Use After Free Affecting freebsd package, versions [,11.4)[12.0,12.2)


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.04% (6th percentile)

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  • Snyk IDSNYK-UNMANAGED-FREEBSD-2383123
  • published26 Jan 2022
  • disclosed7 Apr 2021
  • creditUnknown

Introduced: 7 Apr 2021

CVE-2021-29626  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade freebsd to version 11.4, 12.2 or higher.

Overview

Affected versions of this package are vulnerable to Use After Free. In FreeBSD 13.0-STABLE before n245117, 12.2-STABLE before r369551, 11.4-STABLE before r369559, 13.0-RC5 before p1, 12.2-RELEASE before p6, and 11.4-RELEASE before p9, copy-on-write logic failed to invalidate shared memory page mappings between multiple processes allowing an unprivileged process to maintain a mapping after it is freed, allowing the process to read private data belonging to other processes or the kernel.

CVSS Scores

version 3.1