Vulnerability Description
Asterisk is an open source private branch exchange and telephony toolkit. Prior to Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3, an authenticated attacker may cause a heap-use-after-free in `PJSIP TCP/SDP` handling by sending a `SIP INVITE` over a connection-oriented transport and disconnecting before Asterisk responds with the `200 OK`. So far, the crash has only been reproduced when Asterisk is built with `Address Sanitizer`, which detects the issue. `Address Sanitizer` is a development tool with significant performance overhead and, according to the maintainer, is not used in production systems. This issue is fixed in Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3.
Related Weaknesses (CWE)
References
- https://github.com/asterisk/asterisk/commit/0f076168e0be31ebee37762192d0ee049e9c
- https://github.com/asterisk/asterisk/commit/27b9544b32f059a4f614169243eaa7559f62
- https://github.com/asterisk/asterisk/commit/6e1f4df744369d66ea6f412e355d819b2a7b
- https://github.com/asterisk/asterisk/commit/9e0386c6d259f0c7499d52499d9891bee8a4
- https://github.com/asterisk/asterisk/commit/b7ba85458796ef54b471017287c7806095db
- https://github.com/asterisk/asterisk/commit/d4e30005940f86942745bcc64f34748d6987
- https://github.com/asterisk/asterisk/commit/f1e47621472bb3d8ad71f32823f5ca986e00
- https://github.com/asterisk/asterisk/releases/tag/20.20.1
- https://github.com/asterisk/asterisk/releases/tag/21.12.3
- https://github.com/asterisk/asterisk/releases/tag/22.10.1
- https://github.com/asterisk/asterisk/releases/tag/23.4.1
- https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11
- https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3
- https://github.com/asterisk/asterisk/security/advisories/GHSA-g8q2-p36q-94f6
- https://github.com/asterisk/asterisk/tree/24.0.0-pre1
FAQ
What is CVE-2026-57187?
CVE-2026-57187 is a documented vulnerability. Asterisk is an open source private branch exchange and telephony toolkit. Prior to Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3, an authenticated attacker ...
How severe is CVE-2026-57187?
CVSS scoring is not yet available for CVE-2026-57187. Check NVD for updates.
Is there a patch for CVE-2026-57187?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.