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VulnerabilityPublished

CVE-2026-112321: Red Hat Enterprise Linux 10 · Missing Release of Resource after Effective Lifetime

Affects Red Hat Enterprise Linux 10Source CVE Database V5

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Not known to be exploited · CVSS 7.5 High.

Data as of 9 Nov 2026, 20:32 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (redhat)CVSS 3.17.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 9 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 9 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Red Hat Enterprise Linux 10krb5Affected–Fixed in–
Red Hat Enterprise Linux 6krb5Affected–Fixed in–
Red Hat Enterprise Linux 7krb5Affected–Fixed in–
Red Hat Enterprise Linux 8krb5Affected–Fixed in–
Red Hat Enterprise Linux 9krb5Affected–Fixed in–
Red Hat Hardened Imageskrb5Affected–Fixed in–

AI-suggested

Restrict network access to the kadmind service to trusted hosts only. Alternatively, disable kadmind and use the kadmin.local server-side command line tool for administrative operations if feasible. These mitigations reduce exposure by limiting access to vulnerable services.

Description

CVE-2026-112321 is a vulnerability in the AUTH_GSSAPI handler of MIT Kerberos 5 used in Red Hat Enterprise Linux 10. It causes a denial of service by not freeing decoded arguments on certain error paths, leading to memory exhaustion in the kadmind service when processing crafted authentication requests. The issue affects administrative services processing legacy RPC authentication but does not impact standard Kerberos KDC authentication traffic. Exposure is limited to environments where kadmind is accessible from untrusted networks.

References

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