Description
PJSIP is a free and open source multimedia communication library written in C. Prior to version 2.17, a heap use-after-free vulnerability exists in PJSIP's event subscription framework (evsub.c) that is triggered during presence unsubscription (SUBSCRIBE with Expires=0). This issue has been patched in version 2.17.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| pjsip | pjproject | < 2.17 | — |
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 | No fix yet | — |
| Ubuntu Pro 16.04 LTS | pjproject | No fix yet | — |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | pjproject | 2.17-r0 | — |
Advisories 1
- WID-SEC-2026-1378 Asterisk (pjproject): Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 4, 2026