{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "1.1.2"
              },
              {
                "introduced": "bcg729"
              },
              {
                "fixed": "1.1.2"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "DESCRIPTION"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "fb195811fe630415c9bf433c0c0bebde14314ff2"
            }
          ],
          "repo": "https://github.com/belledonnecommunications/bcg729",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-125"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71980.json"
  },
  "details": "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.",
  "id": "CVE-2026-71980",
  "modified": "2026-08-19T03:31:10.561374138Z",
  "published": "2026-08-17T17:50:41.205Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://www.linphone.org/"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71980.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-71980"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/belledonne-communications-bcg729-out-of-bounds-read-via-decodesidframe"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/BelledonneCommunications/bcg729/issues/23"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/BelledonneCommunications/bcg729"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Belledonne Communications bcg729 1.1.2 Out-of-Bounds Read via decodeSIDframe()"
}