SB2021100723 - Denial of service in Linux kernel NFS subsystem

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Main Vulnerability Database SB2021100723

SB2021100723 - Denial of service in Linux kernel NFS subsystem

Published: October 7, 2021

Security Bulletin ID SB2021100723
Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 security vulnerability.


1) Out-of-bounds read (CVE-ID: CVE-2021-38201)

The vulnerability allows a remote user to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error within the net/sunrpc/xdr.c in the Linux kernel. A remote user can perform multiple NFS 4.2 READ_PLUS operations and cause a denial of service attack.

Remediation

Install update from vendor's website.

References