A flaw was found in sssd. When authenticating with a YubiKey, the SSSD PAM responder can crash due to a use-after-free vulnerability, where a memory pointer is incorrectly handled. A local attacker could exploit this flaw by manipulating smartcard or YubiKey contents, leading to a denial of service that disrupts authentication. This vulnerability also presents a potential for privilege escalation, although it is difficult to exploit.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1984 advisory.

    A flaw was found in sssd. When authenticating with a YubiKey, the SSSD PAM responder can crash due to a     use-after-free vulnerability, where a memory pointer is incorrectly handled. A local attacker could     exploit this flaw by manipulating smartcard or YubiKey contents, leading to a denial of service that     disrupts authentication. This vulnerability also presents a potential for privilege escalation, although     it is difficult to exploit. (CVE-2026-12610)

    A flaw was found in SSSD's LDAP sudo provider. When the ldap_sudo_search_base option is not explicitly     configured, SSSD searches the entire LDAP directory tree for sudoRole objects. An authenticated attacker     with write access to any subtree can inject a sudoRole object granting root-level sudo privileges on all     SSSD-enrolled hosts. (CVE-2026-14474)

    A path traversal flaw was found in SSSD's AD GPO provider. The ad_gpo_extract_smb_components() function     does not sanitize .. sequences in the gPCFileSysPath LDAP attribute, allowing an attacker with AD GPO     management access to write files outside the GPO cache directory as root. On default RHEL configurations     with SELinux enforcing, this can be used to inject Kerberos configuration leading to authentication     bypass. (CVE-2026-14476)

    A flaw was found in the System Security Services Daemon (SSSD). The pam_passkey_child_read_data() function     within the PAM passkey responder fails to properly handle raw bytes received from a pipe. Because the data     is treated as a NUL-terminated C string without explicit termination, it results in an out-of-bounds read     when processed by functions like snprintf(). A local attacker could potentially trigger this vulnerability     by initiating a crafted passkey authentication request, causing the SSSD PAM responder to crash, resulting     in a local Denial of Service (DoS). (CVE-2026-6245)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-5acfb0243b advisory.

    CVE fixes: CVE-2026-12610 CVE-2026-14474 CVE-2026-14476
    - rhbz#2494777: CVE-2026-12610 sssd: Use-after-free crash in SSSD' 'sssd_pam' process
    - rhbz#2497650: CVE-2026-14476 sssd: sssd: GPO cache path traversal via unsanitized     gPCFileSysPath allows Kerberos authentication bypass
    - rhbz#2497651: CVE-2026-14474 sssd: sssd: sudo LDAP provider searches entire directory     tree for sudoRole objects by default, enabling privilege escalation

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 45 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-8fad0036a5 advisory.

    Automatic update for sssd-2.13.1-3.fc45.

    ##### **Changelog**

    ```
    * Wed Jul  8 2026 Sumit Bose <sbose@redhat.com> - 2.13.1-3
    - CVE fixes: CVE-2026-12610 CVE-2026-14474 CVE-2026-14476
    - rhbz#2494777: CVE-2026-12610 sssd: Use-after-free crash in SSSD'       'sssd_pam' process
    - rhbz#2497650: CVE-2026-14476 sssd: sssd: GPO cache path traversal via       unsanitized gPCFileSysPath allows Kerberos authentication bypass
    - rhbz#2497651: CVE-2026-14474 sssd: sssd: sudo LDAP provider searches       entire directory tree for sudoRole objects by default, enabling privilege       escalation

    ```

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - A flaw was found in sssd. When authenticating with a YubiKey, the SSSD PAM responder can crash due to a     use-after-free vulnerability, where a memory pointer is incorrectly handled. A local attacker could     exploit this flaw by manipulating smartcard or YubiKey contents, leading to a denial of service that     disrupts authentication. This vulnerability also presents a potential for privilege escalation, although     it is difficult to exploit. (CVE-2026-12610)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
328460	Amazon Linux 2023 : libipa_hbac, libipa_hbac-devel, libsss_autofs (ALAS2023-2026-1984)	Nessus	Amazon Linux Local Security Checks	high
326359	Fedora 44 : sssd (2026-5acfb0243b)	Nessus	Fedora Local Security Checks	high
326286	Fedora 45 : sssd (2026-8fad0036a5)	Nessus	Fedora Local Security Checks	high
324379	Linux Distros Unpatched Vulnerability : CVE-2026-12610	Nessus	Misc.	medium

Detections

Analytics

CVE-2026-12610

medium

Tenable Plugins

high

high

high

medium