{"id":"CVE-2026-71980","title":"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 boundar…","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 boundar…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-125"],"published":"2026-08-17","updated":"2026-09-24","sourceUpdated":"2026-09-24T20:06:30.133","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-71980","references":[{"url":"https://github.com/BelledonneCommunications/bcg729/issues/23","label":"disclosure@vulncheck.com"},{"url":"https://www.linphone.org/","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/belledonne-communications-bcg729-out-of-bounds-read-via-decodesidframe","label":"disclosure@vulncheck.com"},{"url":"https://github.com/BelledonneCommunications/bcg729/issues/23","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd"],"epss":0.00609,"epssPercentile":0.46848,"ingestedAt":"2026-09-24T20:51:40.205Z","slug":"CVE-2026-71980","body":"## Overview\n\nBelledonne 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}