CVE-2026-63997
kernel: ethtool: module: avoid leaking a netdev ref on module flash errors
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · July 19, 2026
Updated · October 29, 2026
Description
A flaw was found in the ethtool module of the Linux kernel. The module_flash_fw_schedule() function fails to properly undo the setting of the 'in_progress' flag and the taking of the netdev reference during module flash errors. This oversight can lead to a resource leak, preventing the device from being properly released while the rtnl_lock is held, potentially causing a denial of service.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-772 · Missing Release of Resource after Effective Lifetime