How severe is CVE-2021-3772?

CVE-2021-3772 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability high.

Is CVE-2021-3772 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-3772?

CVE-2021-3772 primarily affects Redhat Enterprise Linux. In total, 36 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-3772?

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

When was CVE-2021-3772 published?

CVE-2021-3772 was published on 2022-03-02 and last updated on 2026-06-17.

CVE-2021-3772

CVE-2021-3772 is a medium-severity vulnerability in Redhat Enterprise Linux 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-354.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 5.8
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-354
Affected product: Redhat Enterprise Linux
Published: 2022-03-02
Last modified: 2026-06-17

Description

A flaw was found in the Linux SCTP stack. A blind attacker may be able to kill an existing SCTP association through invalid chunks if the attacker knows the IP-addresses and port numbers being used and the attacker can send packets with spoofed IP addresses.

Frequently asked questions

What is CVE-2021-3772?: A flaw was found in the Linux SCTP stack. A blind attacker may be able to kill an existing SCTP association through invalid chunks if the attacker knows the IP-addresses and port numbers being used and the attacker can send packets with spoofed IP addresses.
How severe is CVE-2021-3772?: CVE-2021-3772 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability high.
Is CVE-2021-3772 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-3772?: CVE-2021-3772 primarily affects Redhat Enterprise Linux. In total, 36 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-3772?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-3772 published?: CVE-2021-3772 was published on 2022-03-02 and last updated on 2026-06-17.

References

Affected products (36)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_cloud_native_core_binding_support_function:22.1.3:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_cloud_native_core_network_exposure_function:22.1.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_cloud_native_core_policy:22.2.0:*:*:*:*:*:*:*
cpe:2.3:a:netapp:e-series_santricity_os_controller:11.0:*:*:*:*:*:*:*
cpe:2.3:a:netapp:e-series_santricity_os_controller:11.0.0:*:*:*:*:*:*:*
cpe:2.3:a:netapp:e-series_santricity_os_controller:11.20:*:*:*:*:*:*:*
cpe:2.3:a:netapp:e-series_santricity_os_controller:11.25:*:*:*:*:*:*:*
cpe:2.3:a:netapp:e-series_santricity_os_controller:11.30:*:*:*:*:*:*:*
cpe:2.3:a:netapp:e-series_santricity_os_controller:11.30.5r3:*:*:*:*:*:*:*
cpe:2.3:a:netapp:e-series_santricity_os_controller:11.40:*:*:*:*:*:*:*
cpe:2.3:a:netapp:e-series_santricity_os_controller:11.40.3r2:*:*:*:*:*:*:*
cpe:2.3:a:netapp:e-series_santricity_os_controller:11.40.5:*:*:*:*:*:*:*
cpe:2.3:a:netapp:e-series_santricity_os_controller:11.50.1:*:*:*:*:*:*:*
cpe:2.3:a:netapp:e-series_santricity_os_controller:11.50.2:-:*:*:*:*:*:*
cpe:2.3:a:netapp:e-series_santricity_os_controller:11.50.2:p1:*:*:*:*:*:*
cpe:2.3:a:netapp:e-series_santricity_os_controller:11.60:*:*:*:*:*:*:*
cpe:2.3:a:netapp:e-series_santricity_os_controller:11.60.0:*:*:*:*:*:*:*
cpe:2.3:a:netapp:e-series_santricity_os_controller:11.60.1:*:*:*:*:*:*:*
cpe:2.3:a:netapp:e-series_santricity_os_controller:11.60.3:*:*:*:*:*:*:*
cpe:2.3:a:netapp:e-series_santricity_os_controller:11.70.1:*:*:*:*:*:*:*
cpe:2.3:a:netapp:e-series_santricity_os_controller:11.70.2:*:*:*:*:*:*:*
cpe:2.3:a:netapp:solidfire_\&_hci_management_node:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:solidfire_\&_hci_storage_node:-:*:*:*:*:*:*:*
cpe:2.3:h:netapp:hci_compute_node:-:*:*:*:*:*:*:*
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:-:*:*:*:*:*:*:*
cpe:2.3:o:netapp:h410c_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:netapp:h610c_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:netapp:h610s_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:netapp:h615c_firmware:-:*:*:*:*:*:*:*

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