SB20251208127 - Buffer overflow in Linux kernel exfat
Published: December 8, 2025
Security Bulletin ID
SB20251208127
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) Buffer overflow (CVE-ID: CVE-2025-40307)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to memory corruption within the exfat_allocate_bitmap() function in fs/exfat/balloc.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.