SB20260720232 - Improper control of a resource through its lifetime in Linux kernel ethtool
Published: July 20, 2026
Security Bulletin ID
SB20260720232
CSH 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 vulnerability.
1) Improper control of a resource through its lifetime (CVE-ID: CVE-2026-63997)
CWE-ID: CWE-664 - Improper control of a resource through its lifetime
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper state management in module_flash_fw_schedule() in net/ethtool/module.c when handling module firmware flash errors. A local user can trigger an error during a firmware flash operation to cause a denial of service.
Remediation
Install update from vendor's website.