High · CVSS 7.5CVE-2026-71980

Belledonne Communications bcg729 1.1.2 Out-of-Bounds Read via decodeSIDframe()

Answer in brief

CVE-2026-71980 records a High severity (CVSS 7.5) vulnerability in Belledonne Communications bcg729 1.1.2 Out-of-Bounds Read via decodeSIDframe(). The current sources do not mark it as known exploited. The current feed maps BelledonneCommunications/bcg729 (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 17, 2026Updated Sep 24, 2026Source checked Oct 1, 2026First seen by HOL Aug 17, 2026Material review Sep 24, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.5
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps BelledonneCommunications/bcg729 (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
BelledonneCommunications/bcg729generic	0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for BelledonneCommunications/bcg729.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 24, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 17, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.