How severe is CVE-2021-3979?

CVE-2021-3979 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-3979 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-3979?

CVE-2021-3979 primarily affects Redhat Ceph Storage. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-3979?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-3979 published?

CVE-2021-3979 was published on 2022-08-25 and last updated on 2026-06-17.

CVE-2021-3979

CVE-2021-3979 is a medium-severity vulnerability in Redhat Ceph Storage with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Redhat Ceph Storage
Published: 2022-08-25
Last modified: 2026-06-17

Description

A key length flaw was found in Red Hat Ceph Storage. An attacker can exploit the fact that the key length is incorrectly passed in an encryption algorithm to create a non random key, which is weaker and can be exploited for loss of confidentiality and integrity on encrypted disks.

Frequently asked questions

What is CVE-2021-3979?: A key length flaw was found in Red Hat Ceph Storage. An attacker can exploit the fact that the key length is incorrectly passed in an encryption algorithm to create a non random key, which is weaker and can be exploited for loss of confidentiality and integrity on encrypted disks.
How severe is CVE-2021-3979?: CVE-2021-3979 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-3979 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-3979?: CVE-2021-3979 primarily affects Redhat Ceph Storage. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-3979?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-3979 published?: CVE-2021-3979 was published on 2022-08-25 and last updated on 2026-06-17.

References

Affected products (12)

cpe:2.3:a:redhat:ceph_storage:3.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:ceph_storage:4.3:*:*:*:*:*:*:*
cpe:2.3:a:redhat:ceph_storage:5.1:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openshift_container_storage:4.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openshift_data_foundation:4.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openstack_platform:13.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:ceph_storage_for_ibm_z_systems:4.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:ceph_storage:4.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:ceph_storage:5.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:ceph_storage_for_power:4.0:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*

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