A flaw was found in SSSD's NFS idmap plugin. When retrieving cached user or group names, the plugin detects if an entry exceeds the destination buffer size but fails to abort before copying data. A local attacker can trigger this vulnerability by requesting identity lookups that resolve to oversized cached entries, resulting in an out-of-bounds write. This flaw primarily leads to a Denial of Service (DoS) by crashing the identity mapping service, and may also corrupt adjacent process memory.

No CVSS v4.0

Attack Vector Local

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Red Hat Red Hat Enterprise Linux 10 affected —
Red Hat Red Hat Enterprise Linux 6 unknown —
Red Hat Red Hat Enterprise Linux 7 affected —
Red Hat Red Hat Enterprise Linux 8 affected —
Red Hat Red Hat Enterprise Linux 9 affected —
Red Hat Red Hat OpenShift Container Platform 4 affected —
Red Hat Red Hat OpenShift Container Platform 4 affected —

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

No data.

Project Subscriptions

Vendors Products
Redhat Subscribe
Enterprise Linux Subscribe
Openshift Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://access.redhat.com/security/cve/CVE-2026-104036 cve-icon cve-icon
https://bugzilla.redhat.com/show_bug.cgi?id=2479057 cve-icon cve-icon
History

Tue, 06 Oct 2026 00:45:00 +0000

Type Values Removed Values Added
Description A flaw was found in SSSD's NFS idmap plugin. When retrieving cached user or group names, the plugin detects if an entry exceeds the destination buffer size but fails to abort before copying data. A local attacker can trigger this vulnerability by requesting identity lookups that resolve to oversized cached entries, resulting in an out-of-bounds write. This flaw primarily leads to a Denial of Service (DoS) by crashing the identity mapping service, and may also corrupt adjacent process memory.
Title Sssd: sssd: denial of service via out-of-bounds write in nfs idmap plugin
First Time appeared Redhat
Redhat enterprise Linux
Redhat openshift
Weaknesses CWE-787
CPEs cpe:/a:redhat:openshift:4
cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:6
cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
Redhat openshift
References
Metrics cvssV3_1

{'score': 5.8, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H'}

Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-10-06T00:12:20.485Z

Reserved: 2026-10-01T17:22:16.764Z

Link: CVE-2026-104036

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-06T01:16:34.567

Modified: 2026-10-06T01:16:34.567

Link: CVE-2026-104036

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-06T02:00:17Z

Weaknesses