NULL pointer dereference in Fedoraproject Sssd
CVE-2026-90995
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.
Published · last modified .
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
EPSS: 0.001 (3.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 3.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.001 · change: -0.000
Affected products
- Fedoraproject Sssd — versions 2.12.0
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat Openshift Container Platform 4
- Red Hat Enterprise Linux — versions 10.0, 7.0, 8.0
- Red Hat Openshift Container Platform — versions 4.0
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-90995 (Mitigation, vdb-entry, Vendor Advisory)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking, Exploit, Mitigation, Issue Tracking, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-90995?
- CVE-2026-90995 is a medium-severity vulnerability in Fedoraproject Sssd, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2026-09-14.
- How severe is CVE-2026-90995?
- Medium severity. CVSS v3 base score is 5.5 out of 10.