CVE-2023-38703: Teluu Pjsip

Critical severity, CVSS 9.8. EPSS: 1.6% chance of exploitation in the next 30 days.

PJSIP is a free and open source multimedia communication library written in C with high level API in C, C++, Java, C#, and Python languages. SRTP is a higher level media transport which is stacked upon a lower level media transport such as UDP and ICE. Currently a higher level transport is not synchronized with its lower level transport that may introduce use-after-free issue. This vulnerability affects applications that have SRTP capability (`PJMEDIA_HAS_SRTP` is set) and use underlying media transport other than UDP. This vulnerability’s impact may range from unexpected application termination to control flow hijack/memory corruption. The patch is available as a commit in the master branch.

Affected products

• Teluu Pjsip: up to and including 2.13.1

Published 2023-10-06. Last modified 2026-06-17.