Is CVE-2021-2464 being actively exploited?

CVE-2021-2464 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2021-2464?

CVE-2021-2464 has a CVSS 3.1 base score of 7.8 (HIGH).

CVE-2021-2464

HIGH · CVSS 7.8EPSS 0.3%EU EUVD

Vulnerability in Oracle Linux (component: OSwatcher). Supported versions that are affected are 7 and 8. Easily exploitable vulnerability allows low privileged attacker with logon to the infrastructure where Oracle Linux executes to compromise Oracle Linux. Successful attacks of this vulnerability can result in takeover of Oracle Linux. CVSS 3.1 Base Score 7.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

Key facts

CVSS score: 7.8 (v3.1)
Severity: HIGH
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS score: 0.3% (25th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2021-16923)
Published: September 24, 2021
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2021-16923 in the EU Vulnerability Database. Last updated in EUVD on September 25, 2024.

View on the EU Vulnerability Database

Affected products

oracle / engineered systems utilities
oracle / engineered systems utilities
oracle / engineered systems utilities
oracle / linux
oracle / linux

Certified products that may be affected

26 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Oracle Linux 8 Unbreakable Enterprise Kernel (UEK7) Cryptographic Module and Oracle Linux 9 Unbreakable Enterprise Kernel (UEK7) Cryptographic Module - Oracle Corporation - FIPS 140 4739 - active
Oracle Linux 7 NSS Cryptographic Module - Oracle Corporation - FIPS 140 4586 - historical
Oracle Linux 7 Libreswan Cryptographic Module - Oracle Corporation - FIPS 140 4266 - historical
Oracle Linux 8 libgcrypt Cryptographic Module - Oracle Corporation - FIPS 140 4232 - historical
Oracle Linux 8 GnuTLS Cryptographic Module - Oracle Corporation - FIPS 140 4229 - historical

See all 26 in the Security Certifications Explorer.

References

https://linux.oracle.com/errata/ELSA-2021-9444.html(Vendor Advisory)
https://www.oracle.com/security-alerts/cpuapr2022.html(Patch, Vendor Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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