Vulnerability Monitor

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CVE-2021-4028

A flaw in the Linux kernel's implementation of RDMA communications manager listener code allowed an attacker with local access to setup a socket to listen on a high port allowing for a list element to be used after free. Given the ability to execute code, a local attacker could leverage this use-after-free to crash the system or possibly escalate privileges on the system.

Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.8, requiring local system access to exploit with relatively low complexity without requiring user interaction requiring only low-level privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 2 products from linux, from suse organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2022, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2022-08-24T16:15:09.197

Last Modified

2024-11-21T06:36:45.057

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.8 (HIGH)

Weaknesses

Type: Secondary
CWE-416
Type: Secondary
CWE-416

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	linux	linux_kernel	< 5.10.71	Yes
Operating System	linux	linux_kernel	< 5.14.10	Yes
Operating System	suse	linux_enterprise	15.0	Yes
Operating System	suse	linux_enterprise	15.0	Yes

References

https://access.redhat.com/security/cve/CVE-2021-4028 Third Party Advisory ([email protected])
https://bugzilla.redhat.com/show_bug.cgi?id=2027201 Issue Tracking, Third Party Advisory ([email protected])
https://bugzilla.suse.com/show_bug.cgi?id=1193167#c0 Issue Tracking, Patch, Third Party Advisory ([email protected])
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bc0bdc5afaa74 Mailing List, Patch, Vendor Advisory ([email protected])
https://lkml.org/lkml/2021/10/4/697 Mailing List, Patch, Vendor Advisory ([email protected])
https://security.netapp.com/advisory/ntap-20221228-0002/ Third Party Advisory ([email protected])
https://access.redhat.com/security/cve/CVE-2021-4028 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.redhat.com/show_bug.cgi?id=2027201 Issue Tracking, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.suse.com/show_bug.cgi?id=1193167#c0 Issue Tracking, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bc0bdc5afaa74 Mailing List, Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lkml.org/lkml/2021/10/4/697 Mailing List, Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.netapp.com/advisory/ntap-20221228-0002/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For linux's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.