PT-2026-33133 · Sssd · Sssd

Published 2026-04-15 · Updated 2026-06-01 · CVE-2026-6245

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions System Security Services Daemon (SSSD) (affected versions not specified)

Description A flaw exists in the System Security Services Daemon (SSSD) where the pam passkey child read data() function within the PAM passkey responder fails to properly handle raw bytes received from a pipe. The data is treated as a NUL-terminated C string without explicit termination, leading to an out-of-bounds read when processed by functions such as snprintf(). A local attacker could trigger this by initiating a crafted passkey authentication request, causing the SSSD PAM responder to crash and resulting in a local Denial of Service (DoS).

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Weakness Enumeration

CWE-805

Related Identifiers

CVE-2026-6245

OESA-2026-2169

OESA-2026-2170

OESA-2026-2171

OPENSUSE-SU-2026:10659-1

USN-8355-1

Affected Products

Sssd

References · 19

• https://osv.dev/vulnerability/USN-8355-1 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-2171 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-6245 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10659-1 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-8355-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-6245 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-6245 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-6245 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-6245 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-2170 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-2169 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-6245 · Security Note
• https://suse.com/security/cve/CVE-2026-6245 · Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2457954 · Note
• https://twitter.com/CVEnew/status/2044737934385877061 · Twitter Post