SB20260113113 - Integer underflow in Linux kernel iomap
Published: January 13, 2026
Security Bulletin ID
SB20260113113
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Integer underflow (CVE-ID: CVE-2025-68794)
CWE-ID: CWE-191 - Integer underflow
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to execute arbitrary code.
The vulnerability exists due to integer underflow within the iomap_adjust_read_range() function in fs/iomap/buffered-io.c. A local user can execute arbitrary code.
Remediation
Install update from vendor's website.