Vulnerability · Published Oct 27, 2026 · Assigned by GitHub_M
CVE-2026-57195Asterisk: NULL Pointer Dereference in HTTP AMI Digest Authentication
High 7.5
In plain English
A high-severity null pointer dereference in asterisk from asterisk. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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, a NULL pointer dereference in the `Asterisk Manager Interface (AMI)` may allow an unauthenticated attacker to crash Asterisk when `Digest Authentication` is used via `HTTP`. The Asterisk `HTTP` web server, AMI, and AMI access via `HTTP` must all be enabled; each is disabled by default. The attacker must be able to connect to the `HTTP` server, which binds only to `127.0.0.1` by default even when enabled. 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:14 | asterisk | 1:22.10.1+dfsg+~cs6.17.60671434-1 | DEBIAN-CVE-2026-57195 |
| Ubuntu:22.04:LTS | asterisk | no fix listed | UBUNTU-CVE-2026-57195 |
| Ubuntu:24.04:LTS | asterisk | no fix listed | UBUNTU-CVE-2026-57195 |
| Ubuntu:26.04:LTS | asterisk | no fix listed | UBUNTU-CVE-2026-57195 |
| Ubuntu:26.10 | asterisk | no fix listed | UBUNTU-CVE-2026-57195 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| asterisk | asterisk | < 20.20.1>= 21.0.0-pre1, < 21.12.3>= 22.0.0-pre1, < 22.10.1>= 23.0.0-pre1, < 23.4.1 |
| asterisk | certified-asterisk | < 20.7-cert11>= 22.8-cert1-pre1, < 22.8-cert3 |
Weakness: CWE-476 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- https://github.com/asterisk/asterisk/security/advisories/GHSA-3rhj-hhw7-m6fw x_refsource_CONFIRM
- https://github.com/asterisk/asterisk/commit/10c5b2efcacab03bf04a229f81cc24e76fe42c41 x_refsource_MISC
- https://github.com/asterisk/asterisk/commit/362ef847e7e057b7626e476ddcfe7328ea314db4 x_refsource_MISC
- https://github.com/asterisk/asterisk/commit/5d5d8d8ef7f16774820b1889ae73d8d2ab14af45 x_refsource_MISC
- https://github.com/asterisk/asterisk/commit/87a1f43e4c465b885163665aa89172ed0f392663 x_refsource_MISC
- https://github.com/asterisk/asterisk/commit/a1fcfdf9b91ed58cc8fb9da8d135da60bae7345d x_refsource_MISC
- https://github.com/asterisk/asterisk/commit/abba42c58fee2226a709583afdbeec75cf1dde8b x_refsource_MISC
- https://github.com/asterisk/asterisk/commit/fff89162cdd702e8a143701f138edd8dceab154f x_refsource_MISC
- https://github.com/asterisk/asterisk/releases/tag/20.20.1 x_refsource_MISC
- https://github.com/asterisk/asterisk/releases/tag/21.12.3 x_refsource_MISC
- https://github.com/asterisk/asterisk/releases/tag/22.10.1 x_refsource_MISC
- https://github.com/asterisk/asterisk/releases/tag/23.4.1 x_refsource_MISC
- https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11 x_refsource_MISC
- https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3 x_refsource_MISC
- https://github.com/asterisk/asterisk/tree/24.0.0-pre1 x_refsource_MISC