CVE-2026-104030: Out-of-bounds Read in Red Hat Red Hat Enterprise Linux 10
Description
CVE-2026-104030 is a vulnerability in the sssd component of Red Hat Enterprise Linux 10. It allows a local user to cause a Denial of Service (DoS) by submitting a specially crafted passkey authentication token that lacks null terminators. This causes an out-of-bounds read, leading to a process crash and disruption of authentication services. The vulnerability has a medium severity rating with a CVSS score of 5.5.
CVSS v3.1
Score 5.5medium
Affected software
Red Hat
Red Hat Enterprise Linux 10
Red Hat
Red Hat Enterprise Linux 6
Red Hat
Red Hat Enterprise Linux 7
Red Hat
Red Hat Enterprise Linux 8
Red Hat
Red Hat Enterprise Linux 9
Red Hat
Red Hat OpenShift Container Platform 4
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in sssd of Red Hat Enterprise Linux 10 involves an out-of-bounds read triggered by a local user submitting a malformed passkey authentication token missing null terminators. The authentication service reads beyond the allocated memory buffer, causing the process to crash and resulting in denial of service by disrupting authentication services. The CVSS 3.1 vector indicates local attack vector, low complexity, low privileges required, no user interaction, unchanged scope, no confidentiality or integrity impact, and high availability impact.
Potential Impact
A local attacker can cause a denial of service by crashing the authentication service, disrupting authentication on the affected system. There is no impact on confidentiality or integrity, only availability is affected.
Mitigation Recommendations
Patch status is not yet confirmed — check the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2026-104030 for current remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-10-01T17:20:01.039Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-104030","vendor":"Red Hat"}]
Threat ID: 6ac3f82f2cdf04f6563003d8
Added to database: 10/05/2026, 19:19:11 UTC
Last enriched: 10/05/2026, 19:34:03 UTC
Last updated: 10/05/2026, 19:34:03 UTC
Views: 10
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