Vulnerability Description
Belledonne Communications bcg729 through 1.1.2 contains an out-of-bounds read vulnerability in the decodeSIDframe() function in src/cng.c that allows unauthenticated network-adjacent attackers to trigger a heap read beyond buffer boundaries by sending a zero-length comfort-noise RTP payload. A zero-length payload causes an integer underflow in the uint8_t filter order calculation, which wraps to 255 and is clamped to 10, causing the function to unconditionally read 11 bytes from a zero-byte buffer, resulting in media process termination or silent consumption of adjacent heap memory as reflection coefficients.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/BelledonneCommunications/bcg729/issues/23
- https://www.linphone.org/
- https://www.vulncheck.com/advisories/belledonne-communications-bcg729-out-of-bou
- https://github.com/BelledonneCommunications/bcg729/issues/23
FAQ
What is CVE-2026-71980?
CVE-2026-71980 is a vulnerability with a CVSS score of 7.5 (HIGH). Belledonne Communications bcg729 through 1.1.2 contains an out-of-bounds read vulnerability in the decodeSIDframe() function in src/cng.c that allows unauthenticated network-adjacent attackers to trig...
How severe is CVE-2026-71980?
CVE-2026-71980 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-71980?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.