CVE-2026-57192

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 buffer overflow through an out-of-bounds write in the `Codec2` decoder caused by a `floor/ceil sample-count mismatch`. The `codec_codec2` module must be loaded and `Codec2` must be configured on the attacked endpoint. The attacker must pass SIP authentication by username/password or `source IP address matching`, establish a call using `Codec2`, and send carefully crafted `Codec2` audio packets. 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/02e2d8d51efe1f811f2929224339cb1a35ff
• https://github.com/asterisk/asterisk/commit/4f5cad0611c67638a0a61cfedbe645045da8
• https://github.com/asterisk/asterisk/commit/9b085d48fb66e90a0740ea59e26840421fd0
• https://github.com/asterisk/asterisk/commit/a0bc717b2261f4df7cdecc22b58a5fffbd1a
• https://github.com/asterisk/asterisk/commit/a2f1cc611f7d0f21faa03e8535009df3041c
• https://github.com/asterisk/asterisk/commit/aa40bc599a8e628859ef1c4fc944261423ce
• https://github.com/asterisk/asterisk/commit/d4ccfd55ffd7cf6d73a6e5cde347a7464c30
• 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-qf8j-jp7h-c5hx
• https://github.com/asterisk/asterisk/tree/24.0.0-pre1

FAQ

What is CVE-2026-57192?

CVE-2026-57192 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-2026-57192?

CVSS scoring is not yet available for CVE-2026-57192. Check NVD for updates.

Is there a patch for CVE-2026-57192?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.