CVE-2026-112320
Krb5: mit krb5 kadmind unauthenticated memory leak dos via gss-rpc auth flavor switching
No exploitation reported by the sources we read.
- Published2026-11-09
- WeaknessCWE-772
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
The GSS-RPC transport layer in MIT Kerberos 5 (aka krb5) 1.4 and later does not release the previous authentication context when a client switches from an RPCSEC_GSS or AUTH_GSSAPI flavor to a non-GSS flavor on the same TCP connection. This allows remote attackers to cause a denial of service (memory exhaustion in kadmind) by repeatedly establishing and abandoning GSS authentication contexts.
Timeline
dates in UTC- 2026-11-0919:08CVE publishedCNA
Versions per branch
Products declared by the CNA
As redhat, the CNA that assigned this CVE, declared them in the CVE record; versions as written. NVD lists no product for this CVE yet: this is the only product data so far.
- Red Hat Enterprise Linux 10other versions: affected
package krb5https://access.redhat.com/downloads/content/package-browser/
- Red Hat Enterprise Linux 6other versions: unknown
package krb5https://access.redhat.com/downloads/content/package-browser/
- Red Hat Enterprise Linux 7other versions: affected
package krb5https://access.redhat.com/downloads/content/package-browser/
- Red Hat Enterprise Linux 8other versions: affected
package krb5https://access.redhat.com/downloads/content/package-browser/
- Red Hat Enterprise Linux 9other versions: affected
package krb5https://access.redhat.com/downloads/content/package-browser/
- Red Hat Hardened Imagesother versions: affected
package krb5https://access.redhat.com/downloads/content/package-browser/
Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-11-09
Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-112320 yet.
Fix
No fix published by the sources we read yet. NVD record
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Metasploit modules
- none listed Metasploit Framework
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Published
- 2026-11-09
- Last Modified
- 2026-11-09
- NVD status
- Awaiting Analysis
Frequently asked questions
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