CVE-2022-49471: rtw89: cfo: check mac_id to avoid out-of-bounds
First published: Wed Feb 26 2025(Updated: )
In the Linux kernel, the following vulnerability has been resolved: rtw89: cfo: check mac_id to avoid out-of-bounds Somehow, hardware reports incorrect mac_id and pollute memory. Check index before we access the array. UBSAN: array-index-out-of-bounds in rtw89/phy.c:2517:23 index 188 is out of range for type 's32 [64]' CPU: 1 PID: 51550 Comm: irq/35-rtw89_pc Tainted: G OE Call Trace: <IRQ> show_stack+0x52/0x58 dump_stack_lvl+0x4c/0x63 dump_stack+0x10/0x12 ubsan_epilogue+0x9/0x45 __ubsan_handle_out_of_bounds.cold+0x44/0x49 ? __alloc_skb+0x92/0x1d0 rtw89_phy_cfo_parse+0x44/0x7f [rtw89_core] rtw89_core_rx+0x261/0x871 [rtw89_core] ? __alloc_skb+0xee/0x1d0 rtw89_pci_napi_poll+0x3fa/0x4ea [rtw89_pci] __napi_poll+0x33/0x1a0 net_rx_action+0x126/0x260 ? __queue_work+0x217/0x4c0 __do_softirq+0xd9/0x315 ? disable_irq_nosync+0x10/0x10 do_softirq.part.0+0x6d/0x90 </IRQ> <TASK> __local_bh_enable_ip+0x62/0x70 rtw89_pci_interrupt_threadfn+0x182/0x1a6 [rtw89_pci] irq_thread_fn+0x28/0x60 irq_thread+0xc8/0x190 ? irq_thread_fn+0x60/0x60 kthread+0x16b/0x190 ? irq_thread_check_affinity+0xe0/0xe0 ? set_kthread_struct+0x50/0x50 ret_from_fork+0x22/0x30 </TASK>
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | ||
| Linux Kernel | <5.17.14 | |
| Linux Kernel | >=5.18<5.18.3 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2022-49471?
CVE-2022-49471 has a severity rating that affects the functionality and security of the Linux kernel's handling of certain hardware reporting.
How do I fix CVE-2022-49471?
To fix CVE-2022-49471, update the Linux kernel to a version that includes the patch for this vulnerability, specifically versions later than 5.18.3.
What platforms are affected by CVE-2022-49471?
CVE-2022-49471 affects the Linux kernel versions up to and including 5.17.14 and between 5.18 and 5.18.3.
What are the potential consequences of CVE-2022-49471?
If exploited, CVE-2022-49471 could lead to out-of-bounds memory access, resulting in potential system crashes or data corruption.
What components of the Linux kernel are impacted by CVE-2022-49471?
CVE-2022-49471 impacts the rtw89 driver component of the Linux kernel, particularly its handling of MAC IDs.
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