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Vulnerability · Published Sep 14, 2026 · Assigned by redhat

CVE-2026-90995Sssd: sssd: local denial of service due to null pointer dereference in pam responder

Medium 5.5

In plain English

A medium-severity null pointer dereference in Red Hat Enterprise Linux 10 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities).

Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.1%top 97.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A flaw was found in SSSD (System Security Services Daemon). A local attacker with privileges to connect to the PAM (Pluggable Authentication Modules) responder socket can send a specially crafted protocol request. If the `pam_app_services` configuration is enabled and the service item is omitted from the request, a NULL pointer dereference can occur. This vulnerability leads to a denial of service, causing the PAM responder to crash and disrupt authentication services.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12sssdno fix listedDEBIAN-CVE-2026-90995
Debian:13sssdno fix listedDEBIAN-CVE-2026-90995
Ubuntu:22.04:LTSsssdno fix listedUBUNTU-CVE-2026-90995
Ubuntu:24.04:LTSsssdno fix listedUBUNTU-CVE-2026-90995
Ubuntu:26.04:LTSsssdno fix listedUBUNTU-CVE-2026-90995
Ubuntu:26.10sssdno fix listedUBUNTU-CVE-2026-90995

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

Weakness: CWE-476 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References