SB2024062055 - NULL pointer dereference in Linux kernel mptcp
Published: June 20, 2024 Updated: May 13, 2025
Security Bulletin ID
SB2024062055
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-2021-47593)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the mptcp_accept() function in net/mptcp/protocol.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/451f1eded7f56e93aaf52eb547ba97742d9c0e97
- https://git.kernel.org/stable/c/c26ac0ea3a91c210cf90452e625dc441adf3e549
- https://git.kernel.org/stable/c/d6692b3b97bdc165d150f4c1505751a323a80717
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.88
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.11
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16