PatchTheCVECVE-2024-26462: Kerberos 5 (aka krb5) 1.21.2 contains a memory leak vulnerability in /krb5/src/kdc/ndr.c.
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Routine
MEDIUM 5.5DOWNGRADEMITIGATEMITIGATE
CVE-2024-26462 is a medium-severity flaw (CVSS 5.5) affecting kerberos 5, active iq unified manager, cloud volumes ontap mediator. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Kerberos 5 (aka krb5) 1.21.2 contains a memory leak vulnerability in /krb5/src/kdc/ndr.c.
Why this priority
- Public exploit reference
No fix is published yet: follow the downgrade or mitigation steps.
Risk facts
| CVSS score | 5.5 (Medium) |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.4% (top 62%) |
| CISA exploited list | No |
| Weakness | CWE-401 |
| Published | 2024-02-29 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
mit kerberos 5 DOWNGRADE
Affected: 1.21.2
Fixed in: no fixed release known
Safe to downgrade to: a release before 1.21.2
1. Check installed version
apt-cache policy kerberos-5 || rpm -q kerberos-5 || kerberos-5 --version
2. No fixed release: DOWNGRADE to a release before 1.21.2 (Debian / Ubuntu)
apt-cache madison kerberos-5
sudo apt install kerberos-5=<VERSION_BEFORE_1.21.2>
sudo apt-mark hold kerberos-5
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list kerberos-5
sudo dnf downgrade kerberos-5-<VERSION_BEFORE_1.21.2>
sudo dnf versionlock add kerberos-5
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
netapp active iq unified manager MITIGATE
Affected: all versions
Fixed in: no fixed release known
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy active-iq-unified-manager || rpm -q active-iq-unified-manager || active-iq-unified-manager --version
No fixed or unaffected release known
Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.
netapp cloud volumes ontap mediator MITIGATE
Affected: all versions
Fixed in: no fixed release known
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy cloud-volumes-ontap-mediator || rpm -q cloud-volumes-ontap-mediator || cloud-volumes-ontap-mediator --version
No fixed or unaffected release known
Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.
netapp management services for element software and netapp hci MITIGATE
Affected: all versions
Fixed in: no fixed release known
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy management-services-for-element-software-and-netapp-hci || rpm -q management-services-for-element-software-and-netapp-hci || management-services-for-element-software-and-netapp-hci --version
No fixed or unaffected release known
Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.
netapp ontap select deploy administration utility MITIGATE
Affected: all versions
Fixed in: no fixed release known
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy ontap-select-deploy-administration-utility || rpm -q ontap-select-deploy-administration-utility || ontap-select-deploy-administration-utility --version
No fixed or unaffected release known
Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.
netapp h610c firmware MITIGATE
Affected: all versions
Fixed in: no fixed release known
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2024-26462?
kerberos 5: downgrade or apply the listed mitigation; active iq unified manager: mitigate or apply the listed mitigation; cloud volumes ontap mediator: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2024-26462 being exploited?
CVE-2024-26462 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2024-26462 affect?
CVE-2024-26462 affects kerberos 5, active iq unified manager, cloud volumes ontap mediator. Severity is medium (CVSS 5.5). Kerberos 5 (aka krb5) 1.21.2 contains a memory leak vulnerability in /krb5/src/kdc/ndr.c.
How urgent is CVE-2024-26462?
Priority 34/100. Public exploit reference
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