libde265 — security advisory

{
  "id": "9f6ac5397f8435fcaead52919a2b0213140e78e3d8922666cb95126bc8419270",
  "url": "https://osv.dev/vulnerability/ALPINE-CVE-2026-49346",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ALPINE-CVE-2026-49346",
    "summary": "libde265 is an open source implementation of the h.265 video codec. Prior to version 1.1.0, a crafted H.265 bitstream with large SPS dimensions and 16-bit bit depth causes a signed integer overflow in `de265_image_get_buffer()` (`libde265/image.cc:128`). The overflow wraps the plane allocation size to a small value (~1 KB), but the subsequent `fill_image()` call computes the real size using `size_t`, writing ~4 GB into the undersized heap buffer. Version 1.1.0 patches the issue.",
    "evidence": "osv:ALPINE-CVE-2026-49346",
    "products": [
      {
        "name": {
          "value": "libde265",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.1.3-r0",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "ALPINE-CVE-2026-49346",
      "aliases": [
        "ALPINE-CVE-2026-49346"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.1.3-r0"
                }
              ]
            }
          ],
          "package": {
            "name": "libde265",
            "purl": "pkg:apk/alpine/libde265?arch=source",
            "ecosystem": "Alpine:v3.24"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-49346.json"
          },
          "ecosystem_specific": {}
        }
      ],
      "modified": "2026-10-23T18:30:03.120882314Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-49346"
      ],
      "references": [
        "https://security.alpinelinux.org/vuln/CVE-2026-49346"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-49346",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 424582,
  "published_at": "2026-06-19T21:17:01.847+00:00"
}