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    CVE-2026-127030

    A flaw was found in freeradius. An improper length validation in the EAP-FAST module allows a stack-based buffer overflow during session ticket processing. A remote, unauthenticated attacker can exploit this flaw by sending a specially crafted handshake request, causing the server process to crash and resulting in a Denial of Service (DoS).

    Published:Nov 12, 2026
    Last Modified:Nov 13, 2026
    EPS:Nov 12, 2026
    EPSS Score:
    CVSS Score:7.5

    Affected Products

    Vendor
    Freeradius
    Product
    Freeradius
    Vendor
    Red Hat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Rhel Els

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-787 Out-of-bounds Write

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-127029 (CVSS 7.5) — A flaw was found in freeradius's Extensible Authentication Protocol Method for Subscriber Identity Module (EAP…
    CVE-2024-3596 (CVSS 9) — RADIUS Protocol under RFC 2865 is susceptible to forgery attacks by a local attacker who can modify any valid …
    CVE-2022-41861 (CVSS 6.5) — A flaw was found in freeradius. A malicious RADIUS client or home server can send a malformed abinary attribut…
    CVE-2022-41860 (CVSS 7.5) — In freeradius, when an EAP-SIM supplicant sends an unknown SIM option, the server will try to look that option…
    CVE-2022-41859 (CVSS 7.5) — In freeradius, the EAP-PWD function compute_password_element() leaks information about the password which allo…
    CVE-2019-17185 (CVSS 7.5) — In FreeRADIUS 3.0.x before 3.0.20, the EAP-pwd module used a global OpenSSL BN_CTX instance to handle all hand…
    CVE-2019-13456 (CVSS 6.5) — In FreeRADIUS 3.0 through 3.0.19, on average 1 in every 2048 EAP-pwd handshakes fails because the password ele…
    CVE-2019-10143 (CVSS 7) — It was discovered freeradius up to and including version 3.0.19 does not correctly configure logrotate, allowi…
    CVE-2019-11235 (CVSS 9.8) — FreeRADIUS before 3.0.19 mishandles the "each participant verifies that the received scalar is within a range,…
    CVE-2019-11234 (CVSS 9.8) — FreeRADIUS before 3.0.19 does not prevent use of reflection for authentication spoofing, aka a "Dragonblood" i…

    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