Out-of-bounds read in pjsip - #VU165884
Published: November 11, 2026
Vulnerability identifier: #VU165884
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to expose uninitialised stack memory through locally played UWB 24 kbit/s audio or cause memory-checking builds to abort.
The vulnerability exists due to out-of-bounds reads from unchecked power indices and incomplete coefficient initialisation in the bundled G.722.1 decoder when processing malformed frames. A remote attacker can send a single crafted RTP packet during a call negotiating G.722.1 to trigger these effects, without memory contents being returned to the peer.
Affected software
pjsip
Remediation
Install security update from vendor's website.
pjsip - update to 2.18