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Vendor Workaround
A workaround is available for this issue. PAM GSSAPI authentication can be disabled in the SSSD configuration: edit /etc/sssd/sssd.conf, and in the [pam] section remove or comment out the pam_gssapi_services option (or set it to an empty value), so that no service is permitted to use GSSAPI authentication through the PAM responder. Then restart the SSSD service (systemctl restart sssd) to apply the change. Note that disabling PAM GSSAPI authentication prevents clients from authenticating to the affected PAM services using Kerberos tickets, requiring them to use alternative authentication methods such as passwords. Restarting the SSSD service also briefly disrupts ongoing authentication requests. Restarting the PAM responder can restore service after a crash, but it does not remove the underlying flaw.
Tracking
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Thu, 08 Oct 2026 03:30:00 +0000
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ssvc
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Tue, 06 Oct 2026 21:15:00 +0000
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| First Time appeared |
Redhat openshift Container Platform
Sssd Sssd sssd |
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| Vendors & Products |
Redhat openshift Container Platform
Sssd Sssd sssd |
Tue, 06 Oct 2026 12:15:00 +0000
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threat_severity
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threat_severity
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Tue, 06 Oct 2026 01:30:00 +0000
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| Description | A flaw was found in SSSD. A local user can cause a denial of service (DoS) by disrupting system authentication services. When handling Generic Security Services Application Programming Interface (GSSAPI) authentication in the Pluggable Authentication Module (PAM) responder, cached connection state is freed upon completion without clearing the reference pointer. An attacker can exploit this by sending an additional request over the same connection, causing the service to access invalid memory and unexpectedly terminate. | |
| Title | Sssd: sssd: denial of service via stale connection state reuse in pam gssapi responder | |
| First Time appeared |
Redhat
Redhat enterprise Linux Redhat openshift |
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| Weaknesses | CWE-825 | |
| 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 |
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| Vendors & Products |
Redhat
Redhat enterprise Linux Redhat openshift |
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| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: redhat
Published:
Updated: 2026-10-16T10:57:46.726Z
Reserved: 2026-10-01T17:23:22.525Z
Link: CVE-2026-104039
Updated: 2026-10-08T02:40:02.273Z
Status : Undergoing Analysis
Published: 2026-10-06T02:17:03.013
Modified: 2026-10-08T03:16:33.053
Link: CVE-2026-104039
OpenCVE Enrichment
Updated: 2026-10-06T20:56:12Z
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CWE-825
Expired Pointer Dereference