Fix CVE(s): CVE-2021-4156, CVE-2022-33065, CVE-2025-52194

{
  "id": "8f26b6bd5d8c914d6f3015399f3ae3740bb3c2bed565286f07947c257468f7a8",
  "url": "https://osv.dev/vulnerability/CLSA-2026-1788170819",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Fix CVE(s): CVE-2021-4156, CVE-2022-33065, CVE-2025-52194",
    "summary": "* SECURITY UPDATE: multiple signed integer overflows in the AU, MAT4/MAT5, AVR, SDS, AIFF, IRCAM, RF64, PCM and IMA-ADPCM header parsers allow denial of service via a crafted file (ELSCVE-171688) - debian/patches/CVE-2022-33065/CVE-2022-33065-{1..8,11..13}.patch: widen the overflowing data_end, blockwidth and sample-count calculations to sf_count_t in src/au.c, src/mat4.c, src/mat5.c, src/avr.c, src/sds.c, src/aiff.c, src/ircam.c, src/common.h, src/common.c, src/pcm.c, src/rf64.c and src/ima_adpcm.c. Byte-identical to Ubuntu's own patches as shipped in the public focal security source 1.0.28-7ubuntu0.3 (same upstream 1.0.28, same 13-patch prefix); the bionic +esm1 artifact itself is Ubuntu Pro-gated. Note that Ubuntu's CVE-2022-33065-13.patch is a squash of three upstream commits rather than the single one its header names: 3970faeb (IMA ADPCM nibble sizing) and 7e6cc7cb (stepindx initialisation) are prerequisites that 1.0.28 predates, alongside the cited 9f097e49 which carries the CVE-2022-33065 fix proper; all three are credited in that patch's provenance note. - CVE-2022-33065 * SECURITY UPDATE: out-of-bounds read in the FLAC decoder when a frame fails to decode and the stale frame pointer is reused (ELSCVE-171682) - debian/patches/CVE-2021-4156.patch: NULL pflac->frame when FLAC__stream_decoder_process_single() fails in flac_read_loop() in src/flac.c. Byte-identical to Ubuntu's own patch as shipped in the public focal security source 1.0.28-7ubuntu0.3; upstream commit ced",
    "evidence": "osv:CLSA-2026-1788170819",
    "products": [
      {
        "name": {
          "value": "libsndfile1",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.0.28-4ubuntu0.18.04.2+tuxcare.els1",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "libsndfile1-dev",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.0.28-4ubuntu0.18.04.2+tuxcare.els1",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "sndfile-programs",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.0.28-4ubuntu0.18.04.2+tuxcare.els1",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CLSA-2026-1788170819",
      "aliases": [
        "CLSA-2026-1788170819"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.0.28-4ubuntu0.18.04.2+tuxcare.els1"
                }
              ]
            }
          ],
          "package": {
            "name": "libsndfile1",
            "purl": "pkg:deb/tuxcare/libsndfile1?distro=ubuntu-18.04",
            "ecosystem": "TuxCare:Ubuntu:18.04"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1788170819.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.0.28-4ubuntu0.18.04.2+tuxcare.els1"
                }
              ]
            }
          ],
          "package": {
            "name": "libsndfile1-dev",
            "purl": "pkg:deb/tuxcare/libsndfile1-dev?distro=ubuntu-18.04",
            "ecosystem": "TuxCare:Ubuntu:18.04"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1788170819.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.0.28-4ubuntu0.18.04.2+tuxcare.els1"
                }
              ]
            }
          ],
          "package": {
            "name": "sndfile-programs",
            "purl": "pkg:deb/tuxcare/sndfile-programs?distro=ubuntu-18.04",
            "ecosystem": "TuxCare:Ubuntu:18.04"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1788170819.json"
          }
        }
      ],
      "modified": "2026-10-26T09:32:04.278067553Z",
      "provider": "osv",
      "upstream": [
        "CVE-2021-4156",
        "CVE-2022-33065",
        "CVE-2025-52194"
      ],
      "references": [
        "https://errata.tuxcare.com/els_os/ubuntu18.04els/CLSA-2026-1788170819.html",
        "https://nvd.nist.gov/vuln/detail/CVE-2021-4156",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-33065",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-52194"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2021-4156",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2022-33065",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2025-52194",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 449592,
  "published_at": "2026-08-31T10:07:11+00:00"
}