Buffer Access with Incorrect Length Value Affecting sssd package, versions *


Severity

Recommended
0.0
medium
0
10

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.01% (2nd percentile)

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  • Snyk IDSNYK-UBUNTU2604-SSSD-16239754
  • published24 May 2026
  • disclosed15 Apr 2026

Introduced: 15 Apr 2026

CVE-2026-6245  (opens in a new tab)
CWE-805  (opens in a new tab)

How to fix?

There is no fixed version for Ubuntu:26.04 sssd.

NVD Description

Note: Versions mentioned in the description apply only to the upstream sssd package and not the sssd package as distributed by Ubuntu. See How to fix? for Ubuntu:26.04 relevant fixed versions and status.

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).

CVSS Base Scores

version 3.1