Heap-based Buffer Overflow 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
0.29% (21st percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-ASTERISK-16134262
  • published23 Apr 2026
  • disclosed20 Feb 2026

Introduced: 20 Feb 2026

CVE-2026-26967  (opens in a new tab)
CWE-122  (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 written in C. In versions 2.16 and below, there is a critical Heap-based Buffer Overflow vulnerability in PJSIP's H.264 unpacketizer. The bug occurs when processing malformed SRTP packets, where the unpacketizer reads a 2-byte NAL unit size field without validating that both bytes are within the payload buffer bounds. The vulnerability affects applications that receive video using H.264. A patch is available at https://github.com/pjsip/pjproject/commit/f821c214e52b11bae11e4cd3c7f0864538fb5491.

CVSS Base Scores

version 3.1