CVE catalog

CVE-2024-28836

mbedtls affected and fixed versions

[CVE catalog]

An issue was discovered in Mbed TLS 3.5.x before 3.6.0. When negotiating the TLS version on the server side, it can fall back to the TLS 1.2 implementation of the protocol if it is disabled. If the TLS 1.2 implementation was disabled at build time, a TLS 1.2 client could put a TLS 1.3-only server into an infinite loop processing a TLS 1.2 ClientHello, resulting in a denial of service. If the TLS 1.2 implementation was disabled at runtime, a TLS 1.2 client can successfully establish a TLS 1.2 connection with the server.

Severity
Medium · CVSS 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Published
Source
[NVD] · [CVE record]
EPSS
0.41% · Oct 27, 2026

Projects and upstream resources

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Version impact has not been established. The original provider fields are retained below.

Provider details and historical evidence
Original provider fields
{
  "package_releases": [
    {
      "name": "mbedtls",
      "status": "not affected",
      "release": "sid",
      "version": "3.6.7-3"
    },
    {
      "name": "mbedtls",
      "status": "not affected",
      "release": "forky",
      "version": "3.6.7-3"
    },
    {
      "name": "mbedtls",
      "status": "not affected",
      "release": "trixie",
      "version": "3.6.6-0.1~deb13u1"
    },
    {
      "name": "mbedtls",
      "status": "not affected",
      "release": "bookworm",
      "version": "2.28.3-1"
    }
  ],
  "fixed_versions": [
    {
      "bug": null,
      "name": "mbedtls",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "unimportant",
      "fixed_version": "0"
    },
    {
      "bug": null,
      "name": "mbedtls",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "unimportant",
      "fixed_version": "0"
    },
    {
      "bug": null,
      "name": "mbedtls",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "unimportant",
      "fixed_version": "0"
    },
    {
      "bug": null,
      "name": "mbedtls",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "unimportant",
      "fixed_version": "0"
    }
  ],
  "distribution_packages": []
}

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

  • [libmbedcrypto7]Unknown

    Source package: [mbedtls]

    Details (2)

    • 2.28.3-1 · amd64 · bookworm

      Not affected

      dsa · mbedtls · debian · bookworm

    • 2.28.3-1 · arm64 · bookworm

      Not affected

      dsa · mbedtls · debian · bookworm

  • [libmbedtls14]Unknown

    Source package: [mbedtls]

    Details (2)

    • 2.28.3-1 · amd64 · bookworm

      Not affected

      dsa · mbedtls · debian · bookworm

    • 2.28.3-1 · arm64 · bookworm

      Not affected

      dsa · mbedtls · debian · bookworm

  • [libmbedtls-dev]Unknown

    Source package: [mbedtls]

    Details (2)

    • 2.28.3-1 · amd64 · bookworm

      Not affected

      dsa · mbedtls · debian · bookworm

    • 2.28.3-1 · arm64 · bookworm

      Not affected

      dsa · mbedtls · debian · bookworm

  • [libmbedtls-doc]Unknown

    Source package: [mbedtls]

    Details (2)

    • 2.28.3-1 · all · bookworm

      Not affected

      dsa · mbedtls · debian · bookworm

    • 2.28.3-1 · all · bookworm

      Not affected

      dsa · mbedtls · debian · bookworm

  • [libmbedx509-1]Unknown

    Source package: [mbedtls]

    Details (2)

    • 2.28.3-1 · amd64 · bookworm

      Not affected

      dsa · mbedtls · debian · bookworm

    • 2.28.3-1 · arm64 · bookworm

      Not affected

      dsa · mbedtls · debian · bookworm

Observed:

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]