{
  "cveId": "CVE-2024-2511",
  "url": "https://patchblox.com/security/cve/CVE-2024-2511",
  "summary": "CVE-2024-2511 is fixed in 25 products on 1 platform, first by DEBIAN-CVE-2024-2511, released April 8, 2024. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "libssl1.1: Issue summary: Some non-default TLS server configurations can cause unbounded memory growth when processing TLSv1.3 s...",
  "description": "Issue summary: Some non-default TLS server configurations can cause unbounded memory growth when processing TLSv1.3 sessions Impact summary: An attacker may exploit certain server configurations to trigger unbounded memory growth that would lead to a Denial of Service This problem can occur in TLSv1.3 if the non-default SSL_OP_NO_TICKET option is being used (but not if early_data support is also configured and the default anti-replay protection is in use). In this case, under certain conditions, the session cache can get into an incorrect state and it will fail to flush properly as it fills. The session cache will continue to grow in an unbounded manner. A malicious client could deliberately create the scenario for this failure to force a Denial of Service. It may also happen by accident in normal operation. This issue only affects TLS servers supporting TLSv1.3. It does not affect TLS clients. The FIPS modules in 3.2, 3.1 and 3.0 are not affected by this issue. OpenSSL 1.0.2 is also not affected by this issue.",
  "published": "2024-04-08T07:15:00Z",
  "severity": "Low",
  "cvss": 5.9,
  "cvssVector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.59302,
  "epssPercentile": 0.99125,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "efi-shell-aa64",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "2024.02-2ubuntu0.6",
      "fix": "efi-shell-aa64 2024.02-2ubuntu0.6",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-efi-shell-aa64-2024.02-2ubuntu0.6",
      "released": "2025-08-12T08:15:00Z"
    },
    {
      "platform": "linux",
      "product": "efi-shell-arm",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "2024.02-2ubuntu0.6",
      "fix": "efi-shell-arm 2024.02-2ubuntu0.6",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-efi-shell-arm-2024.02-2ubuntu0.6",
      "released": "2025-08-12T08:15:00Z"
    },
    {
      "platform": "linux",
      "product": "efi-shell-ia32",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "2024.02-2ubuntu0.6",
      "fix": "efi-shell-ia32 2024.02-2ubuntu0.6",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-efi-shell-ia32-2024.02-2ubuntu0.6",
      "released": "2025-08-12T08:15:00Z"
    },
    {
      "platform": "linux",
      "product": "efi-shell-riscv64",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "2024.02-2ubuntu0.6",
      "fix": "efi-shell-riscv64 2024.02-2ubuntu0.6",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-efi-shell-riscv64-2024.02-2ubuntu0.6",
      "released": "2025-08-12T08:15:00Z"
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      "product": "efi-shell-x64",
      "release": "Ubuntu 24.04.5 LTS (noble)",
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      "fix": "efi-shell-x64 2024.02-2ubuntu0.6",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-efi-shell-x64-2024.02-2ubuntu0.6",
      "released": "2025-08-12T08:15:00Z"
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    {
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      "product": "libssl1.1",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libssl1.1-1.1.1-1ubuntu2.1-18.04.23-esm10",
      "released": "2026-08-27T00:27:07Z"
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    {
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      "product": "libssl1.1",
      "release": "Ubuntu 20.04 LTS (focal)",
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libssl3t64-3.0.13-0ubuntu3.2",
      "released": "2024-06-27T04:15:00Z"
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      "product": "libssl3t64",
      "release": "Ubuntu 24.10 (oracular)",
      "fixedVersion": "3.2.2-1ubuntu1",
      "fix": "libssl3t64 3.2.2-1ubuntu1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-oracular-libssl3t64-3.2.2-1ubuntu1",
      "released": "2024-05-28T00:00:00Z"
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      "product": "libssl3t64",
      "release": "Ubuntu 25.04 (plucky)",
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      "released": "2024-05-28T00:00:00Z"
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    {
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      "product": "openssl",
      "release": "Debian 12.15 (bookworm)",
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      "url": "https://patchblox.com/security/fix/linux/debian-cve-2024-2511",
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      "release": "Debian 13.5 (trixie)",
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      "release": "Debian 14",
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      "release": "Ubuntu 20.04 LTS (focal)",
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-qemu-efi-arm-2022.02-3ubuntu0.22.04.4",
      "released": "2025-08-12T08:15:00Z"
    },
    {
      "platform": "linux",
      "product": "qemu-efi-arm",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "2024.02-2ubuntu0.6",
      "fix": "qemu-efi-arm 2024.02-2ubuntu0.6",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-qemu-efi-arm-2024.02-2ubuntu0.6",
      "released": "2025-08-12T08:15:00Z"
    },
    {
      "platform": "linux",
      "product": "qemu-efi-riscv64",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "2024.02-2ubuntu0.6",
      "fix": "qemu-efi-riscv64 2024.02-2ubuntu0.6",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-qemu-efi-riscv64-2024.02-2ubuntu0.6",
      "released": "2025-08-12T08:15:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}