{
  "cveId": "CVE-2021-0561",
  "url": "https://patchblox.com/security/cve/CVE-2021-0561",
  "summary": "CVE-2021-0561 is fixed in 8 products on 1 platform, first by flac 1.3.2-1ubuntu0.1, released June 22, 2021. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "flac: FLAC stands for Free Lossless Audio Codec",
  "description": "FLAC stands for Free Lossless Audio Codec. FLAC is similar to Ogg Vorbis, but lossless. The FLAC project consists of the stream format, reference encoders and decoders in library form, a command-line program to encode and decode FLAC files, and a command-line metadata editor for FLAC files.\n\nSecurity Fix(es):\n\n* flac: out of bound write in append_to_verify_fifo_interleaved_ of stream_encoder.c (CVE-2021-0561)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n\nAdditional Changes:\n\nFor detailed information on changes in this release, see the Red Hat Enterprise Linux 9.1 Release Notes linked from the References section.",
  "published": "2021-06-22T04:15:00Z",
  "severity": "Moderate",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
  "epss": 0.00465,
  "epssPercentile": 0.40497,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "flac",
      "release": "RHEL 9",
      "fixedVersion": "0:1.3.3-10.el9",
      "fix": "RHSA-2022:8078",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2022-8078",
      "released": "2022-11-15T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "flac",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.3.2-1ubuntu0.1",
      "fix": "flac 1.3.2-1ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-flac-1.3.2-1ubuntu0.1",
      "released": "2021-06-22T04:15:00Z"
    },
    {
      "platform": "linux",
      "product": "flac",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1.3.3-1ubuntu0.1",
      "fix": "flac 1.3.3-1ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-flac-1.3.3-1ubuntu0.1",
      "released": "2021-06-22T04:15:00Z"
    },
    {
      "platform": "linux",
      "product": "flac",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1.3.3-2ubuntu0.1",
      "fix": "flac 1.3.3-2ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-flac-1.3.3-2ubuntu0.1",
      "released": "2021-06-22T04:15:00Z"
    },
    {
      "platform": "linux",
      "product": "flac",
      "release": "almalinux 9",
      "fixedVersion": "1.3.3-10.el9",
      "fix": "ALSA-2022:8078",
      "url": "https://patchblox.com/security/fix/linux/alsa-2022-8078",
      "released": "2022-11-15T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "flac",
      "release": "amzn 2023",
      "fixedVersion": "1.3.4-1.amzn2023.0.2",
      "fix": "ALAS2023-2023-008",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-008",
      "released": "2023-02-17T20:42:00Z"
    },
    {
      "platform": "linux",
      "product": "flac",
      "release": "ol 9",
      "fixedVersion": "0:1.3.3-10.el9",
      "fix": "ELSA-2022-8078",
      "url": "https://patchblox.com/security/fix/linux/elsa-2022-8078",
      "released": "2022-11-22T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "flac",
      "release": "rocky 9",
      "fixedVersion": "0:1.3.3-10.el9",
      "fix": "RLSA-2022:8078",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2022-8078",
      "released": "2022-11-15T06:15:08Z"
    },
    {
      "platform": "linux",
      "product": "flac-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1.3.4-1.amzn2023.0.2",
      "fix": "ALAS2023-2023-008",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-008",
      "released": "2023-02-17T20:42:00Z"
    },
    {
      "platform": "linux",
      "product": "flac-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "1.3.4-1.amzn2023.0.2",
      "fix": "ALAS2023-2023-008",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-008",
      "released": "2023-02-17T20:42:00Z"
    },
    {
      "platform": "linux",
      "product": "flac-devel",
      "release": "RHEL 9",
      "fixedVersion": "0:1.3.3-10.el9",
      "fix": "RHSA-2022:8078",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2022-8078",
      "released": "2022-11-15T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "flac-devel",
      "release": "almalinux 9",
      "fixedVersion": "1.3.3-10.el9",
      "fix": "ALSA-2022:8078",
      "url": "https://patchblox.com/security/fix/linux/alsa-2022-8078",
      "released": "2022-11-15T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "flac-devel",
      "release": "amzn 2023",
      "fixedVersion": "1.3.4-1.amzn2023.0.2",
      "fix": "ALAS2023-2023-008",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-008",
      "released": "2023-02-17T20:42:00Z"
    },
    {
      "platform": "linux",
      "product": "flac-devel",
      "release": "ol 9",
      "fixedVersion": "0:1.3.3-10.el9",
      "fix": "ELSA-2022-8078",
      "url": "https://patchblox.com/security/fix/linux/elsa-2022-8078",
      "released": "2022-11-22T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "flac-libs",
      "release": "RHEL 9",
      "fixedVersion": "0:1.3.3-10.el9",
      "fix": "RHSA-2022:8078",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2022-8078",
      "released": "2022-11-15T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "flac-libs",
      "release": "almalinux 9",
      "fixedVersion": "1.3.3-10.el9",
      "fix": "ALSA-2022:8078",
      "url": "https://patchblox.com/security/fix/linux/alsa-2022-8078",
      "released": "2022-11-15T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "flac-libs",
      "release": "amzn 2023",
      "fixedVersion": "1.3.4-1.amzn2023.0.2",
      "fix": "ALAS2023-2023-008",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-008",
      "released": "2023-02-17T20:42:00Z"
    },
    {
      "platform": "linux",
      "product": "flac-libs",
      "release": "ol 9",
      "fixedVersion": "0:1.3.3-10.el9",
      "fix": "ELSA-2022-8078",
      "url": "https://patchblox.com/security/fix/linux/elsa-2022-8078",
      "released": "2022-11-22T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "flac-libs-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1.3.4-1.amzn2023.0.2",
      "fix": "ALAS2023-2023-008",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-008",
      "released": "2023-02-17T20:42:00Z"
    },
    {
      "platform": "linux",
      "product": "libflac\u002B\u002B6v5",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.3.2-1ubuntu0.1",
      "fix": "libflac\u002B\u002B6v5 1.3.2-1ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libflac-6v5-1.3.2-1ubuntu0.1",
      "released": "2021-06-22T04:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libflac\u002B\u002B6v5",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1.3.3-1ubuntu0.1",
      "fix": "libflac\u002B\u002B6v5 1.3.3-1ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libflac-6v5-1.3.3-1ubuntu0.1",
      "released": "2021-06-22T04:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libflac\u002B\u002B6v5",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1.3.3-2ubuntu0.1",
      "fix": "libflac\u002B\u002B6v5 1.3.3-2ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libflac-6v5-1.3.3-2ubuntu0.1",
      "released": "2021-06-22T04:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libflac8",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.3.2-1ubuntu0.1",
      "fix": "libflac8 1.3.2-1ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libflac8-1.3.2-1ubuntu0.1",
      "released": "2021-06-22T04:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libflac8",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1.3.3-1ubuntu0.1",
      "fix": "libflac8 1.3.3-1ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libflac8-1.3.3-1ubuntu0.1",
      "released": "2021-06-22T04:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libflac8",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1.3.3-2ubuntu0.1",
      "fix": "libflac8 1.3.3-2ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libflac8-1.3.3-2ubuntu0.1",
      "released": "2021-06-22T04:15:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}