CVE-2019-13272

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.

Score
CVSS 3.1 7.8 High
Status
Analyzed - cve@mitre.org
Published
2019-07-17
Last modified
2025-10-21
Known exploited (CISA KEV)
since 2021-12-10, action due 2022-06-10: Apply updates per vendor instructions.

Affected products

References

 
 
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