Description
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.
References (2)
Core 2
Core References
Vendor Advisory x_refsource_confirm
https://github.com/pjsip/pjproject/security/advisories/GHSA-p965-mf7j-gwv8
Scores
CVSS v3
6.5
EPSS
0.0002
EPSS Percentile
5.3%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-416
Status
published
Products (1)
pjsip/pjsip
< 2.17
Published
Feb 19, 2026
Tracked Since
Feb 19, 2026