CVE-2026-57189
LOWAttack Surface
CVSS Vector Breakdown
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.
Weakness Classification (1)
Affected Software (12)
| Vendor | Product | Version |
|---|---|---|
| asterisk | asterisk | < 20.20.1 |
| asterisk | asterisk | >= 21.0.0-pre1, < 21.12.3 |
| asterisk | asterisk | >= 22.0.0-pre1, < 22.10.1 |
| asterisk | asterisk | >= 23.0.0-pre1, < 23.4.1 |
| asterisk | asterisk | < 20.20.1 |
| asterisk | asterisk | >= 21.0.0-pre1, < 21.12.3 |
| asterisk | asterisk | >= 22.0.0-pre1, < 22.10.1 |
| asterisk | asterisk | >= 23.0.0-pre1, < 23.4.1 |
| asterisk | certified-asterisk | < 20.7-cert11 |
| asterisk | certified-asterisk | >= 22.8-cert1-pre1, < 22.8-cert3 |
| asterisk | certified-asterisk | < 20.7-cert11 |
| asterisk | certified-asterisk | >= 22.8-cert1-pre1, < 22.8-cert3 |