This page tracks the Ubuntu fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-90994 →

UBUNTU-CVE-2026-90994

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

Original description

The description as published by the source.

A flaw was found in sssd, specifically within the PAM (Pluggable Authentication Modules) responder's protocol v1 parser, pam_parse_in_data(). A local client with access to the PAM responder's UNIX socket can exploit this by negotiating protocol v1 and sending an empty or truncated PAM request body. This can trigger an out-of-bounds read, potentially causing the PAM responder to terminate or restart, leading to a local denial of service.

Source: OSV.dev (Open Source Vulnerabilities) OSV