Log in Start free

Vulnerability · Published Oct 6, 2026 · Assigned by redhat

CVE-2026-104042Sssd: sssd: denial of service via out-of-bounds read in pam responder

Medium 5.5

In plain English

A medium-severity out-of-bounds read in Red Hat Enterprise Linux 10 from Red Hat. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 5% of all known vulnerabilities).

Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.2%top 95.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12sssdno fix listedDEBIAN-CVE-2026-104042
Debian:13sssdno fix listedDEBIAN-CVE-2026-104042
Ubuntu:22.04:LTSsssdno fix listedUBUNTU-CVE-2026-104042
Ubuntu:24.04:LTSsssdno fix listedUBUNTU-CVE-2026-104042
Ubuntu:26.04:LTSsssdno fix listedUBUNTU-CVE-2026-104042
Ubuntu:26.10sssdno fix listedUBUNTU-CVE-2026-104042

Affected products (as reported)

VendorProductVersions
Red Hat Red Hat Enterprise Linux 10 see references
Red Hat Red Hat Enterprise Linux 6 see references
Red Hat Red Hat Enterprise Linux 7 see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat OpenShift Container Platform 4 see references
Red Hat Red Hat OpenShift Container Platform 4 see references
Red Hat Red Hat OpenShift Container Platform 5 see references

Weakness: CWE-125 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References