Live › vulnerability › CVE-2026-57198
Go to dashboardAsterisk's chan_sip driver has a heap buffer overflow in T.140 RED text handling, triggered by specially crafted packets. An authenticated attacker may be able to run code on the server or crash Asterisk.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-27 17:32 UTC. All times on this page are UTC.
Only deployments that have chan_sip installed and configured with textsupport enabled are exposed. The sources say chan_sip was deprecated in Asterisk 20 and removed in later versions, so systems on newer tracks without chan_sip can skip it, but the affected release range is not settled.
No product ranges from the sources yet.
asterisk -V to get the installed version.asterisk -rx "module show like chan_sip".textsupport is set to yes in the chan_sip configuration.20.20.1, 21.12.3, 22.10.1 or 23.4.1, or Certified Asterisk 20.7-cert11 or 22.8-cert3.textsupport at its default of no until patched.Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
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.
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