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CVE-2021-4028

Date: August 23, 2022

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.

Severity Score

Related Resources (10)

https://security-tracker.debian.org/tracker/CVE-2021-4028
https://security.netapp.com/advisory/ntap-20221228-0002/
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bc0bdc5afaa74
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-4028
https://bugzilla.redhat.com/show_bug.cgi?id=2027201
https://bugzilla.suse.com/show_bug.cgi?id=1193167#c0
https://lkml.org/lkml/2021/10/4/697
https://access.redhat.com/security/cve/CVE-2021-4028
https://nvd.nist.gov/vuln/detail/CVE-2021-4028
https://www.mend.io/vulnerability-database/CVE-2021-4028

Severity Score

Weakness Type (CWE)

Use After Free

CWE-416

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

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