What is CVE-2026-104042?

CVE-2026-104042 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2026-10-06.

How severe is CVE-2026-104042?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Out-of-bounds Read in Red Hat Enterprise Linux 10

CVE-2026-104042

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.

Vulnerability class: Buffer Overflow

Published 2026-10-06 · last modified 2026-10-06.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

access.redhat.com/security/cve/CVE-2026-104042 (vdb-entry)
bugzilla.redhat.com/show_bug.cgi (issue-tracking)

Frequently asked questions

What is CVE-2026-104042?: CVE-2026-104042 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2026-10-06.
How severe is CVE-2026-104042?: Medium severity. CVSS v3 base score is 5.5 out of 10.