How severe is CVE-2021-22600?

CVE-2021-22600 has a CVSS 3.x base score of 6.6, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability high.

Is CVE-2021-22600 being actively exploited?

Yes. CVE-2021-22600 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-04-11, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2021-22600?

CVE-2021-22600 primarily affects Netapp 8300 Firmware. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-22600?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2021-22600 have an EU (EUVD) identifier?

Yes. CVE-2021-22600 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-9736. It is also flagged as exploited in the EUVD (since 2022-04-11).

When was CVE-2021-22600 published?

CVE-2021-22600 was published on 2022-01-26 and last updated on 2026-06-17.

CVE-2021-22600

CVE-2021-22600 is a medium-severity vulnerability in Netapp 8300 Firmware with a CVSS 3.x base score of 6.6. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2022-04-11). The underlying weakness is classified as CWE-415.

Key facts

Severity: Medium (CVSS 3.x base score 6.6)
CVSS v2: 7.2
EPSS exploit prediction: 6% (92nd percentile)
Actively exploited: Yes — listed in CISA KEV (added 2022-04-11)
EU (EUVD) id: EUVD-2021-9736
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2022-04-11)
Weakness: CWE-415
Affected product: Netapp 8300 Firmware
Published: 2022-01-26
Last modified: 2026-06-17

Description

A double free bug in packet_set_ring() in net/packet/af_packet.c can be exploited by a local user through crafted syscalls to escalate privileges or deny service. We recommend upgrading kernel past the effected versions or rebuilding past ec6af094ea28f0f2dda1a6a33b14cd57e36a9755

Frequently asked questions

What is CVE-2021-22600?: A double free bug in packet_set_ring() in net/packet/af_packet.c can be exploited by a local user through crafted syscalls to escalate privileges or deny service. We recommend upgrading kernel past the effected versions or rebuilding past ec6af094ea28f0f2dda1a6a33b14cd57e36a9755
How severe is CVE-2021-22600?: CVE-2021-22600 has a CVSS 3.x base score of 6.6, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability high.
Is CVE-2021-22600 being actively exploited?: Yes. CVE-2021-22600 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-04-11, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2021-22600?: CVE-2021-22600 primarily affects Netapp 8300 Firmware. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-22600?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2021-22600 have an EU (EUVD) identifier?: Yes. CVE-2021-22600 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-9736. It is also flagged as exploited in the EUVD (since 2022-04-11).
When was CVE-2021-22600 published?: CVE-2021-22600 was published on 2022-01-26 and last updated on 2026-06-17.

References

Affected products (12)

cpe:2.3:o:netapp:8300_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:netapp:8700_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:netapp:a400_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:netapp:c400_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:netapp:h410c_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:*

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