{"id":"UBUNTU-CVE-2026-57194","details":"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 out-of-bounds write in `chan_unistim` `DIALPAGE` digit handling can overflow the `phone_number` field and crash Asterisk when an attacker sends a carefully crafted incoming request packet. The `chan_unistim` module must be loaded and configured with a valid `UNISTIM UDP port` that the attacker can reach. The attacker must register as a configured `phone MAC`, or the deployment must have an equivalent `production/autoprovisioning` path that allows the client to reach the main page. 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.","modified":"2026-10-28T20:17:47.766644427Z","published":"2026-10-27T17:17:00Z","upstream":["CVE-2026-57194"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-57194"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-57194"},{"type":"REPORT","url":"https://github.com/asterisk/asterisk/security/advisories/GHSA-3g56-cgrh-95p5"},{"type":"REPORT","url":"https://github.com/asterisk/asterisk/commit/430f423c84e4e32a462d907632b66c9793236e96"},{"type":"REPORT","url":"https://github.com/asterisk/asterisk/commit/6da8e10c210d8e014c27c67235252e1dfc794446"},{"type":"REPORT","url":"https://github.com/asterisk/asterisk/commit/6f414ec771eaa3318a4b2d28f70fa387196ae283"},{"type":"REPORT","url":"https://github.com/asterisk/asterisk/commit/ce6e2233599b76bc30c33b4816b15609c8ddc8b6"},{"type":"REPORT","url":"https://github.com/asterisk/asterisk/commit/d803b5370b05f39a6241b2556eb9894b02148e6a"},{"type":"REPORT","url":"https://github.com/asterisk/asterisk/commit/fc3a1cb3c386c962bfca8cd9d533d1390d4ad933"},{"type":"REPORT","url":"https://github.com/asterisk/asterisk/commit/ff65e4b0867bee12cdcb3a6219b976ee7ee08963"},{"type":"REPORT","url":"https://github.com/asterisk/asterisk/releases/tag/20.20.1"},{"type":"REPORT","url":"https://github.com/asterisk/asterisk/releases/tag/21.12.3"},{"type":"REPORT","url":"https://github.com/asterisk/asterisk/releases/tag/22.10.1"},{"type":"REPORT","url":"https://github.com/asterisk/asterisk/releases/tag/23.4.1"},{"type":"REPORT","url":"https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11"},{"type":"REPORT","url":"https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3"},{"type":"REPORT","url":"https://github.com/asterisk/asterisk/tree/24.0.0-pre1"}],"affected":[{"package":{"name":"asterisk","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/asterisk?arch=source&distro=esm-apps%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:13.1.0~dfsg-1.1ubuntu3","1:13.1.0~dfsg-1.1ubuntu4","1:13.1.0~dfsg-1.1ubuntu4.1","1:13.1.0~dfsg-1.1ubuntu4.1+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"asterisk","binary_version":"1:13.1.0~dfsg-1.1ubuntu4.1+esm1"},{"binary_version":"1:13.1.0~dfsg-1.1ubuntu4.1+esm1","binary_name":"asterisk-config"},{"binary_name":"asterisk-dahdi","binary_version":"1:13.1.0~dfsg-1.1ubuntu4.1+esm1"},{"binary_name":"asterisk-mobile","binary_version":"1:13.1.0~dfsg-1.1ubuntu4.1+esm1"},{"binary_version":"1:13.1.0~dfsg-1.1ubuntu4.1+esm1","binary_name":"asterisk-modules"},{"binary_version":"1:13.1.0~dfsg-1.1ubuntu4.1+esm1","binary_name":"asterisk-mp3"},{"binary_name":"asterisk-mysql","binary_version":"1:13.1.0~dfsg-1.1ubuntu4.1+esm1"},{"binary_name":"asterisk-ooh323","binary_version":"1:13.1.0~dfsg-1.1ubuntu4.1+esm1"},{"binary_name":"asterisk-voicemail","binary_version":"1:13.1.0~dfsg-1.1ubuntu4.1+esm1"},{"binary_name":"asterisk-voicemail-imapstorage","binary_version":"1:13.1.0~dfsg-1.1ubuntu4.1+esm1"},{"binary_version":"1:13.1.0~dfsg-1.1ubuntu4.1+esm1","binary_name":"asterisk-voicemail-odbcstorage"},{"binary_name":"asterisk-vpb","binary_version":"1:13.1.0~dfsg-1.1ubuntu4.1+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-57194.json"}},{"package":{"name":"asterisk","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/asterisk?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:13.17.2~dfsg-1ubuntu1","1:13.17.2~dfsg-2ubuntu1","1:13.18.1~dfsg-1ubuntu1","1:13.18.3~dfsg-1ubuntu1","1:13.18.3~dfsg-1ubuntu2","1:13.18.3~dfsg-1ubuntu3","1:13.18.3~dfsg-1ubuntu4"],"ecosystem_specific":{"binaries":[{"binary_name":"asterisk","binary_version":"1:13.18.3~dfsg-1ubuntu4"},{"binary_version":"1:13.18.3~dfsg-1ubuntu4","binary_name":"asterisk-config"},{"binary_version":"1:13.18.3~dfsg-1ubuntu4","binary_name":"asterisk-dahdi"},{"binary_version":"1:13.18.3~dfsg-1ubuntu4","binary_name":"asterisk-mobile"},{"binary_name":"asterisk-modules","binary_version":"1:13.18.3~dfsg-1ubuntu4"},{"binary_version":"1:13.18.3~dfsg-1ubuntu4","binary_name":"asterisk-mp3"},{"binary_name":"asterisk-mysql","binary_version":"1:13.18.3~dfsg-1ubuntu4"},{"binary_name":"asterisk-ooh323","binary_version":"1:13.18.3~dfsg-1ubuntu4"},{"binary_version":"1:13.18.3~dfsg-1ubuntu4","binary_name":"asterisk-tests"},{"binary_version":"1:13.18.3~dfsg-1ubuntu4","binary_name":"asterisk-voicemail"},{"binary_name":"asterisk-voicemail-imapstorage","binary_version":"1:13.18.3~dfsg-1ubuntu4"},{"binary_name":"asterisk-voicemail-odbcstorage","binary_version":"1:13.18.3~dfsg-1ubuntu4"},{"binary_version":"1:13.18.3~dfsg-1ubuntu4","binary_name":"asterisk-vpb"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-57194.json"}},{"package":{"name":"asterisk","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/asterisk?arch=source&dis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