CVE-2022-42705

What it is

A use-after-free in res_pjsip_pubsub.c in Sangoma Asterisk 16.28, 18.14, 19.6, and certified/18.9-cert2 may allow a remote authenticated attacker to crash Asterisk (denial of service) by performing activity on a subscription via a reliable transport at the same time that Asterisk is also performing activity on that subscription.

At a glance

Exploitability

Can be exploited over the network with a low-privilege account. High risk of service disruption.

Exploit odds

1.3% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2022-12-05 21:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 05:05 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 1.3% in the next 30 days (EPSS).
• Severity: 6.5 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2022-12-05 21:15 UTC

Last modified

2026-06-17 05:05 UTC

Exploit probability

1.3% · EPSS, next 30 days

Weakness

CWE-416 · Use after free

Record status

Modified

Affected

• Sangoma Asterisk < 16.29.1
• Sangoma Asterisk < 18.15.1
• Sangoma Asterisk < 19.7.1
• Sangoma Asterisk 20.0.0
• Sangoma Certified Asterisk 18.9

Attack profile CVSS 3.1 · 6.5

Attack vector

Network

Complexity

Low

Privileges needed

Low

User interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2022-42705.md and follow it. Check whether this project is affected by CVE-2022-42705. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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