CVE-2026-90463Hinoki check available

NSS responder crash via unchecked service requests

Published Sep 14, 2026 · Updated Sep 14, 2026

Out-of-bounds reads in the SSSD NSS responder allow local users to crash the responder through crafted service lookup requests. The sss_nss_protocol_parse_svc_name and sss_nss_protocol_parse_svc_port parsers fail to validate request fields before reading beyond their buffers. Unprivileged clients that can reach the responder's UNIX socket can interrupt NSS-backed identity lookups, with no demonstrated privilege escalation or reliable data disclosure.

CVSS severityUnavailable
Unscored
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Out-of-bounds reads in the SSSD NSS responder allow local users to crash the responder through crafted service lookup requests. The sss_nss_protocol_parse_svc_name and sss_nss_protocol_parse_svc_port parsers fail to validate request fields before reading beyond their buffers. Unprivileged clients that can reach the responder's UNIX socket can interrupt NSS-backed identity lookups, with no demonstrated privilege escalation or reliable data disclosure.

The record

CVE
CVE-2026-90463
Published
Sep 14, 2026
Updated
Sep 14, 2026
Vendor
Red Hat
Product
Red Hat Enterprise Linux 10
Classifications
T1499
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Red Hat · Red Hat Enterprise Linux 10Affected versions are unavailable in this record.
Red Hat · Red Hat Enterprise Linux 8Affected versions are unavailable in this record.
Red Hat · Red Hat Enterprise Linux 7Affected versions are unavailable in this record.
Red Hat · Red Hat Enterprise Linux 9Affected versions are unavailable in this record.
Red Hat · Red Hat OpenShift Container PlatformAffected versions are unavailable in this record.

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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