Security1 hOctober 24, 2026, 00:45

Signal RingRTC CVE-2026-113380 lets callers block hang-ups

CVE-2026-113380, rated CVSS 9.3, in Signal's RingRTC calling library lets a call peer saturate the FSM event queue and block hang-up processing. Audio and in some cases video may keep transmitting after the user ends the call. The flaw is fixed in RingRTC 2.72.0.

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Open source

CVE-2026-113380 carries a CVSS score of 9.3
FSM queue saturation blocks hang-up processing
Audio and sometimes video may continue after hang-up
The fix shipped in RingRTC 2.72.0

#Signal#RingRTC

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