CVE-2022-49471: rtw89: cfo: check mac_id to avoid out-of-bounds
In the Linux kernel, the following vulnerability has been resolved:
rtw89: cfo: check macid to avoid out-of-bounds
Somehow, hardware reports incorrect macid 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-rtw89pc Tainted: G OE Call Trace: <IRQ> showstack+0x52/0x58 dumpstacklvl+0x4c/0x63 dumpstack+0x10/0x12 ubsanepilogue+0x9/0x45 ubsanhandleoutofbounds.cold+0x44/0x49 ? allocskb+0x92/0x1d0 rtw89phycfoparse+0x44/0x7f [rtw89core] rtw89corerx+0x261/0x871 [rtw89core] ? allocskb+0xee/0x1d0 rtw89pcinapipoll+0x3fa/0x4ea [rtw89pci] napipoll+0x33/0x1a0 netrxaction+0x126/0x260 ? queuework+0x217/0x4c0 dosoftirq+0xd9/0x315 ? disableirqnosync+0x10/0x10 dosoftirq.part.0+0x6d/0x90 </IRQ> <TASK> localbhenableip+0x62/0x70 rtw89pciinterruptthreadfn+0x182/0x1a6 [rtw89pci] irqthreadfn+0x28/0x60 irqthread+0xc8/0x190 ? irqthreadfn+0x60/0x60 kthread+0x16b/0x190 ? irqthreadcheckaffinity+0xe0/0xe0 ? setkthreadstruct+0x50/0x50 retfromfork+0x22/0x30 </TASK>
Affected Software
Event History
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.