CVE-2026-104035 Sssd: sssd: denial of service via memory exhaustion in kcm responder
A local user can cause a denial of service in SSSD by exhausting memory through repeated credential operations in the KCM responder.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-104035?
CVE-2026-104035 is a medium-severity denial of service vulnerability in Red Hat Enterprise Linux 10, 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. An issue in the Kerberos Credential Manager (KCM) responder allows a local user to cause a Denial of Service (DoS) by maintaining a persistent connection and repeatedly storing and destroying credentials. Because the service fails to release cached objects from memory when credentials are removed, memory consumption grows continuously, ultimately exhausting available memory and rendering the service unresponsive.
Weakness: CWE-772
Which versions are affected by CVE-2026-104035?
How do I fix CVE-2026-104035?
No fix has been published for CVE-2026-104035 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-2026-104035 being exploited?
There is no known exploitation of CVE-2026-104035 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-104035, GHSA-mfvc-j8xf-5w4g, UBUNTU-CVE-2026-104035.