CVE-2025-21795
High
Description
In the Linux kernel, the following vulnerability has been resolved: NFSD: fix hang in nfsd4_shutdown_callback If nfs4_client is in courtesy state then there is no point to send the callback. This causes nfsd4_shutdown_callback to hang since cl_cb_inflight is not 0. This hang lasts about 15 minutes until TCP notifies NFSD that the connection was dropped. This patch modifies nfsd4_run_cb_work to skip the RPC call if nfs4_client is in courtesy state.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Linux Kernel
PublishedFeb 27, 2025
First seenFeb 27, 2025
How to fix
Update
- linux linux_kernel5.10.235, 5.15.179, 6.1.129, 6.6.79, 6.12.16, 6.13.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.10.220 ≤ v < 5.10.235, 5.15.154 ≤ v < 5.15.179, 5.19 ≤ v < 6.1.129, 6.2 ≤ v < 6.6.79, 6.7 ≤ v < 6.12.16, 6.13 ≤ v < 6.13.4, 6.14 | 5.10.235, 5.15.179, 6.1.129, 6.6.79, 6.12.16, 6.13.4 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.