SB2023100558 - NULL pointer dereference in Linux kernel ksmbd
Published: October 5, 2023
Security Bulletin ID
SB2023100558
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote 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-2023-3866)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error within the void __handle_ksmbd_work() function in fs/smb/server/server.c when handling chained requests. A remote attacker can send specially crafted data to the ksmbd and perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.