What is CVE-2022-24793?

CVE-2022-24793 is a high-severity vulnerability in Pjsip Pjproject, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2022-04-06.

How severe is CVE-2022-24793?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Pjsip Pjproject

CVE-2022-24793

PJSIP is a free and open source multimedia communication library written in C. A buffer overflow vulnerability in versions 2.12 and prior affects applications that use PJSIP DNS resolution. It doesn't affect PJSIP users who utilize an external resolver. This vulnerability is related to CVE-2023-27585. The difference is that this issue is in parsing the query record `parse_rr()`, while the issue in CVE-2023-27585 is in `parse_query()`. A patch is available in the `master` branch of the `pjsip/pjproject` GitHub repository. A workaround is to disable DNS resolution in PJSIP config (by setting `nameserver_count` to zero) or use an external resolver instead.

Vulnerability class: Buffer Overflow

Published 2022-04-06 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.022 (81.6th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 81.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.022 · newest: 0.022 · change: -0.000

Affected products

Pjsip Pjproject — versions <= 2.12
Pjsip
Debian Linux — versions 9.0, 10.0, 11.0

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

github.com/pjsip/pjproject/security/advisories/GHSA-p6g5-v97c-w5q4 (Patch, Third Party Advisory)
github.com/pjsip/pjproject/commit/9fae8f43accef8ea65d4a8ae9cdf297c46cfe29a (Patch, Third Party Advisory)
lists.debian.org/debian-lts-announce/2022/05/msg00047.html (mailing-list, Mailing List, Third Party Advisory)
security.gentoo.org/glsa/202210-37 (vendor-advisory, Third Party Advisory)
lists.debian.org/debian-lts-announce/2022/11/msg00021.html (mailing-list, Mailing List, Third Party Advisory)
www.debian.org/security/2022/dsa-5285 (vendor-advisory, Third Party Advisory)
lists.debian.org/debian-lts-announce/2023/08/msg00038.html (mailing-list)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2022-24793?: CVE-2022-24793 is a high-severity vulnerability in Pjsip Pjproject, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2022-04-06.
How severe is CVE-2022-24793?: High severity. CVSS v3 base score is 7.5 out of 10.