CVE-2021-43057

HighCVSS 7.8/10Last modified Jun 17, 2026

Description

An issue was discovered in the Linux kernel before 5.14.8. A use-after-free in selinux_ptrace_traceme (aka the SELinux handler for PTRACE_TRACEME) could be used by local attackers to cause memory corruption and escalate privileges, aka CID-a3727a8bac0a. This occurs because of an attempt to access the subjective credentials of another task.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-416

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://bugs.chromium.org/p/project-zero/issues/detail?id=2229Exploit, Patch, Third Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.8Patch, Release Notes, Vendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a3727a8bac0a9e77c70820655fd8715523ba3db7Patch, Vendor Advisory
https://security.netapp.com/advisory/ntap-20211125-0001/Third Party Advisory
https://bugs.chromium.org/p/project-zero/issues/detail?id=2229Exploit, Patch, Third Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.8Patch, Release Notes, Vendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a3727a8bac0a9e77c70820655fd8715523ba3db7Patch, Vendor Advisory
https://security.netapp.com/advisory/ntap-20211125-0001/Third Party Advisory

Timeline

Published: Oct 28, 2021
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2021

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