Linux · Linux Kernel · CVE-2025-21795
**Name of the Vulnerable Software and Affected Versions**
Linux kernel (affected versions not specified)
**Description**
A hang issue in the Linux kernel's NFSD has been resolved. The problem occurs when `nfs4 client` is in a courtesy state, causing `nfsd4 shutdown callback` to hang because `cl cb inflight` is not 0. This hang lasts approximately 15 minutes until TCP notifies NFSD that the connection was dropped. The issue is related to the `nfsd4 run cb work` function and the RPC call.
**Recommendations**
At the moment, there is no information about a newer version that contains a fix for this vulnerability.