CVE-2019-13272

HIGH7.8

CISA KEV

Published 2019-07-17 · Updated 2026-06-17 · Source cve@mitre.org

Summary

CVE-2019-13272 is a high-severity (CVSS 7.8) vulnerability in Linux Kernel. CISA added it to the Known Exploited Vulnerabilities catalog on December 10, 2021, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by June 10, 2022. CISA does not currently list it as used in ransomware campaigns. Linux has 32 vulnerabilities in the KEV catalog, 2 of them linked to ransomware.

All 32 known-exploited Linux vulnerabilities →

Description

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.

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

CISA Known-Exploited Vulnerability

Product: Linux — Kernel

Name: Linux Kernel Improper Privilege Management Vulnerability

Date added: 2021-12-10 · Due: 2022-06-10

Required action: Apply updates per vendor instructions.

References

View on NVD

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