{
  "cveId": "CVE-2023-6862",
  "url": "https://patchblox.com/security/cve/CVE-2023-6862",
  "summary": "CVE-2023-6862 is fixed in 10 products on 2 platforms, first by DEBIAN-CVE-2023-6862, released December 19, 2023. It is not reported as exploited. Patch Radar priority: High.",
  "title": "Mozilla Thunderbird and 1 other: A use-after-free was identified in the \u0060nsDNSService::Init\u0060.",
  "description": "A use-after-free was identified in the \u0060nsDNSService::Init\u0060.  This issue appears to manifest rarely during start-up. This vulnerability affects Firefox ESR \u003C 115.6 and Thunderbird \u003C 115.6.",
  "published": "2023-12-19T14:15:07Z",
  "severity": "high",
  "cvss": 8.8,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
  "epss": 0.00951,
  "epssPercentile": 0.61508,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://nvd.nist.gov/vuln/detail/CVE-2023-6862",
  "fixes": [
    {
      "platform": "windows-app",
      "product": "Mozilla Thunderbird (en-US)",
      "fixedVersion": "115.8.0",
      "fix": "Mozilla Thunderbird (en-US) 115.8.0",
      "url": "https://patchblox.com/security/fix/windows-app/mozilla.thunderbird-115.8.0",
      "released": "2024-02-21T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox",
      "release": "RHEL 8",
      "fixedVersion": "0:115.6.0-1.el8_9",
      "fix": "RHSA-2024:0012",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2024-0012",
      "released": "2024-01-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox",
      "release": "RHEL 9",
      "fixedVersion": "0:115.6.0-1.el9_3",
      "fix": "RHSA-2024:0025",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2024-0025",
      "released": "2024-01-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox",
      "release": "almalinux 8",
      "fixedVersion": "115.6.0-1.el8_9.alma",
      "fix": "ALSA-2024:0012",
      "url": "https://patchblox.com/security/fix/linux/alsa-2024-0012",
      "released": "2024-01-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox",
      "release": "almalinux 9",
      "fixedVersion": "115.6.0-1.el9_3.alma",
      "fix": "ALSA-2024:0025",
      "url": "https://patchblox.com/security/fix/linux/alsa-2024-0025",
      "released": "2024-01-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox",
      "release": "ol 8",
      "fixedVersion": "0:115.6.0-1.0.1.el8_9",
      "fix": "ELSA-2024-0012",
      "url": "https://patchblox.com/security/fix/linux/elsa-2024-0012",
      "released": "2024-01-03T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox",
      "release": "ol 9",
      "fixedVersion": "0:115.6.0-1.0.1.el9_3",
      "fix": "ELSA-2024-0025",
      "url": "https://patchblox.com/security/fix/linux/elsa-2024-0025",
      "released": "2024-01-03T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox",
      "release": "rocky 8",
      "fixedVersion": "0:115.6.0-1.el8_9",
      "fix": "RLSA-2024:0012",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2024-0012",
      "released": "2024-01-09T04:07:41Z"
    },
    {
      "platform": "linux",
      "product": "firefox-esr",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "115.6.0esr-1~deb12u1",
      "fix": "DEBIAN-CVE-2023-6862",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-6862",
      "released": "2023-12-19T14:15:07Z"
    },
    {
      "platform": "linux",
      "product": "firefox-esr",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "115.6.0esr-1",
      "fix": "DEBIAN-CVE-2023-6862",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-6862",
      "released": "2023-12-19T14:15:07Z"
    },
    {
      "platform": "linux",
      "product": "firefox-esr",
      "release": "Debian 14",
      "fixedVersion": "115.6.0esr-1",
      "fix": "DEBIAN-CVE-2023-6862",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-6862",
      "released": "2023-12-19T14:15:07Z"
    },
    {
      "platform": "linux",
      "product": "firefox-x11",
      "release": "RHEL 9",
      "fixedVersion": "0:115.6.0-1.el9_3",
      "fix": "RHSA-2024:0025",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2024-0025",
      "released": "2024-01-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox-x11",
      "release": "almalinux 9",
      "fixedVersion": "115.6.0-1.el9_3.alma",
      "fix": "ALSA-2024:0025",
      "url": "https://patchblox.com/security/fix/linux/alsa-2024-0025",
      "released": "2024-01-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox-x11",
      "release": "ol 9",
      "fixedVersion": "0:115.6.0-1.0.1.el9_3",
      "fix": "ELSA-2024-0025",
      "url": "https://patchblox.com/security/fix/linux/elsa-2024-0025",
      "released": "2024-01-03T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "1:115.6.0-1~deb12u1",
      "fix": "DEBIAN-CVE-2023-6862",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-6862",
      "released": "2023-12-19T14:15:07Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "1:115.6.0-1",
      "fix": "DEBIAN-CVE-2023-6862",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-6862",
      "released": "2023-12-19T14:15:07Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird",
      "release": "Debian 14",
      "fixedVersion": "1:115.6.0-1",
      "fix": "DEBIAN-CVE-2023-6862",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-6862",
      "released": "2023-12-19T14:15:07Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird",
      "release": "RHEL 8",
      "fixedVersion": "0:115.6.0-1.el8_9",
      "fix": "RHSA-2024:0003",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2024-0003",
      "released": "2024-01-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird",
      "release": "RHEL 9",
      "fixedVersion": "0:115.6.0-1.el9_3",
      "fix": "RHSA-2024:0001",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2024-0001",
      "released": "2024-01-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1:115.6.0\u002Bbuild2-0ubuntu0.20.04.1",
      "fix": "thunderbird 1:115.6.0\u002Bbuild2-0ubuntu0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-thunderbird-1-115.6.0-build2-0ubuntu0.20.04.1",
      "released": "2023-12-19T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1:115.6.0\u002Bbuild2-0ubuntu0.22.04.1",
      "fix": "thunderbird 1:115.6.0\u002Bbuild2-0ubuntu0.22.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-thunderbird-1-115.6.0-build2-0ubuntu0.22.04.1",
      "released": "2023-12-19T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "1:115.6.0\u002Bbuild2-0ubuntu1",
      "fix": "thunderbird 1:115.6.0\u002Bbuild2-0ubuntu1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-thunderbird-1-115.6.0-build2-0ubuntu1",
      "released": "2023-12-19T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird",
      "release": "almalinux 8",
      "fixedVersion": "115.6.0-1.el8_9.alma",
      "fix": "ALSA-2024:0003",
      "url": "https://patchblox.com/security/fix/linux/alsa-2024-0003",
      "released": "2024-01-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird",
      "release": "almalinux 9",
      "fixedVersion": "115.6.0-1.el9_3.alma",
      "fix": "ALSA-2024:0001",
      "url": "https://patchblox.com/security/fix/linux/alsa-2024-0001",
      "released": "2024-01-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird",
      "release": "ol 8",
      "fixedVersion": "0:115.6.0-1.0.1.el8_9",
      "fix": "ELSA-2024-0003",
      "url": "https://patchblox.com/security/fix/linux/elsa-2024-0003",
      "released": "2024-01-03T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird",
      "release": "ol 9",
      "fixedVersion": "0:115.6.0-1.0.1.el9_3",
      "fix": "ELSA-2024-0001",
      "url": "https://patchblox.com/security/fix/linux/elsa-2024-0001",
      "released": "2024-01-03T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird",
      "release": "rocky 8",
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      "fix": "RLSA-2024:0003",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2024-0003",
      "released": "2024-01-09T04:07:41Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird-gnome-support",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1:115.6.0\u002Bbuild2-0ubuntu0.20.04.1",
      "fix": "thunderbird-gnome-support 1:115.6.0\u002Bbuild2-0ubuntu0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-thunderbird-gnome-support-1-115.6.0-build2-0ubuntu0.20.04.1",
      "released": "2023-12-19T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird-gnome-support",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1:115.6.0\u002Bbuild2-0ubuntu0.22.04.1",
      "fix": "thunderbird-gnome-support 1:115.6.0\u002Bbuild2-0ubuntu0.22.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-thunderbird-gnome-support-1-115.6.0-build2-0ubuntu0.22.04.1",
      "released": "2023-12-19T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird-gnome-support",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "1:115.6.0\u002Bbuild2-0ubuntu1",
      "fix": "thunderbird-gnome-support 1:115.6.0\u002Bbuild2-0ubuntu1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-thunderbird-gnome-support-1-115.6.0-build2-0ubuntu1",
      "released": "2023-12-19T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird-mozsymbols",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1:115.6.0\u002Bbuild2-0ubuntu0.20.04.1",
      "fix": "thunderbird-mozsymbols 1:115.6.0\u002Bbuild2-0ubuntu0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-thunderbird-mozsymbols-1-115.6.0-build2-0ubuntu0.20.04.1",
      "released": "2023-12-19T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird-mozsymbols",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1:115.6.0\u002Bbuild2-0ubuntu0.22.04.1",
      "fix": "thunderbird-mozsymbols 1:115.6.0\u002Bbuild2-0ubuntu0.22.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-thunderbird-mozsymbols-1-115.6.0-build2-0ubuntu0.22.04.1",
      "released": "2023-12-19T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird-mozsymbols",
      "release": "Ubuntu 24.04.5 LTS (noble)",
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      "fix": "thunderbird-mozsymbols 1:115.6.0\u002Bbuild2-0ubuntu1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-thunderbird-mozsymbols-1-115.6.0-build2-0ubuntu1",
      "released": "2023-12-19T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "xul-ext-calendar-timezones",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1:115.6.0\u002Bbuild2-0ubuntu0.20.04.1",
      "fix": "xul-ext-calendar-timezones 1:115.6.0\u002Bbuild2-0ubuntu0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-xul-ext-calendar-timezones-1-115.6.0-build2-0ubuntu0.20.04.1",
      "released": "2023-12-19T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "xul-ext-calendar-timezones",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
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      "fix": "xul-ext-calendar-timezones 1:115.6.0\u002Bbuild2-0ubuntu0.22.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-xul-ext-calendar-timezones-1-115.6.0-build2-0ubuntu0.22.04.1",
      "released": "2023-12-19T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "xul-ext-calendar-timezones",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "1:115.6.0\u002Bbuild2-0ubuntu1",
      "fix": "xul-ext-calendar-timezones 1:115.6.0\u002Bbuild2-0ubuntu1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-xul-ext-calendar-timezones-1-115.6.0-build2-0ubuntu1",
      "released": "2023-12-19T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "xul-ext-gdata-provider",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1:115.6.0\u002Bbuild2-0ubuntu0.20.04.1",
      "fix": "xul-ext-gdata-provider 1:115.6.0\u002Bbuild2-0ubuntu0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-xul-ext-gdata-provider-1-115.6.0-build2-0ubuntu0.20.04.1",
      "released": "2023-12-19T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "xul-ext-gdata-provider",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1:115.6.0\u002Bbuild2-0ubuntu0.22.04.1",
      "fix": "xul-ext-gdata-provider 1:115.6.0\u002Bbuild2-0ubuntu0.22.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-xul-ext-gdata-provider-1-115.6.0-build2-0ubuntu0.22.04.1",
      "released": "2023-12-19T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "xul-ext-gdata-provider",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "1:115.6.0\u002Bbuild2-0ubuntu1",
      "fix": "xul-ext-gdata-provider 1:115.6.0\u002Bbuild2-0ubuntu1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-xul-ext-gdata-provider-1-115.6.0-build2-0ubuntu1",
      "released": "2023-12-19T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "xul-ext-lightning",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1:115.6.0\u002Bbuild2-0ubuntu0.20.04.1",
      "fix": "xul-ext-lightning 1:115.6.0\u002Bbuild2-0ubuntu0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-xul-ext-lightning-1-115.6.0-build2-0ubuntu0.20.04.1",
      "released": "2023-12-19T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "xul-ext-lightning",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1:115.6.0\u002Bbuild2-0ubuntu0.22.04.1",
      "fix": "xul-ext-lightning 1:115.6.0\u002Bbuild2-0ubuntu0.22.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-xul-ext-lightning-1-115.6.0-build2-0ubuntu0.22.04.1",
      "released": "2023-12-19T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "xul-ext-lightning",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "1:115.6.0\u002Bbuild2-0ubuntu1",
      "fix": "xul-ext-lightning 1:115.6.0\u002Bbuild2-0ubuntu1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-xul-ext-lightning-1-115.6.0-build2-0ubuntu1",
      "released": "2023-12-19T16:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}