PJSIP competition condition issue vulnerability

PJSIP is a free and open source multimedia communications library written in C that implements standards-based protocols such as SIP, SDP, RTP, STUN, TURN, and ICE.A contention problem vulnerability exists in PJSIP, which stems from improper handling of concurrent access when concurrent code needs to access shared resources mutually during the operation of a networked system or product The vulnerability can be exploited by an attacker to cause a denial of service.