What is CVE-2026-112321?

CVE-2026-112321 is a high-severity vulnerability in Red Hat Enterprise Linux 10, classified under Missing Release of Resource after Effective Lifetime. CVSS score: 7.5/10. Published 2026-11-09.

How severe is CVE-2026-112321?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Red Hat Enterprise Linux 10

CVE-2026-112321

The AUTH_GSSAPI handler in lib/rpc/svc_auth_gssapi.c in MIT Kerberos 5 (aka krb5) does not free decoded arguments on certain error paths, which allows remote attackers to cause a denial of service (memory exhaustion in kadmind) via crafted AUTH_GSSAPI_INIT requests that trigger authentication failures.

Published 2026-11-09 · last modified 2026-11-09.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

CWE-772 — Missing Release of Resource after Effective Lifetime

References

access.redhat.com/security/cve/CVE-2026-112321 (vdb-entry)
bugzilla.redhat.com/show_bug.cgi (issue-tracking)

Frequently asked questions

What is CVE-2026-112321?: CVE-2026-112321 is a high-severity vulnerability in Red Hat Enterprise Linux 10, classified under Missing Release of Resource after Effective Lifetime. CVSS score: 7.5/10. Published 2026-11-09.
How severe is CVE-2026-112321?: High severity. CVSS v3 base score is 7.5 out of 10.