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CVE-2026-71980— Belledonne Communications bcg729 1.1.2 Out-of-Bounds Read via decodeSIDframe()

Quick assessment

Affected
BelledonneCommunications bcg729
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Belledonne Communications Bcg729是Belledonne Communications组织的一款语音编码解码组件。 Belledonne Communications Bcg729 1.1.2及之前版本存在缓冲区错误漏洞，该漏洞源于decodeSIDframe()函数处理零长度舒适噪声RTP载荷时存在整数下溢，导致越界堆读取，可能造成媒体进程终止或静默消耗相邻堆内存。

CVSS 7.5 · High EPSS 0.34% · P26

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
BelledonneCommunications bcg729 ≤ 1.1.2 affected
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I. Basic Information for CVE-2026-71980

Vulnerability Information
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Vulnerability Title
Belledonne Communications bcg729 1.1.2 Out-of-Bounds Read via decodeSIDframe()
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
Belledonne Communications Bcg729 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Belledonne Communications Bcg729是Belledonne Communications组织的一款语音编码解码组件。 Belledonne Communications Bcg729 1.1.2及之前版本存在缓冲区错误漏洞，该漏洞源于decodeSIDframe()函数处理零长度舒适噪声RTP载荷时存在整数下溢，导致越界堆读取，可能造成媒体进程终止或静默消耗相邻堆内存。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
BelledonneCommunications bcg729 0 ~ 1.1.2 -

II. Public POCs for CVE-2026-71980

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 11301 chars
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Exploit chain & mitigation
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III. Intelligence Information for CVE-2026-71980

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Vendor Advisories for CVE-2026-71980 (2)

Vendor Pages for CVE-2026-71980 (1)

IV. Related Vulnerabilities

Same weakness: CWE-125

V. Comments for CVE-2026-71980

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