CVE-2026-57189

low

Description

Asterisk is an open source private branch exchange and telephony toolkit. In affected deployments, an authenticated attacker may cause a `T.140 RED` out-of-bounds write during `generation accumulation` 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.

References

https://github.com/asterisk/asterisk/tree/24.0.0-pre1

https://github.com/asterisk/asterisk/security/advisories/GHSA-j2mm-57pq-jh94

https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3

https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11

https://github.com/asterisk/asterisk/releases/tag/23.4.1

https://github.com/asterisk/asterisk/releases/tag/22.10.1

https://github.com/asterisk/asterisk/releases/tag/21.12.3

https://github.com/asterisk/asterisk/releases/tag/20.20.1

https://github.com/asterisk/asterisk/commit/fde69a1f3ff17f507a1578ae27b528f43ceb5efd

https://github.com/asterisk/asterisk/commit/eef894282be203cb9e6d8e9692e9c360a0b569b4

https://github.com/asterisk/asterisk/commit/eaa108c68a32c080d7a168ef1d8bf784d5d830f4

https://github.com/asterisk/asterisk/commit/a89b61d7c756f816c7fa5327ead9e889f1531202

https://github.com/asterisk/asterisk/commit/536218a86b797996e8e8844deacc8207de373701

https://github.com/asterisk/asterisk/commit/111487298a954a029daae941eac423f0609b1261

https://github.com/asterisk/asterisk/commit/0601c33d4edf8c8f221de91cead59460fb1e7180

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-111221

Details

Source: Mitre, NVD

Published: 2026-10-27

Updated: 2026-10-28

Risk Information

CVSS v2

Base Score: 4.9

Vector: CVSS2#AV:N/AC:M/Au:S/C:P/I:N/A:P

Severity: Medium

CVSS v3

Base Score: 8.8

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity: High

CVSS v4

Base Score: 2.3

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

Severity: Low

EPSS

EPSS: 0.00737