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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.","epss":{"date":"2026-11-12","epss":0.52199,"percentile":0.98976},"epss_checked":1794522003,"first_seen":1793665375,"kev":{"cveID":"CVE-2019-13272","cwes":["CWE-269"],"dateAdded":"2021-12-10","dueDate":"2022-06-10","forensicTriage":"No","knownRansomwareCampaignUse":"Unknown","notes":"https://nvd.nist.gov/vuln/detail/CVE-2019-13272","product":"Kernel","requiredAction":"Apply updates per vendor instructions.","shortDescription":"Kernel/ptrace.c in Linux kernel mishandles contains an improper privilege management vulnerability that allows local users to obtain root access.","vendorProject":"Linux","vulnerabilityName":"Linux Kernel Improper Privilege Management Vulnerability"},"kev_checked":1794522003,"products":"n/a n/a","references":["http://packetstormsecurity.com/files/153663/Linux-PTRACE_TRACEME-Broken-Permission-Object-Lifetime-Handling.html","https://bugs.chromium.org/p/project-zero/issues/detail?id=1903","https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.1.17","https://github.com/torvalds/linux/commit/6994eefb0053799d2e07cd140df6c2ea106c41ee","https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6994eefb0053799d2e07cd140df6c2ea106c41ee","https://bugzilla.suse.com/show_bug.cgi?id=1140671","https://bugzilla.redhat.com/show_bug.cgi?id=1730895","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OGRK5LYWBJ4E4SRI4DKX367NHYSI3VOH/","https://www.debian.org/security/2019/dsa-4484","https://seclists.org/bugtraq/2019/Jul/30","https://seclists.org/bugtraq/2019/Jul/33","https://lists.debian.org/debian-lts-announce/2019/07/msg00022.html","https://lists.debian.org/debian-lts-announce/2019/07/msg00023.html","http://packetstormsecurity.com/files/153702/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html","https://security.netapp.com/advisory/ntap-20190806-0001/","https://access.redhat.com/errata/RHSA-2019:2405","https://access.redhat.com/errata/RHSA-2019:2411","https://usn.ubuntu.com/4093-1/","https://usn.ubuntu.com/4094-1/","https://usn.ubuntu.com/4095-1/","http://packetstormsecurity.com/files/154245/Kernel-Live-Patch-Security-Notice-LSN-0054-1.html","https://support.f5.com/csp/article/K91025336","https://usn.ubuntu.com/4117-1/","https://usn.ubuntu.com/4118-1/","https://access.redhat.com/errata/RHSA-2019:2809","https://support.f5.com/csp/article/K91025336?utm_source=f5support&amp%3Butm_medium=RSS","http://packetstormsecurity.com/files/154957/Linux-Polkit-pkexec-Helper-PTRACE_TRACEME-Local-Root.html","http://packetstormsecurity.com/files/156929/Linux-PTRACE_TRACEME-Local-Root.html","http://packetstormsecurity.com/files/165051/Linux-Kernel-5.1.x-PTRACE_TRACEME-pkexec-Local-Privilege-Escalation.html","https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-13272"],"score":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","provider":"CISA-ADP","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"solutions":"","state":"PUBLISHED","title":"Linux Kernel Improper Privilege Management Vulnerability","updated_at":1794500401,"workarounds":""},"sources":[]}