CVE-2026-26203
PJSIP's pjmedia-video has use-after-free in H264 packetizer when packetizing fragmented NAL
- State
- Published
- Severity
- 5.1 Medium
- Published
- Feb 19, 2026
- Updated
- Feb 19, 2026
- Reserved
- Feb 11, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.1 Medium | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:L | GitHub_M |
Weaknesses
- CWE-416 Use After Free
Affected Products
| Product | Versions |
|---|---|
pjmedia-videopjsip |
|
References
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