Linux · Linux Kernel · CVE-2025-21801
**Name of the Vulnerable Software and Affected Versions**
Linux kernel versions prior to 6.13.0-rc7-next-20250116-arm64-renesas-00002-g35245dfdc62c
**Description**
A vulnerability in the Linux kernel has been resolved, specifically in the ravb driver. The issue was related to missing rtnl lock in the suspend/resume path, which could lead to conflicts with ongoing ndo operations. Without the fix, a warning about suspicious RCU usage is triggered. The vulnerability affects the ravb open, ravb close, and wol operations, which must be performed under the rtnl lock.
**Recommendations**
To resolve the issue, update to a version of the Linux kernel that includes the fix for the missing rtnl lock in the suspend/resume path.
As a temporary workaround, consider ensuring that calls to ravb open, ravb close, and wol operations are performed under the rtnl lock to prevent conflicts with ongoing ndo operations.