Out-of-bounds Read Affecting libsss_idmap-devel package, versions <0:2.9.4-1.amzn2023.0.5


Severity

Recommended
0.0
medium
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.15% (5th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-AMZN2023-LIBSSSIDMAPDEVEL-22398480
  • published10 Nov 2026
  • disclosed6 Oct 2026

Introduced: 6 Oct 2026

CVE-2026-104042  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 libsss_idmap-devel to version 0:2.9.4-1.amzn2023.0.5 or higher.
This issue was patched in ALAS2023-2026-3416.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libsss_idmap-devel package and not the libsss_idmap-devel package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

A flaw was found in sssd. A local attacker can cause a Denial of Service (DoS) by sending a crafted Pluggable Authentication Module (PAM) request containing a zero-length authentication token to the responder socket. Due to missing input validation, the service attempts to read beyond buffer boundaries when processing the token, causing the PAM responder to crash.

CVSS Base Scores

version 3.1