Vulnerability in Linux
CVE-2025-39771
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.
EPSS: 0.001 (2.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Linux — versions 6157e62b07d9331cc1d4d9d525dab33d45b0e83c, 6.16, 0
- Linux Linux_kernel — versions 6.17
References
Frequently asked questions
- What is CVE-2025-39771?
- CVE-2025-39771 is a medium-severity vulnerability in Linux. CVSS score: 5.5/10. Published 2025-09-11.
- How severe is CVE-2025-39771?
- Medium severity. CVSS v3 base score is 5.5 out of 10.