CVE-2021-43610

HIGH 7.5CVE-2021-43610 · Published 12/11/2021 · updated 17/06/2026

In short

CVE-2021-43610 is a HIGH (CVSS 7.5) vulnerability affecting belle-sip (linphone).
Chance of exploitation in the next 30 days (EPSS): 1.2%, higher than 68.1% of all vulnerabilities.
Fix: update to 5.0.20 or later.

Package	Affected versions	Patched versions
belle-sip linphone	`< 5.0.20`	`5.0.20`

Description

Belledonne Belle-sip before 5.0.20 can crash applications such as Linphone via an invalid From header (request URI without a parameter) in an unauthenticated SIP message, a different issue than CVE-2021-33056.

References

BelledonneCommunications/belle-sip commit d3f0651 · Patch
BelledonneCommunications/belle-sip · Patch

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