Use After Free Affecting glibc package, versions *


Severity

Recommended
low

Based on Ubuntu security rating.

Threat Intelligence

EPSS
1.39% (87th percentile)

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  • Snyk IDSNYK-UBUNTU2004-GLIBC-1297554
  • published6 Nov 2021
  • disclosed25 May 2021

Introduced: 25 May 2021

CVE-2021-33574  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

There is no fixed version for Ubuntu:20.04 glibc.

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc package and not the glibc package as distributed by Ubuntu. See How to fix? for Ubuntu:20.04 relevant fixed versions and status.

The mq_notify function in the GNU C Library (aka glibc) versions 2.32 and 2.33 has a use-after-free. It may use the notification thread attributes object (passed through its struct sigevent parameter) after it has been freed by the caller, leading to a denial of service (application crash) or possibly unspecified other impact.

CVSS Scores

version 3.1