CVE-2026-28799

A flaw was found in PJSIP. A remote attacker can exploit a heap use-after-free vulnerability within the event subscription framework by sending a specially crafted message during presence unsubscription. This can lead to a denial of service, making the affected system unavailable. Mitigation...

UBUNTU-CVE-2026-28799

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 i...