Monitor vulnerabilities like this one.
Sign up free to get alerted when software you use is affected.
Linux Wi-Fi Driver Crashes on Some Systems Due to Misaligned Data
CVE-2025-71229
Summary
A bug in the Linux Wi-Fi driver can cause a system crash on some devices. This happens when the driver tries to read data from an address that is not properly aligned. To fix this issue, the driver has been updated to perform 1-byte reads instead of 4-byte reads. Affected users should update their Linux kernel to the latest version to prevent potential crashes.
Original title
In the Linux kernel, the following vulnerability has been resolved:
wifi: rtw88: Fix alignment fault in rtw_core_enable_beacon()
rtw_core_enable_beacon() reads 4 bytes from an address that is not...
Original description
In the Linux kernel, the following vulnerability has been resolved:
wifi: rtw88: Fix alignment fault in rtw_core_enable_beacon()
rtw_core_enable_beacon() reads 4 bytes from an address that is not a
multiple of 4. This results in a crash on some systems.
Do 1 byte reads/writes instead.
Unable to handle kernel paging request at virtual address ffff8000827e0522
Mem abort info:
ESR = 0x0000000096000021
EC = 0x25: DABT (current EL), IL = 32 bits
SET = 0, FnV = 0
EA = 0, S1PTW = 0
FSC = 0x21: alignment fault
Data abort info:
ISV = 0, ISS = 0x00000021, ISS2 = 0x00000000
CM = 0, WnR = 0, TnD = 0, TagAccess = 0
GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
swapper pgtable: 4k pages, 48-bit VAs, pgdp=0000000005492000
[ffff8000827e0522] pgd=0000000000000000, p4d=10000001021d9403, pud=10000001021da403, pmd=100000011061c403, pte=00780000f3200f13
Internal error: Oops: 0000000096000021 [#1] SMP
Modules linked in: [...] rtw88_8822ce rtw88_8822c rtw88_pci rtw88_core [...]
CPU: 0 UID: 0 PID: 73 Comm: kworker/u32:2 Tainted: G W 6.17.9 #1-NixOS VOLUNTARY
Tainted: [W]=WARN
Hardware name: FriendlyElec NanoPC-T6 LTS (DT)
Workqueue: phy0 rtw_c2h_work [rtw88_core]
pstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : rtw_pci_read32+0x18/0x40 [rtw88_pci]
lr : rtw_core_enable_beacon+0xe0/0x148 [rtw88_core]
sp : ffff800080cc3ca0
x29: ffff800080cc3ca0 x28: ffff0001031fc240 x27: ffff000102100828
x26: ffffd2cb7c9b4088 x25: ffff0001031fc2c0 x24: ffff000112fdef00
x23: ffff000112fdef18 x22: ffff000111c29970 x21: 0000000000000001
x20: 0000000000000001 x19: ffff000111c22040 x18: 0000000000000000
x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000
x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000000000 x10: 0000000000000000 x9 : ffffd2cb6507c090
x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000
x2 : 0000000000007f10 x1 : 0000000000000522 x0 : ffff8000827e0522
Call trace:
rtw_pci_read32+0x18/0x40 [rtw88_pci] (P)
rtw_hw_scan_chan_switch+0x124/0x1a8 [rtw88_core]
rtw_fw_c2h_cmd_handle+0x254/0x290 [rtw88_core]
rtw_c2h_work+0x50/0x98 [rtw88_core]
process_one_work+0x178/0x3f8
worker_thread+0x208/0x418
kthread+0x120/0x220
ret_from_fork+0x10/0x20
Code: d28fe202 8b020000 f9524400 8b214000 (b9400000)
---[ end trace 0000000000000000 ]---
wifi: rtw88: Fix alignment fault in rtw_core_enable_beacon()
rtw_core_enable_beacon() reads 4 bytes from an address that is not a
multiple of 4. This results in a crash on some systems.
Do 1 byte reads/writes instead.
Unable to handle kernel paging request at virtual address ffff8000827e0522
Mem abort info:
ESR = 0x0000000096000021
EC = 0x25: DABT (current EL), IL = 32 bits
SET = 0, FnV = 0
EA = 0, S1PTW = 0
FSC = 0x21: alignment fault
Data abort info:
ISV = 0, ISS = 0x00000021, ISS2 = 0x00000000
CM = 0, WnR = 0, TnD = 0, TagAccess = 0
GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
swapper pgtable: 4k pages, 48-bit VAs, pgdp=0000000005492000
[ffff8000827e0522] pgd=0000000000000000, p4d=10000001021d9403, pud=10000001021da403, pmd=100000011061c403, pte=00780000f3200f13
Internal error: Oops: 0000000096000021 [#1] SMP
Modules linked in: [...] rtw88_8822ce rtw88_8822c rtw88_pci rtw88_core [...]
CPU: 0 UID: 0 PID: 73 Comm: kworker/u32:2 Tainted: G W 6.17.9 #1-NixOS VOLUNTARY
Tainted: [W]=WARN
Hardware name: FriendlyElec NanoPC-T6 LTS (DT)
Workqueue: phy0 rtw_c2h_work [rtw88_core]
pstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : rtw_pci_read32+0x18/0x40 [rtw88_pci]
lr : rtw_core_enable_beacon+0xe0/0x148 [rtw88_core]
sp : ffff800080cc3ca0
x29: ffff800080cc3ca0 x28: ffff0001031fc240 x27: ffff000102100828
x26: ffffd2cb7c9b4088 x25: ffff0001031fc2c0 x24: ffff000112fdef00
x23: ffff000112fdef18 x22: ffff000111c29970 x21: 0000000000000001
x20: 0000000000000001 x19: ffff000111c22040 x18: 0000000000000000
x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000
x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000000000 x10: 0000000000000000 x9 : ffffd2cb6507c090
x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000
x2 : 0000000000007f10 x1 : 0000000000000522 x0 : ffff8000827e0522
Call trace:
rtw_pci_read32+0x18/0x40 [rtw88_pci] (P)
rtw_hw_scan_chan_switch+0x124/0x1a8 [rtw88_core]
rtw_fw_c2h_cmd_handle+0x254/0x290 [rtw88_core]
rtw_c2h_work+0x50/0x98 [rtw88_core]
process_one_work+0x178/0x3f8
worker_thread+0x208/0x418
kthread+0x120/0x220
ret_from_fork+0x10/0x20
Code: d28fe202 8b020000 f9524400 8b214000 (b9400000)
---[ end trace 0000000000000000 ]---
- https://git.kernel.org/stable/c/0177aa828d966117ea30a44f2e1890fdb356118e
- https://git.kernel.org/stable/c/13394550441557115bb74f6de9778c165755a7ab
- https://git.kernel.org/stable/c/653f8b6a091538b084715f259900f62c2ec1c6cf
- https://git.kernel.org/stable/c/71dee092903adb496fe1f357b267d94087b679e0
- https://git.kernel.org/stable/c/7d31dde1bd8678115329e46dc8d7afb63c176b74
Published: 18 Feb 2026 · Updated: 11 Mar 2026 · First seen: 6 Mar 2026