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Vendor Workaround
Set `entry_negative_timeout = 0` in the `[nss]` section of `/etc/sssd/sssd.conf` to disable non-permanent negative-cache insertions, then restart the SSSD service (for example, `systemctl restart sssd`) to apply the change. Note that restarting sssd briefly interrupts active authentication and identity lookups, and disabling the negative cache increases lookup traffic to identity backends for nonexistent entries. If responder memory growth is observed, the accumulated negative-cache state can be cleared through the existing operational clear path or by restarting the responder. Restricting untrusted local users also limits exposure on systems where the NSS responder socket is reachable by local users.
Tracking
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Tue, 06 Oct 2026 14:30:00 +0000
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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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 04:15:00 +0000
| Type | Values Removed | Values Added |
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| First Time appeared |
Sssd
Sssd sssd |
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| Vendors & Products |
Sssd
Sssd sssd |
Tue, 06 Oct 2026 01:30:00 +0000
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| Description | A flaw was found in SSSD. An unprivileged local user can repeatedly request lookups for nonexistent entries through the Name Service Switch (NSS) responder. Because the negative cache does not limit the total number of stored entries and only removes expired records when an existing key is rechecked, the cache can grow without bound. This behavior can lead to memory exhaustion, resulting in a Denial of Service (DoS) as the responder becomes unresponsive or terminates. | |
| Title | Sssd: sssd: denial of service via unbounded negative cache growth | |
| First Time appeared |
Redhat
Redhat enterprise Linux Redhat openshift |
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| Weaknesses | CWE-770 | |
| 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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cvssV3_1
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Status: PUBLISHED
Assigner: redhat
Published:
Updated: 2026-10-16T10:57:48.588Z
Reserved: 2026-10-01T17:24:07.171Z
Link: CVE-2026-104041
Updated: 2026-10-06T13:19:30.987Z
Status : Awaiting Analysis
Published: 2026-10-06T02:17:03.327
Modified: 2026-10-06T15:09:20.387
Link: CVE-2026-104041
OpenCVE Enrichment
Updated: 2026-10-06T04:00:12Z
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CWE-770
Allocation of Resources Without Limits or Throttling