CVE-2026-57184: Asterisk out-of-bounds read in chan_ooh323 Q.931 parser

CVE-2026-57184 · Severity: info · Published 2026-10-26

Asterisk is a private branch exchange (PBX) and telephony toolkit used by organizations to manage voice and video communications. The chan_ooh323 addon driver, when explicitly compiled and installed with a publicly reachable port, contains insufficient bounds checking that allows an unauthenticated attacker to crash Asterisk by sending specially crafted setup packets. This results in denial of service to telephony services.

Technologies: Asterisk, Asterisk Certified Asterisk. Vendors: Asterisk.

Quick answers

Is CVE-2026-57184 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-57184 being exploited in the wild.
How severe is CVE-2026-57184?
Informational severity, published 26 October 2026.
Which products and versions are affected?
Asterisk Prior to 20.20.1, 21.12.3, 22.10.1, 23.4.1; Asterisk Certified Asterisk Prior to 20.7-cert11, 22.8-cert3.
Is there a fix for CVE-2026-57184?
Yes: fixed in Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1; Certified Asterisk 20.7-cert11, 22.8-cert3. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-57184 attacked?
It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-57184?
Check whether you run Asterisk or Asterisk Certified Asterisk at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • Fixed in: Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1; Certified Asterisk 20.7-cert11, 22.8-cert3

Technical details

An out-of-bounds read vulnerability exists in the Q.931 information-element parser within the chan_ooh323 channel driver (ooq931.c). The vulnerability stems from insufficient bounds checking in the ooQ931Decode function when parsing incoming setup packets. An unauthenticated attacker on the network can trigger the out-of-bounds read by sending crafted packets, causing a crash; no authentication or user interaction is required.

Affected products

  • Asterisk Asterisk Prior to 20.20.1, 21.12.3, 22.10.1, 23.4.1
  • Asterisk Certified Asterisk Prior to 20.7-cert11, 22.8-cert3

Timeline

  • 2026-10-26: disclosed

References

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