Local authentication-service crash via omitted PAM service
Published Sep 14, 2026 · Updated Sep 14, 2026
NULL pointer dereference in Red Hat SSSD's PAM responder allows local users to crash authentication through a crafted request. When pam_app_services is enabled, the responder accepts a request that omits the service item and dereferences the resulting NULL value. Access to the local PAM responder socket is required, and exploitation interrupts SSSD-backed authentication until the responder recovers.
Summary
What happened
NULL pointer dereference in Red Hat SSSD's PAM responder allows local users to crash authentication through a crafted request. When pam_app_services is enabled, the responder accepts a request that omits the service item and dereferences the resulting NULL value. Access to the local PAM responder socket is required, and exploitation interrupts SSSD-backed authentication until the responder recovers.
The record
- CVE
- CVE-2026-90995
- Published
- Sep 14, 2026
- Updated
- Sep 14, 2026
- Vendor
- Red Hat
- Product
- Red Hat Enterprise Linux 10
- Classifications
- T1499
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 14, 2026CVE publishedPublication date reported by the CVE source.
- Sep 14, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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