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CVE-2019-13272

High · CVSS 7.8EPSS 52.2%CISA KEVCWE-269 · Improper Privilege Management

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

References

NVD MITRE CVE.org CISA KEV

Published

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Community verdict

2 verdicts
Not a real issue

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Community real-world severity: High (High 2) — CVSS base score 7.8

In line with its CVSS base score.

Field notes & remediation

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  • 0
    Field note · Waleed AzizCurated

    Confirmed exploited in the wild — listed in the CISA KEV catalog (added 2021-12-10). Treat as real and prioritize patching over triage.

Related CVEs

Same weakness — CWE-269 · Improper Privilege Management.