CVE-2026-57184

Asterisk: Out-of-Bounds Read in Q.931 Information Element Parser (H.323 Addon)

MEDIUM
6.3
CVSS Score
Published: October 26, 2026 at 07:53 PM UTC
Updated: October 29, 2026 at 02:16 AM UTC
2 products affected across 1 vendorAsteriskCertified Asterisk

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Severity
MEDIUM6.3
Exploit prediction
EPSS 0.6%
SSVC
No known exploit

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, insufficient bounds checking in the `chan_ooh323` `Q.931` `information-element parser` permits an `out-of-bounds read` that may allow an unauthenticated attacker to crash Asterisk using carefully crafted `setup packets`. The `chan_ooh323` addon channel driver must be explicitly compiled and installed, which is not the default, and its port must be publicly reachable. 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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 20.20.121.0.0-pre1 ≤ v < 21.12.322.0.0-pre1 ≤ v < 22.10.123.0.0-pre1 ≤ v < 23.4.121.0.0-pre122.0.0-pre123.0.0-pre1
v < 20.7-cert1122.8-cert1-pre1 ≤ v < 22.8-cert322.8-cert1-pre1

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.3MEDIUMGitHub_M
Vector?

Quick Info

StatusUNDERGOING ANALYSIS
CWE
CWE-125

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