SB20240531311 - NULL pointer dereference in Linux kernel ipv4
Published: May 31, 2024 Updated: May 14, 2025
Security Bulletin ID
SB20240531311
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) NULL pointer dereference (CVE-ID: CVE-2021-47572)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the nh_create_ipv6() function in net/ipv4/nexthop.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/7b6f44856da5ba0b1aa61403eb9fddd272156503
- https://git.kernel.org/stable/c/b70ff391deeec35cdd8a05f5f63f5fe28bc4f225
- https://git.kernel.org/stable/c/39509d76a9a3d02f379d52cb4b1449469c56c0e0
- https://git.kernel.org/stable/c/1c743127cc54b112b155f434756bd4b5fa565a99
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.83
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.6
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.163