# CVE-2025-37802: ksmbd: fix WARNING "do not call blocking ops when !TASK_RUNNING"

CVE-2025-37802 is fixed in linux on 1 platform, first by DEBIAN-CVE-2025-37802, released May 8, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2025-37802
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0036
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 8, 2025
- Weakness: Improper Locking
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-37802

## Description

In the Linux kernel, the following vulnerability has been resolved:  ksmbd: fix WARNING "do not call blocking ops when !TASK_RUNNING"  wait_event_timeout() will set the state of the current task to TASK_UNINTERRUPTIBLE, before doing the condition check. This means that ksmbd_durable_scavenger_alive() will try to acquire the mutex while already in a sleeping state. The scheduler warns us by giving the following warning:  do not call blocking ops when !TASK_RUNNING; state=2 set at  [<0000000061515a6f>] prepare_to_wait_event+0x9f/0x6c0 WARNING: CPU: 2 PID: 4147 at kernel/sched/core.c:10099 __might_sleep+0x12f/0x160  mutex lock is not needed in ksmbd_durable_scavenger_alive().

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.12.27-1 | [DEBIAN-CVE-2025-37802](https://patchblox.com/security/data/fix/linux/debian-cve-2025-37802.md) | May 8, 2025 |
| Linux | linux Debian 14 | 6.12.27-1 | [DEBIAN-CVE-2025-37802](https://patchblox.com/security/data/fix/linux/debian-cve-2025-37802.md) | May 8, 2025 |

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