Use After Free Affecting pjproject package, versions <2.17-r0


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.17% (6th percentile)

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  • Snyk IDSNYK-ALPINE324-PJPROJECT-17297864
  • published11 Jun 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 Alpine:3.24 pjproject to version 2.17-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream pjproject package and not the pjproject package as distributed by Alpine. See How to fix? for Alpine:3.24 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