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    CVE-2024-23744

    An issue was discovered in Mbed TLS 3.5.1. There is persistent handshake denial if a client sends a TLS 1.3 ClientHello without extensions.

    Published:Jan 21, 2024
    Last Modified:Jun 5, 2026
    EPS:Jan 21, 2024
    EPSS Score:0.00049
    CVSS Score:7.5

    Affected Products

    Vendor
    Trustedfirmware
    Product
    Mbed Tls

    Exploits

    https://github.com/Mbed-TLS/mbedtls/issues/8694https://github.com/Mbed-TLS/mbedtls/issues/8694

    Related CVEs

    CVE-2026-34876 (CVSS 7.5) — An issue was discovered in Mbed TLS 3.x before 3.6.6. An out-of-bounds read vulnerability in mbedtls_ccm_finis…
    CVE-2026-34877 (CVSS 9.8) — An issue was discovered in Mbed TLS versions from 2.19.0 up to 3.6.5, Mbed TLS 4.0.0. Insufficient protection …
    CVE-2026-34873 (CVSS 9.1) — An issue was discovered in Mbed TLS 3.5.0 through 4.0.0. Client impersonation can occur while resuming a TLS 1…
    CVE-2026-34874 (CVSS 7.5) — An issue was discovered in Mbed TLS through 3.6.5 and 4.x through 4.0.0. There is a NULL pointer dereference i…
    CVE-2026-34875 (CVSS 9.8) — An issue was discovered in Mbed TLS through 3.6.5 and TF-PSA-Crypto 1.0.0. A buffer overflow can occur in publ…
    CVE-2026-25834 (CVSS 6.5) — Mbed TLS v3.3.0 up to 3.6.5 and 4.0.0 allows Algorithm Downgrade.…
    CVE-2026-25833 (CVSS 7.5) — Mbed TLS 3.5.0 to 3.6.5 fixed in 3.6.6 and 4.1.0 has a buffer overflow in the x509_inet_pton_ipv6() function…
    CVE-2026-25835 (CVSS 7.7) — Mbed TLS before 3.6.6 and TF-PSA-Crypto before 1.1.0 misuse seeds in a Pseudo-Random Number Generator (PRNG).…
    CVE-2025-49087 (CVSS 4) — In Mbed TLS 3.6.1 through 3.6.3 before 3.6.4, a timing discrepancy in block cipher padding removal allows an a…
    CVE-2025-49601 (CVSS 4.8) — In MbedTLS 3.3.0 before 3.6.4, mbedtls_lms_import_public_key does not check that the input buffer is at least …

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High