CVE-2026-63985

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A flaw exists in the ethtool EEPROM Netlink fallback path within the fallback set params() function. While the function validates that the offset is less than eeprom len, it fails to verify that the sum of offset and length remains within the eeprom len boundary. This inconsistency differs from the ethtool get any eeprom() function in ioctl.c, which enforces both bounds. This lack of validation could cause unexpected behavior in drivers and device firmware. Additionally, the eeprom fallback() function used kmalloc() instead of zalloc, which failed to zero-initialize buffers passed to drivers.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.