Vulnerability Description
Asterisk is an open source private branch exchange and telephony toolkit. In affected deployments, an authenticated attacker may cause a `T.140 RED` heap buffer overflow using carefully crafted packets, potentially allowing remote code execution or causing Asterisk to crash. The `chan_sip` channel driver must be installed and configured, and its `textsupport` option must be enabled; `textsupport` defaults to no. `The chan_sip driver was deprecated in Asterisk 20 and completely removed in all later versions.` Repository comparisons verify patch containment in Asterisk 20.20.1, 21.12.3, 22.10.1 and 23.4.1, and Certified Asterisk 20.7-cert11 and 22.8-cert3. The affected release-track scope remains unresolved: structured metadata includes later release tracks even though the advisory says the required `chan_sip` driver was removed there.
Related Weaknesses (CWE)
References
- https://github.com/asterisk/asterisk/commit/0601c33d4edf8c8f221de91cead59460fb1e
- https://github.com/asterisk/asterisk/commit/111487298a954a029daae941eac423f0609b
- https://github.com/asterisk/asterisk/commit/536218a86b797996e8e8844deacc8207de37
- https://github.com/asterisk/asterisk/commit/a89b61d7c756f816c7fa5327ead9e889f153
- https://github.com/asterisk/asterisk/commit/eaa108c68a32c080d7a168ef1d8bf784d5d8
- https://github.com/asterisk/asterisk/commit/eef894282be203cb9e6d8e9692e9c360a0b5
- https://github.com/asterisk/asterisk/commit/fde69a1f3ff17f507a1578ae27b528f43ceb
- 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-vfhr-r9x9-c687
- https://github.com/asterisk/asterisk/tree/24.0.0-pre1
FAQ
What is CVE-2026-57198?
CVE-2026-57198 is a documented vulnerability. Asterisk is an open source private branch exchange and telephony toolkit. In affected deployments, an authenticated attacker may cause a `T.140 RED` heap buffer overflow using carefully crafted packet...
How severe is CVE-2026-57198?
CVSS scoring is not yet available for CVE-2026-57198. Check NVD for updates.
Is there a patch for CVE-2026-57198?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.