CVE-2022-39244 | Buffer overflow in pjlib scanner and pjmedia

PJSIP is a free and open source multimedia communication library written in C. In versions of PJSIP prior to 2.13 the PJSIP parser, PJMEDIA RTP decoder, and PJMEDIA SDP parser are affeced by a buffer overflow vulnerability. Users connecting to untrusted clients are at risk. This issue has been patched and is available as commit c4d3498 in the master branch and will be included in releases 2.13 and later. Users are advised to upgrade. There are no known workarounds for this issue.

Published: 2022-10-06 Last update: 2025-11-04 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2022-39244 is rated Moderate Risk (47.6/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.27%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2022-39244

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-01-16 0.22% 0.27% +0.05%
2 2025-11-21 1.13% 0.22% -0.91%
3 2025-11-18 — 1.13% —

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2022-39244

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.6 5.9 [email protected]
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]

Weakness enumeration for CVE-2022-39244

OS Trackers for CVE-2022-39244

vendor priority summary link
alpine high CVE-2022-39244: 1 source package rows (pjproject); 26 state rows across 6 repos (3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 6, open 20. https://security.alpinelinux.org/vuln/CVE-2022-39244
debian not yet assigned CVE-2022-39244 not yet assigned priority: Debian including 2 source packages (asterisk, ring), 4 status rows across 3 suites (bookworm, bullseye, sid): resolved 4. https://security-tracker.debian.org/tracker/CVE-2022-39244
gentoo normal CVE-2022-39244: 1 GLSA(s) (202210-37), 1 atom(s) (net-libs/pjproject); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2022-39244
ubuntu medium CVE-2022-39244 medium priority: Ubuntu including 3 source packages (asterisk, pjproject, ring), 33 status rows across 13 suites (bionic, focal, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): ignored 12, DNE 9, needs-triage 5, released 3, needed 2, not-affected 2. https://ubuntu.com/security/CVE-2022-39244

Affected software / configurations for CVE-2022-39244

Vendor Product Version Raw CPE
pjsip pjsip < 2.13 cpe:2.3:a:pjsip:pjsip:*:*:*:*:*:*:*:*

References for CVE-2022-39244

cvelogic Threat Intelligence