CVE-2026-41416 pjsip CVE debrief

Who should care

Defenders responsible for PJSIP installations, particularly those using versions prior to 2.17, should assess exposure and prioritize updates. Those responsible for PJSIP deployments, especially versions prior to 2.17, should review configurations and verify asymmetric ptime settings. Security teams and vulnerability management teams should also be aware of this vulnerability and its potential impacts on their systems.

Why it matters

Defenders should care about CVE-2026-41416 because it can lead to unexpected application termination or memory corruption in PJSIP installations. Those responsible for PJSIP deployments, especially versions prior to 2.17, should assess exposure and prioritize updates to mitigate potential impacts.

• Unexpected application termination due to undersized buffer allocation
• Memory corruption potentially leading to further exploitation
• Verification of PJSIP version and configuration for asymmetric ptime settings
• Prioritization of updates to version 2.17 or later

Technical summary

The vulnerability is caused by an integer overflow in media stream buffer size calculation when processing SDP with asymmetric ptime configuration. This can lead to unexpected application termination or memory corruption. The issue arises from inadequate buffer allocation, which can be exploited through specially crafted SDP configurations. Defenders should focus on updating to version 2.17 or later and verifying configurations to mitigate this vulnerability. Those responsible for PJSIP deployments should assess exposure and prioritize updates.

Defensive priority

Defenders should prioritize updating to version 2.17 or later to mitigate this vulnerability.

Recommended defensive actions

• Update PJSIP to version 2.17 or later
• Review and verify PJSIP configurations for asymmetric ptime settings
• Monitor for unexpected application termination or memory corruption
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The vulnerability is described in the CVE record and NVD vulnerability detail page. The issue is fixed in version 2.17, according to the vendor. Defenders should verify PJSIP version and configuration for asymmetric ptime settings. Evidence limits suggest that further details may be available through vendor advisories or security research publications.

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.