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).
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Linux | 6.16 | 6.16.1 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-intel +8 | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +32 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +28 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp +14 | No fix yet | — |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
Advisories 1
- WID-SEC-2025-1898 Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service und Privilegieneskalation BSI CERT-Bund (WID) · Nov 12, 2026