CVE-2026-6245
Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
15/04/2026
Last modified:
15/04/2026
Description
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).
Impact
Base Score 3.x
5.50
Severity 3.x
MEDIUM