Integer overflow in Fedoraproject Sssd
CVE-2026-90996
A flaw was found in sssd. A local unprivileged user could send a specially crafted request with a zero-length body to the Network Security Services (NSS) responder. This could lead to a denial-of-service condition, causing the NSS responder to become unstable or terminate. This vulnerability affects the availability of the system responder.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.0 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.001 (2.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 2.5% 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-2026-90996 (vdb-entry, Vendor Advisory)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking, Exploit, Mitigation, Issue Tracking, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-90996?
- CVE-2026-90996 is a medium-severity vulnerability in Fedoraproject Sssd, classified under Integer Underflow. CVSS score: 4.0/10. Published 2026-09-14.
- How severe is CVE-2026-90996?
- Medium severity. CVSS v3 base score is 4.0 out of 10.