denial of service.","modified":"2025-07-16T08:22:05.907338Z","published":"2018-03-27T21:29:00Z","withdrawn":"2025-07-18T16:44:22Z","upstream":["CVE-2018-1091"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-1091"},{"type":"REPORT","url":"http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c1fa0768a8713b135848f78fd43ffc208d8ded70"},{"type":"REPORT","url":"http://openwall.com/lists/oss-security/2018/03/27/4"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/cve-2018-1091"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1558149"},{"type":"REPORT","url":"https://github.com/torvalds/linux/commit/c1fa0768a8713b135848f78fd43ffc208d8ded70"},{"type":"REPORT","url":"https://marc.info/?l=linuxppc-embedded&m=150535531910494&w=2"},{"type":"REPORT","url":"https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.5"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2018-1091"}],"affected":[{"package":{"name":"linux-azure","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/linux-azure@4.15.0-1023.24~14.04.1?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-1023.24~14.04.1"}]}],"ecosystem_specific":{"binaries":[{"binary_name":"linux-azure-cloud-tools-4.15.0-1023","binary_version":"4.15.0-1023.24~14.04.1"},{"binary_name":"linux-azure-cloud-tools-4.15.0-1023-dbgsym","binary_version":"4.15.0-1023.24~14.04.1"},{"binary_name":"linux-azure-headers-4.15.0-1023","binary_version":"4.15.0-1023.24~14.04.1"},{"binary_name":"linux-azure-tools-4.15.0-1023","binary_version":"4.15.0-1023.24~14.04.1"},{"binary_name":"linux-azure-tools-4.15.0-1023-dbgsym","binary_version":"4.15.0-1023.24~14.04.1"},{"binary_name":"linux-cloud-tools-4.15.0-1023-azure","binary_version":"4.15.0-1023.24~14.04.1"},{"binary_name":"linux-headers-4.15.0-1023-azure","binary_version":"4.15.0-1023.24~14.04.1"},{"binary_name":"linux-image-unsigned-4.15.0-1023-azure","binary_version":"4.15.0-1023.24~14.04.1"},{"binary_name":"linux-image-unsigned-4.15.0-1023-azure-dbgsym","binary_version":"4.15.0-1023.24~14.04.1"},{"binary_name":"linux-modules-4.15.0-1023-azure","binary_version":"4.15.0-1023.24~14.04.1"},{"binary_name":"linux-modules-extra-4.15.0-1023-azure","binary_version":"4.15.0-1023.24~14.04.1"},{"binary_name":"linux-tools-4.15.0-1023-azure","binary_version":"4.15.0-1023.24~14.04.1"}],"availability":"No 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