Description
PJSIP is a free and open source multimedia communication library written in C. In 2.16 and earlier, a buffer overflow vulnerability exists in PJNATH ICE Session when processing credentials with excessively long usernames.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| pjsip | pjproject | <= 2.16 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | asterisk | 1:22.10.0+dfsg+~cs6.17.60671434-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 18.04 LTS | pjproject | 2.7.2~dfsg-1ubuntu0.1~esm1 | — |
| Ubuntu Pro 16.04 LTS | pjproject | 2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1 | — |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | pjproject | 2.17-r0 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- PJPROJECT 2.16 - Heap Bufferoverflow EDB-52561 · webapps · May 14, 2026
GitHub 1 repository
-
VABISMO/cve-2026-25994_PJSIP ★ 2 · Apr 7, 2026
PJSIP cve-2026-25994 BUFFER OVERFLOW POC
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 1
- WID-SEC-2026-1378 Asterisk (pjproject): Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 4, 2026