{"id":"CVE-2019-13272","details":"In the Linux kernel before 5.1.17, ptrace_link in kernel/ptrace.c mishandles the recording of the credentials of a process that wants to create a ptrace relationship, which allows local users to obtain root access by leveraging certain scenarios with a parent-child process relationship, where a parent drops privileges and calls execve (potentially allowing control by an attacker). One contributing factor is an object lifetime issue (which can also cause a panic). Another contributing factor is incorrect marking of a ptrace relationship as privileged, which is exploitable through (for example) Polkit's pkexec helper with PTRACE_TRACEME. NOTE: SELinux deny_ptrace might be a usable workaround in some environments.","modified":"2026-04-11T08:05:38.174257Z","published":"2019-07-17T13:15:10.687Z","related":["SUSE-SU-2019:2949-1","SUSE-SU-2019:2984-1","SUSE-SU-2019:3223-1","SUSE-SU-2019:3224-1","SUSE-SU-2019:3225-1","SUSE-SU-2019:3228-1","SUSE-SU-2019:3230-1","SUSE-SU-2019:3232-1","SUSE-SU-2019:3246-1","SUSE-SU-2019:3247-1","SUSE-SU-2019:3248-1","SUSE-SU-2019:3249-1","SUSE-SU-2019:3252-1","SUSE-SU-2019:3258-1","SUSE-SU-2019:3260-1","SUSE-SU-2019:3261-1","SUSE-SU-2019:3263-1"],"references":[{"type":"WEB","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-13272"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OGRK5LYWBJ4E4SRI4DKX367NHYSI3VOH/"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20190806-0001/"},{"type":"ADVISORY","url":"https://www.debian.org/security/2019/dsa-4484"},{"type":"ADVISORY","url":"http://packetstormsecurity.com/files/153663/Linux-PTRACE_TRACEME-Broken-Permission-Object-Lifetime-Handling.html"},{"type":"ADVISORY","url":"http://packetstormsecurity.com/files/153702/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html"},{"type":"ADVISORY","url":"https://support.f5.com/csp/article/K91025336?utm_source=f5support&amp%3Butm_medium=RSS"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:2809"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/4095-1/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/4117-1/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/4094-1/"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:2411"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2019/07/msg00022.html"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2019/07/msg00023.html"},{"type":"ADVISORY","url":"https://support.f5.com/csp/article/K91025336"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/4093-1/"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:2405"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/4118-1/"},{"type":"REPORT","url":"https://seclists.org/bugtraq/2019/Jul/30"},{"type":"REPORT","url":"https://seclists.org/bugtraq/2019/Jul/33"},{"type":"FIX","url":"https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6994eefb0053799d2e07cd140df6c2ea106c41ee"},{"type":"FIX","url":"https://bugs.chromium.org/p/project-zero/issues/detail?id=1903"},{"type":"FIX","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1730895"},{"type":"FIX","url":"https://bugzilla.suse.com/show_bug.cgi?id=1140671"},{"type":"FIX","url":"https://github.com/torvalds/linux/commit/6994eefb0053799d2e07cd140df6c2ea106c41ee"},{"type":"FIX","url":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.1.17"},{"type":"EVIDENCE","url":"http://packetstormsecurity.com/files/154245/Kernel-Live-Patch-Security-Notice-LSN-0054-1.html"},{"type":"EVIDENCE","url":"http://packetstormsecurity.com/files/154957/Linux-Polkit-pkexec-Helper-PTRACE_TRACEME-Local-Root.html"},{"type":"EVIDENCE","url":"http://packetstormsecurity.com/files/156929/Linux-PTRACE_TRACEME-Local-Root.html"},{"type":"EVIDENCE","url":"http://packetstormsecurity.com/files/165051/Linux-Kernel-5.1.x-PTRACE_TRACEME-pkexec-Local-Privilege-Escalation.html"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/torvalds/linux","events":[{"introduced":"0"},{"fixed":"64291f7db5bd8150a74ad2036f1037e6a0428df2"},{"introduced":"0"},{"fixed":"69973b830859bc6529a7a0468ba0d80ee5117826"},{"fixed":"6994eefb0053799d2e07cd140df6c2ea106c41ee"}],"database_specific":{"versions":[{"introduced":"4.1.39"},{"fixed":"4.2"},{"introduced":"4.8.16"},{"fixed":"4.9"}]}}],"versions":["v2.6.12-rc2","v2.6.12-rc3","v2.6.12-rc4","v2.6.13","v2.6.13-rc1","v2.6.13-rc2","v2.6.13-rc3","v2.6.13-rc4","v2.6.13-rc5","v2.6.13-rc6","v2.6.13-rc7","v2.6.14-rc1","v2.6.14-rc2","v2.6.14-rc3","v2.6.15-rc1","v2.6.15-rc2","v2.6.15-rc4","v2.6.15-rc5","v2.6.15-rc7","v2.6.16","v2.6.16-rc1","v2.6.16-rc2","v2.6.16-rc3","v2.6.16-rc4","v2.6.16-rc5","v2.6.16-rc6","v2.6.17","v2.6.17-rc1","v2.6.17-rc2","v2.6.17-rc3","v2.6.17-rc4","v2.6.17-rc5","v2.6.17-rc6","v2.6.18","v2.6.18-rc1","v2.6.18-rc2","v2.6.18-rc3","v2.6.18-rc5","v2.6.18-rc6","v2.6.19-rc1","v2.6.19-rc2","v2.6.20-rc1","v2.6.20-rc2","v2.6.20-rc3","v2.6.20-rc4","v2.6.20-rc5","v2.6.20-rc6","v2.6.20-rc7","v2.6.21","v2.6.21-rc1","v2.6.21-rc2","v2.6.21-rc3","v2.6.21-rc4","v2.6.21-rc5","v2.6.21-rc6","v2.6.21-rc7","v2.6.22","v2.6.22-rc1","v2.6.22-rc2","v2.6.22-rc3","v2.6.22-rc4","v2.6.22-rc5","v2.6.22-rc6","v2.6.22-rc7","v2.6.23","v2.6.23-rc1","v2.6.23-rc2","v2.6.23-rc3","v2.6.23-rc4","v2.6.23-rc5","v2.6.23-rc6","v2.6.23-rc7","v2.6.23-rc8","v2.6.23-rc9","v2.6.24","v2.6.24-rc1","v2.6.24-rc2","v2.6.24-rc3","v2.6.24-rc4","v2.6.24-rc5","v2.6.24-rc6","v2.6.24-rc7","v2.6.24-rc8","v2.6.25","v2.6.25-rc1","v2.6.25-rc2","v2.6.25-rc3","v2.6.25-rc4","v2.6.25-rc5","v2.6.25-rc6","v2.6.25-rc7","v2.6.25-rc8","v2.6.25-rc9","v2.6.26","v2.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