SB20240531298 - NULL pointer dereference in Linux kernel nfsd

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB20240531298

SB20240531298 - NULL pointer dereference in Linux kernel nfsd

Published: May 31, 2024 Updated: May 14, 2025

Security Bulletin ID SB20240531298
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) NULL pointer dereference (CVE-ID: CVE-2021-47507)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


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

The vulnerability exists due to NULL pointer dereference within the init_nfsd(), nfsd4_exit_pnfs() and exit_nfsd() functions in fs/nfsd/nfsctl.c, within the register_cld_notifier() function in fs/nfsd/nfs4recover.c. A local user can perform a denial of service (DoS) attack.


Remediation

Install update from vendor's website.

References