Security Bulletin: Linux Kernel vulnerability may affect IBM Elastic Storage System (CVE-2021-4203)

Summary

There is a vulnerability in Linux kernel, used by IBM Elastic Storage System, which could allow a denial of service.

Vulnerability Details

CVEID:CVE-2021-4203
**DESCRIPTION:**Linux Kernel is vulnerable to a denial of service, caused by a use-after-free read flaw in the sock_getsockopt() function in net/core/sock.c. By sending a specially-crafted request, a local authenticated attacker could exploit this vulnerability to crash the system or obtain internal kernel information.
CVSS Base score: 7.1
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/222609 for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H)

Affected Products and Versions

Remediation/Fixes

IBM recommends that you fix this vulnerability by upgrading affected versions of IBM Elastic Storage System 3000, 3200, 3500 and 5000 to the following code levels or higher:

V6.1.4.0 or later

https://www.ibm.com/support/fixcentral/swg/selectFixes?parent=Software%20defined%20storage&product=ibm/StorageSoftware/IBM+Elastic+Storage+Server+(ESS)&release=6.1.4&platform=All&function=all

V6.1.2.4 or later

https://www.ibm.com/support/fixcentral/swg/selectFixes?parent=Software%20defined%20storage&product=ibm/StorageSoftware/IBM+Elastic+Storage+Server+(ESS)&release=6.1.0&platform=All&function=all

Workarounds and Mitigations

None