# CVE-2025-39771: linux: In the Linux kernel, the following vulnerability has been resolved:  regulator: pca9450: Use devm_register_sys_off_ha...

CVE-2025-39771 is fixed in linux on 1 platform by DEBIAN-CVE-2025-39771 (version 6.16.5-1), released September 11, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2025-39771
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0013
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 11, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  regulator: pca9450: Use devm_register_sys_off_handler  With module test, there is error dump: ------------[ cut here ]------------   notifier callback pca9450_i2c_restart_handler already registered   WARNING: kernel/notifier.c:23 at notifier_chain_register+0x5c/0x88,   CPU#0: kworker/u16:3/50   Call trace:   notifier_chain_register+0x5c/0x88 (P)   atomic_notifier_chain_register+0x30/0x58   register_restart_handler+0x1c/0x28   pca9450_i2c_probe+0x418/0x538   i2c_device_probe+0x220/0x3d0   really_probe+0x114/0x410   __driver_probe_device+0xa0/0x150   driver_probe_device+0x40/0x114   __device_attach_driver+0xd4/0x12c  So use devm_register_sys_off_handler to let kernel handle the resource free to avoid kernel dump.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 6.16.5-1 | [DEBIAN-CVE-2025-39771](https://patchblox.com/security/data/fix/linux/debian-cve-2025-39771.md) | Sep 11, 2025 |

---

Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.