Local credential-cache interruption via KCM preallocation
Published Oct 6, 2026 · Updated Oct 6, 2026
Memory exhaustion in Red Hat Enterprise Linux SSSD KCM allows local users to interrupt Kerberos credential caching. The KCM responder preallocates memory from an untrusted request-length header before receiving the full request, so a client that stalls on the UNIX socket can exhaust responder memory. Red Hat OpenShift Container Platform is also listed as affected; exploitation requires access to the local KCM socket, including from a container granted that socket.
Summary
What happened
Memory exhaustion in Red Hat Enterprise Linux SSSD KCM allows local users to interrupt Kerberos credential caching. The KCM responder preallocates memory from an untrusted request-length header before receiving the full request, so a client that stalls on the UNIX socket can exhaust responder memory. Red Hat OpenShift Container Platform is also listed as affected; exploitation requires access to the local KCM socket, including from a container granted that socket.
The record
- CVE
- CVE-2026-80048
- Published
- Oct 6, 2026
- Updated
- Oct 6, 2026
- Vendor
- libuser Project
- Product
- Red Hat OpenShift Container Platform
- Classifications
- T1499.004
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Oct 6, 2026CVE publishedPublication date reported by the CVE source.
- Oct 6, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Activity data is delayed. The latest report is Sep 28, 2026.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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