CVE-2026-104047: Improper Neutralization of Delimiters

A flaw was found in SSSD. When configured to use Microsoft Entra ID, search inputs are not properly sanitized before being incorporated into directory query filters. A local user can exploit this vulnerability by submitting a crafted lookup request, manipulating the query logic to cause...

CVE-2026-104048: Comparison Using Wrong Factors

A flaw was found in SSSD. In trust-enabled identity management environments, SSSD evaluates Host-Based Access Control HBAC rules by stripping domain qualifiers and comparing only short usernames. An authenticated user in a trusted domain who shares the same username as an authorized local account...

CVE-2026-104046: Allocation of Resources Without Limits or Throttling

A flaw was found in SSSD System Security Services Daemon. When Identity Provider IdP authentication is enabled, pre-authentication requests retain state in memory without being cleared or timed out. A local attacker can repeatedly initiate authentication flows without completing them, causing...

CVE-2026-104045: Missing Release of Resource after Effective Lifetime

A flaw was found in SSSD. A local user can trigger a Denial of Service DoS by exploiting a race condition in the autofs responder between asynchronous enumeration completion and map invalidation. By repeatedly sending concurrent map enumeration and invalidation requests, an attacker can cause...

CVE-2026-88252: Loop with Unreachable Exit Condition

A flaw was found in sssd. A local user can cause a Denial of Service DoS by exhausting the responder service's available file descriptors system handles used for open connections. By opening and maintaining many concurrent connections to a responder socket while continuing to queue new connection...

CVE-2026-104044: NULL Pointer Dereference

A flaw was found in sssd. A local attacker can trigger a Denial of Service DoS by sending a specially crafted Pluggable Authentication Module PAM request when passkey authentication is enabled. Due to a missing state validation check in passkey Kerberos handling, the PAM responder dereferences an...

CVE-2026-104042: Out-of-bounds Read

A flaw was found in sssd. A local attacker can cause a Denial of Service DoS by sending a crafted Pluggable Authentication Module PAM request containing a zero-length authentication token to the responder socket. Due to missing input validation, the service attempts to read beyond buffer boundari...

CVE-2026-92821: Return of Wrong Status Code

A flaw was found in SSSD. When configured to evaluate password expiration warnings before restrictive access rules in LDAP Lightweight Directory Access Protocol environments, an expired-password warning terminates rule evaluation early and treats the access request as successful. A remote...

CVE-2026-104035: Missing Release of Resource after Effective Lifetime

A flaw was found in SSSD. An issue in the Kerberos Credential Manager KCM responder allows a local user to cause a Denial of Service DoS by maintaining a persistent connection and repeatedly storing and destroying credentials. Because the service fails to release cached objects from memory when...

CVE-2026-104034: Expired Pointer Dereference

A flaw was found in SSSD. A use-after-free vulnerability exists in the Kerberos Credential Manager KCM responder during Kerberos ticket-granting ticket TGT renewal, where a deferred callback accesses memory that has already been released. An authenticated local user with a renewable Kerberos tick...

CVE-2026-104033: Off-by-one Error

A flaw was found in SSSD. When configured to enforce account expiration using LDAP Lightweight Directory Access Protocol shadow attributes, SSSD fails to treat an expiration value of zero as an expired account. A user with valid credentials for an expired account can exploit this flaw to bypass...

CVE-2026-104032: Incorrect Behavior Order: Early Amplification

A flaw was found in SSSD. An unprivileged local user can repeatedly request master automount map updates through the autofs responder due to missing authorization checks. This triggers global cache invalidation and forces repeated lookups to backend directory providers, leading to a Denial of...

CVE-2026-104031: Missing Release of Resource after Effective Lifetime

A flaw was found in SSSD. In configurations where the autofs responder service is enabled, memory allocated during successful request processing is not released until the client connection terminates. A local attacker can exploit this vulnerability by maintaining an open connection and repeatedly...

CVE-2026-104043: Out-of-bounds Read

A flaw was found in SSSD. A local attacker with access to the Name Service Switch NSS responder UNIX socket can trigger an integer underflow by sending a specially crafted request with an undersized packet header. This issue causes an out-of-bounds memory read during packet parsing, crashing the...

CVE-2026-104040: Improper Neutralization of Delimiters

A flaw was found in SSSD. When configured with the Entra ID identity provider, input lookup names containing single quotes are not properly escaped before being included in Microsoft Graph Open Data Protocol OData queries. A low-privileged local user can exploit this flaw by submitting a crafted...

CVE-2026-104039: Expired Pointer Dereference

A flaw was found in SSSD. A local user can cause a denial of service DoS by disrupting system authentication services. When handling Generic Security Services Application Programming Interface GSSAPI authentication in the Pluggable Authentication Module PAM responder, cached connection state is...

CVE-2026-104037: Out-of-bounds Read

A flaw was found in SSSD. A local attacker can exploit this issue by sending a specially crafted request with an invalid packet length to the autofs responder UNIX socket. This causes an integer underflow and an out-of-bounds memory read, which can crash the responder process and result in a deni...

CVE-2026-104036: Out-of-bounds Write

A flaw was found in SSSD's NFS idmap plugin. When retrieving cached user or group names, the plugin detects if an entry exceeds the destination buffer size but fails to abort before copying data. A local attacker can trigger this vulnerability by requesting identity lookups that resolve to...

PT-2026-106835

A flaw was found in sssd. A local user can cause a Denial of Service DoS by exhausting the responder service's available file descriptors system handles used for open connections. By opening and maintaining many concurrent connections to a responder socket while continuing to queue new connection...

Linux Distros Unpatched Vulnerability : CVE-2026-104038

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. A remote attacker can cause a denial of service DoS by submitting a certificate that lacks an expected Security Identifier SID...