CVE-2026-90996

Sssd: sssd: denial of service in nss responder via crafted zero-length requests

MEDIUM
5.5
CVSS Score
Published: September 14, 2026 at 03:55 PM UTC
Updated: October 7, 2026 at 03:25 PM UTC
3 products affected across 2 vendorsEnterprise LinuxOpenShift Container PlatformSssd

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (2)

VDB Entryx_refsource_REDHATVendor Advisory
Source: cverecord
https://access.redhat.com/security/cve/CVE-2026-90996
Issue Trackingx_refsource_REDHATExploitMitigationVendor Advisory
Source: cverecord
https://bugzilla.redhat.com/show_bug.cgi?id=2478986

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-191

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