CVE-2026-71980 (GCVE-0-2026-71980)
Vulnerability from cvelistv5 – Published: 2026-08-17 17:50 – Updated: 2026-08-17 18:12 X_Open Source
VLAI
EPSS
VEX
Title
Belledonne Communications bcg729 1.1.2 Out-of-Bounds Read via decodeSIDframe()
Summary
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.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-17 18:12 UTC
CWE
- CWE-125 - Out-of-bounds Read
Assigner
VulnCheck
CNA
References
3 references
| URL | Tags |
|---|---|
| https://github.com/BelledonneCommunications/bcg72… | issue-tracking |
| https://www.linphone.org/ | product |
| https://www.vulncheck.com/advisories/belledonne-c… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| BelledonneCommunications | bcg729 |
Affected:
0 , ≤ 1.1.2
(semver)
|
Date Public
2026-08-13 00:00
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