CVE-2021-4028

Published: Aug 24, 2022Modified: Jun 17, 2026

7.8

Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitability: 1.8 / Impact: 5.9

Source: NVD

Description

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.

Affected (4)

Products: Linux: Linux Kernel · Suse: Linux Enterprise

1 product

1 product

Linux Enterprise

Configuration A

2 vulnerable

Vulnerable Software	Affected Versions
Linux Linux Kernel	From 5.10 to 5.10.71
Linux Linux Kernel	From 5.11 to 5.14.10

Configuration B

2 vulnerable

Vulnerable Software	Affected Versions
Suse Linux Enterprise	Version 15.0 sp3
Suse Linux Enterprise	Version 15.0 sp4

Related CWEs

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

References (12)

https://access.redhat.com/security/cve/CVE-2021-4028

Source: secalert@redhat.com

Third Party Advisory

https://bugzilla.redhat.com/show_bug.cgi?id=2027201

Source: secalert@redhat.com

Issue TrackingThird Party Advisory

https://bugzilla.suse.com/show_bug.cgi?id=1193167#c0

Source: secalert@redhat.com

Issue TrackingPatchThird Party Advisory

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bc0bdc5afaa74

Source: secalert@redhat.com

Mailing ListPatchVendor Advisory

https://lkml.org/lkml/2021/10/4/697

Source: secalert@redhat.com

Mailing ListPatchVendor Advisory

https://security.netapp.com/advisory/ntap-20221228-0002/

Source: secalert@redhat.com

Third Party Advisory

https://access.redhat.com/security/cve/CVE-2021-4028

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

https://bugzilla.redhat.com/show_bug.cgi?id=2027201

Source: af854a3a-2127-422b-91ae-364da2661108

Issue TrackingThird Party Advisory

https://bugzilla.suse.com/show_bug.cgi?id=1193167#c0

Source: af854a3a-2127-422b-91ae-364da2661108

Issue TrackingPatchThird Party Advisory

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bc0bdc5afaa74

Source: af854a3a-2127-422b-91ae-364da2661108

Mailing ListPatchVendor Advisory

https://lkml.org/lkml/2021/10/4/697

Source: af854a3a-2127-422b-91ae-364da2661108

Mailing ListPatchVendor Advisory

https://security.netapp.com/advisory/ntap-20221228-0002/

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

Timeline

No history available yet.