// For flags

CVE-2021-4028

kernel: use-after-free in RDMA listen()

Severity Score

7.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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.

Un fallo en la implementación del kernel de Linux del código de escucha del administrador de comunicaciones RDMA permitía a un atacante con acceso local configurar un socket para que escuchara en un puerto alto, lo que permitía un uso de memoria previamente liberada de un elemento de la lista. Dada la capacidad de ejecutar código, un atacante local podría aprovechar este uso de memoria previamente liberada para bloquear el sistema o posiblemente escalar privilegios en el sistema.

Red Hat Advanced Cluster Management for Kubernetes 2.3.10 images Red Hat Advanced Cluster Management for Kubernetes provides the capabilities to address common challenges that administrators and site reliability engineers face as they work across a range of public and private cloud environments. Clusters and applications are all visible and managed from a single console—with security policy built in. This advisory contains the container images for Red Hat Advanced Cluster Management for Kubernetes, which fix several bugs. Issues addressed include bypass and traversal vulnerabilities.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Local
Attack Complexity
Low
Authentication
Single
Confidentiality
Complete
Integrity
Complete
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-11-29 CVE Reserved
  • 2022-02-22 CVE Published
  • 2024-08-03 CVE Updated
  • 2025-06-20 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-416: Use After Free
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 5.10 < 5.10.71
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.10 < 5.10.71"
-
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 5.11 < 5.14.10
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.11 < 5.14.10"
-
Affected
Suse
Search vendor "Suse"
Linux Enterprise
Search vendor "Suse" for product "Linux Enterprise"
15.0
Search vendor "Suse" for product "Linux Enterprise" and version "15.0"
sp3
Affected
Suse
Search vendor "Suse"
Linux Enterprise
Search vendor "Suse" for product "Linux Enterprise"
15.0
Search vendor "Suse" for product "Linux Enterprise" and version "15.0"
sp4
Affected