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    CVE-2026-68743

    A flaw was found in SSSD. The extract_authtok_v1() function in the PAM responder does not validate the auth_token_length field against the remaining buffer size before processing. A local attacker can exploit this via a crafted protocol v1 request to the PAM responder socket, causing an out-of-bounds read and process crash, resulting in a denial of service.

    Published:Aug 3, 2026
    Last Modified:Aug 17, 2026
    EPS:Aug 4, 2026
    EPSS Score:0.00136
    CVSS Score:5.5

    Affected Products

    Vendor
    Fedoraproject
    Product
    Sssd
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Openshift
    Vendor
    Redhat
    Product
    Openshift Container Platform
    Vendor
    Sssd
    Product
    Sssd

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-125 Out-of-bounds Read

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-540 Overread Buffers

    Related CVEs

    CVE-2026-68744 (CVSS 3.3) — A flaw was found in SSSD. The sss_nss_protocol_fill_initgr() function in the NSS responder pre-allocates reply…
    CVE-2026-68742 (CVSS 5.5) — A flaw was found in SSSD. The sss_nss_protocol_parse_addr() function in the NSS responder does not validate th…
    CVE-2026-6245 (CVSS 5.5) — A flaw was found in the System Security Services Daemon (SSSD). The pam_passkey_child_read_data() function wit…
    CVE-2023-3758 (CVSS 7.1) — A race condition flaw was found in sssd where the GPO policy is not consistently applied for authenticated use…
    CVE-2022-4254 (CVSS 8.8) — sssd: libsss_certmap fails to sanitise certificate data used in LDAP filters…
    CVE-2021-3621 (CVSS 8.8) — A flaw was found in SSSD, where the sssctl command was vulnerable to shell command injection via the logs-fetc…
    CVE-2012-3462 (CVSS 8.8) — A flaw was found in SSSD version 1.9.0. The SSSD's access-provider logic causes the result of the HBAC rule pr…
    CVE-2018-16838 (CVSS 5.4) — A flaw was found in sssd Group Policy Objects implementation. When the GPO is not readable by SSSD due to a to…
    CVE-2018-16883 (CVSS 2.5) — sssd versions from 1.13.0 to before 2.0.0 did not properly restrict access to the infopipe according to the "a…
    CVE-2019-3811 (CVSS 5.2) — A vulnerability was found in sssd. If a user was configured with no home directory set, sssd would return '/' …

    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