What is CVE-2022-31003?

CVE-2022-31003 is a critical-severity vulnerability in Freeswitch Sofia-Sip, classified under Heap-based Buffer Overflow. CVSS score: 9.1/10. Published 2022-05-31.

How severe is CVE-2022-31003?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Is CVE-2022-31003 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Freeswitch Sofia-Sip

CVE-2022-31003

Sofia-SIP is an open-source Session Initiation Protocol (SIP) User-Agent library. Prior to version 1.13.8, when parsing each line of a sdp message, `rest = record + 2` will access the memory behind `\0` and cause an out-of-bounds write. An attacker can send a message with evil sdp to FreeSWITCH, causing a crash or more serious consequence, such as remote code execution. Version 1.13.8 contains a patch for this issue.

Vulnerability class: Buffer Overflow

Published 2022-05-31 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.

EPSS exploit prediction

EPSS: 0.038 (89.8th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 89.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.038 · newest: 0.038 · change: 0.000

Affected products

Freeswitch Sofia-Sip — versions < 1.13.8
Signalwire Sofia-Sip
Debian Linux — versions 10.0

Weakness classification (CWE)

Public proof-of-concept exploits

DiRaltvein/memory-corruption-examples

References

github.com/freeswitch/sofia-sip/security/advisories/GHSA-8w5j-6g2j-pxcp (Exploit, Third Party Advisory)
github.com/freeswitch/sofia-sip/commit/907f2ac0ee504c93ebfefd676b4632a3575908c9 (Patch, Third Party Advisory)
lists.debian.org/debian-lts-announce/2022/09/msg00001.html (mailing-list, Mailing List, Third Party Advisory)
security.gentoo.org/glsa/202210-18 (vendor-advisory, Third Party Advisory)
www.debian.org/security/2023/dsa-5410 (vendor-advisory)

Frequently asked questions

What is CVE-2022-31003?: CVE-2022-31003 is a critical-severity vulnerability in Freeswitch Sofia-Sip, classified under Heap-based Buffer Overflow. CVSS score: 9.1/10. Published 2022-05-31.
How severe is CVE-2022-31003?: Critical severity. CVSS v3 base score is 9.1 out of 10.
Is CVE-2022-31003 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.