CVE-2026-104036

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.

CVSS v3 5.8 MEDIUM

5.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.0 / Impact : 4.7

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact HIGH

Scope UNCHANGED

References

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

Configurations

No configuration.

History

06 Oct 2026, 01:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-06 01:16

Updated : 2026-10-06 15:09

NVD link : CVE-2026-104036

Mitre link : CVE-2026-104036

CVE.ORG link : CVE-2026-104036

JSON object : View

Products Affected

No product.

CWE

CWE-787

Out-of-bounds Write

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