Stack-based buffer overflow in pjsip - CVE-2026-40892
Published: April 14, 2026
Vulnerability identifier: #VU125902
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-40892
CWE-ID: CWE-121
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to stack-based buffer overflow in pjsip_auth_create_digest2() when processing application-provided pre-computed digest credentials. A local user can supply oversized credential data to cause a denial of service.
Only applications that use the PJSIP_CRED_DATA_DIGEST credential type and pass attacker-influenced data through cred_info->data are vulnerable. This is not remotely exploitable through standard SIP protocol handling.
Affected software
pjsip
How to mitigate CVE-2026-40892
Install security update from vendor's website.
pjsip - update to 2.17