SB2026092541 - Integer overflow in Linux kernel exfat
Published: September 25, 2026
Security Bulletin ID
SB2026092541
CSH 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 vulnerability.
1) Integer overflow (CVE-ID: CVE-2026-93828)
CWE-ID: CWE-190 - Integer overflow
CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to an integer overflow in exfat_create_upcase_table() when processing an exFAT volume with an upcase table size of zero. A remote attacker can cause the kernel to process such a volume to trigger an infinite loop.
Remediation
Install update from vendor's website.