Vulnerability Description
PJSIP is a free and open source multimedia communication library written in C. Prior to commit a1b707c, a stack buffer overflow exists in the SRTP/SDES media transport when processing a=crypto attributes during SDP offer/answer (sdes_encode_sdp() in transport_srtp_sdes.c). This affects applications with SRTP enabled (use_srtp optional or mandatory, using SDES keying). During media negotiation, the crypto attributes from the remote SDP are collected into a fixed-size array without bounding their number; a remote peer that includes an excessive number of a=crypto attributes in a single media description can write past the end of that array on the stack. This is reachable from an incoming SIP INVITE during offer/answer, before application-level authentication. Impact may range from unexpected application termination to control flow hijack/memory corruption. Applications that do not enable SRTP are not affected. This issue has been patched via commit a1b707c.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Teluu | Pjsip | <= 2.17 |
Related Weaknesses (CWE)
References
- https://github.com/pjsip/pjproject/commit/a1b707c0c9b0506faf2a8a438b60f11ffd6a6fPatch
- https://github.com/pjsip/pjproject/security/advisories/GHSA-m9g3-jcj8-qjfmPatchVendor Advisory
FAQ
What is CVE-2026-57162?
CVE-2026-57162 is a vulnerability with a CVSS score of 9.1 (CRITICAL). PJSIP is a free and open source multimedia communication library written in C. Prior to commit a1b707c, a stack buffer overflow exists in the SRTP/SDES media transport when processing a=crypto attribu...
How severe is CVE-2026-57162?
CVE-2026-57162 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-57162?
Check the references section above for vendor advisories and patch information. Affected products include: Teluu Pjsip.