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Fencer Vulns
high 7.5

CVE-2026-57186 json

Asterisk: CVE-2022-37325 fix is absent from current chan_ooh323 Q.931 party-number parser

published 2026-10-27 12 d ago modified 2026-10-28 11 d ago also EUVD-2026-111395

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 49%
public exploits
0
none known

Summary

Asterisk is an open source private branch exchange and telephony toolkit. From 21.0.0-pre1 until Asterisk 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 22.8-cert3, the `chan_ooh323` `Q.931 party-number parser` lacks the `CVE-2022-37325` fix because that fix was never forward-ported from Asterisk 20 to later versions. Malformed Q.931 elements in an `OOH323 request` can therefore crash Asterisk. This issue affects Asterisk versions greater than 20. 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 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 22.8-cert3.

Patch / fix

  • digium certified_asterisk 21.12.3, 22.8-cert3, 22.10.1, 23.4.1
  • sangoma certified_asterisk 21.12.3, 22.8-cert3, 22.10.1, 23.4.1
  • digium asterisk 21.12.3, 22.10.1, 23.4.1
  • asterisk open_source 21.12.3, 22.10.1, 23.4.1
  • asterisk certified_asterisk 21.12.3, 22.8-cert3, 22.10.1, 23.4.1
  • asterisk Debian 14 1:22.10.1+dfsg+~cs6.17.60671434-1

debian advisories DEBIAN-CVE-2026-57186

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-57186 updated cvss 7.5

asterisk: asterisk: Denial of Service via malformed Q.931 elements in chan_ooh323

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
12 d ago

Exploit prediction

0.60% chance of exploitation in the next 30 days, higher than 49% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • asterisk asterisk
  • asterisk certified-asterisk

Classification

Weakness
  • CWE-839 Numeric Range Comparison Without Minimum Check

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.