CVE-2026-57160 pjsip CVE debrief

Who should care

Defenders responsible for PJSIP-based systems and applications should assess exposure and prioritize verification and patching to prevent potential buffer overflow attacks. This includes reviewing and updating affected systems and applications, monitoring for potential exploitation attempts, and implementing compensating controls. Security teams should track exceptions and retest remediated assets.

Why it matters

The CVE-2026-57160 buffer overflow vulnerability in PJSIP requires defenders to verify and apply patches to prevent potential attacks. Affected systems and applications should be reviewed and updated. Monitoring for potential exploitation attempts is also recommended.

• Potential buffer overflow attacks on PJSIP-based systems and applications
• Verification and patching of affected systems and applications

Technical summary

The `pjsip_generic_array_hdr_print()` function in the PJSIP library is vulnerable to a buffer overflow attack. The function is used to serialize generic array headers, and under certain output-buffer boundary conditions, it can write one byte past the end of the buffer. This vulnerability can be exploited by a remote peer to influence the serialized message. The issue has been patched via commit `d6a0e7f`. Affected systems and applications should be reviewed and updated. The vulnerability can occur under certain output-buffer boundary conditions, allowing a remote peer to influence the serialized message.

Defensive priority

Defenders should prioritize verifying and applying the patch to prevent potential buffer overflow attacks.

Recommended defensive actions

• Verify and apply the patch to prevent potential buffer overflow attacks
• Review and update affected systems and applications
• Monitor for potential exploitation attempts
• Perform vulnerability scanning
• Implement compensating controls
• Track exceptions and retest remediated assets
• Review security advisories

Evidence notes

The vulnerability is described in the CVE record and the NVD vulnerability detail page. The patch is available in the PJSIP repository. Defenders should verify the patch and review affected systems and applications. The vulnerability can be exploited by a remote peer to influence the serialized message. Evidence limits are based on CVE and NVD details.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.