Use After Free Affecting asterisk package, versions <1:22.10.0+dfsg+~cs6.17.60671434-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.1% (2nd percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-ASTERISK-16134254
  • published23 Apr 2026
  • disclosed19 Feb 2026

Introduced: 19 Feb 2026

CVE-2026-26203  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Debian:unstable asterisk to version 1:22.10.0+dfsg+~cs6.17.60671434-1 or higher.

NVD Description

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

PJSIP is a free and open source multimedia communication library. Versions prior to 2.17 have a critical heap buffer underflow vulnerability in PJSIP's H.264 packetizer. The bug occurs when processing malformed H.264 bitstreams without NAL unit start codes, where the packetizer performs unchecked pointer arithmetic that can read from memory located before the allocated buffer. Version 2.17 contains a patch for the issue.

CVSS Base Scores

version 3.1