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sssd

A vulnerability exists in sssd's PAM responder protocol v1 parser, pam_parse_in_data(), allowing a local client with access to the PAM responder's UNIX socket to cause an out-of-bounds read by sending an empty or truncated PAM request body. This can lead to the PAM responder terminating or restarting, resulting in a local denial of service.

CVE-2026-90994 describes a flaw in sssd's PAM responder protocol v1 parser function pam_parse_in_data(). A local client with UNIX socket access can exploit this by negotiating protocol v1 and sending an empty or truncated PAM request body, triggering an out-of-bounds read. This causes the PAM responder to terminate or restart, leading to a local denial of service condition.

A vulnerability exists in sssd's PAM responder protocol v1 parser, pam_parse_in_data(), allowing a local client with access to the PAM responder's UNIX socket to cause an out-of-bounds read by sending an empty or truncated PAM request body. This can lead to the PAM responder terminating or restartin

A flaw was found in sssd, specifically within the PAM (Pluggable Authentication Modules) responder's protocol v1 parser, pam_parse_in_data(). (CVE-2026-90994)

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