CVE-2026-104046 Sssd: sssd: denial of service via incomplete identity provider authentication requests
A local attacker can cause a Denial of Service in SSSD by exhausting memory through incomplete identity provider authentication requests.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-104046?
CVE-2026-104046 is a medium-severity denial of service vulnerability in Redhat Enterprise Linux, published on 6 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A flaw was found in SSSD (System Security Services Daemon). When Identity Provider (IdP) authentication is enabled, pre-authentication requests retain state in memory without being cleared or timed out. A local attacker can repeatedly initiate authentication flows without completing them, causing unbounded memory consumption. This memory exhaustion can lead to a Denial of Service (DoS) by degrading or terminating SSSD authentication services.
Weakness: CWE-770
Which versions are affected by CVE-2026-104046?
It affects 3 products.
Products include Fedoraproject Sssd, Redhat Enterprise Linux, Redhat Openshift Container Platform.
How do I fix CVE-2026-104046?
No fix has been published for CVE-2026-104046 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-104046 being exploited?
There is no known exploitation of CVE-2026-104046 in the wild and no public exploit code.
Other vulnerabilities in Redhat Enterprise Linux
Sources
Also known as DEBIAN-CVE-2026-104046, GHSA-35vq-gvvv-mccw, UBUNTU-CVE-2026-104046.