CVE-2025-38647
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-08-22

Last updated on: 2025-12-15

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: wifi: rtw89: sar: drop lockdep assertion in rtw89_set_sar_from_acpi The following assertion is triggered on the rtw89 driver startup. It looks meaningless to hold wiphy lock on the early init stage so drop the assertion. WARNING: CPU: 7 PID: 629 at drivers/net/wireless/realtek/rtw89/sar.c:502 rtw89_set_sar_from_acpi+0x365/0x4d0 [rtw89_core] CPU: 7 UID: 0 PID: 629 Comm: (udev-worker) Not tainted 6.15.0+ #29 PREEMPT(lazy) Hardware name: LENOVO 21D0/LNVNB161216, BIOS J6CN50WW 09/27/2024 RIP: 0010:rtw89_set_sar_from_acpi+0x365/0x4d0 [rtw89_core] Call Trace: <TASK> rtw89_sar_init+0x68/0x2c0 [rtw89_core] rtw89_core_init+0x188e/0x1e50 [rtw89_core] rtw89_pci_probe+0x530/0xb50 [rtw89_pci] local_pci_probe+0xd9/0x190 pci_call_probe+0x183/0x540 pci_device_probe+0x171/0x2c0 really_probe+0x1e1/0x890 __driver_probe_device+0x18c/0x390 driver_probe_device+0x4a/0x120 __driver_attach+0x1a0/0x530 bus_for_each_dev+0x10b/0x190 bus_add_driver+0x2eb/0x540 driver_register+0x1a3/0x3a0 do_one_initcall+0xd5/0x450 do_init_module+0x2cc/0x8f0 init_module_from_file+0xe1/0x150 idempotent_init_module+0x226/0x760 __x64_sys_finit_module+0xcd/0x150 do_syscall_64+0x94/0x380 entry_SYSCALL_64_after_hwframe+0x76/0x7e Found by Linux Verification Center (linuxtesting.org).
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Meta Information
Published
2025-08-22
Last Modified
2025-12-15
Generated
2026-05-07
AI Q&A
2025-08-22
EPSS Evaluated
2026-05-05
NVD
CVE-2025-38647
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel 6.16
Helpful Resources
Exploitability
CWE
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CWE ID Description
CWE-NVD-CWE-noinfo
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AI Powered Q&A
Can you explain this vulnerability to me?

This vulnerability involves an assertion failure in the Linux kernel's rtw89 wireless driver related to SAR (Specific Absorption Rate) settings from ACPI. The assertion triggers during the driver's startup because it incorrectly holds a wiphy lock at an early initialization stage, which is unnecessary. The fix drops this assertion to prevent the warning and potential issues during driver initialization.


How can this vulnerability impact me? :

The impact of this vulnerability is primarily related to stability and reliability of the rtw89 wireless driver during startup. The assertion failure could cause warnings or interruptions in the driver initialization process, potentially affecting wireless functionality on affected systems. However, it does not indicate a direct security breach or data compromise.


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