IT

Tracker / CVE-2022-49907

CVE-2022-49907

High 7.8

In the Linux kernel, the following vulnerability has been resolved: net: mdio: fix undefined behavior in bit shift for __mdiobus_register Shifting signed 32-bit value by 31 bits is undefined, so changing significant bit to unsigned. The UBSAN warning calltrace like below: UBSAN: shift-out-of-bounds in drivers/net/phy/mdio_bus.c:586:27 left shift of 1 by 31 places cannot be represented in type 'int' Call Trace: <TASK> dump_stack_lvl+0x7d/0xa5 dump_stack+0x15/0x1b ubsan_epilogue+0xe/0x4e __ubsan_handle_shift_out_of_bounds+0x1e7/0x20c __mdiobus_register+0x49d/0x4e0 fixed_mdio_bus_init+0xd8/0x12d do_one_initcall+0x76/0x430 kernel_init_freeable+0x3b3/0x422 kernel_init+0x24/0x1e0 ret_from_fork+0x1f/0x30 </TASK>

Affected products and versions

linux linux_kernel
linux linux_kernel · 2.6.28 → 4.9.333
linux linux_kernel · 4.10 → 4.14.299
linux linux_kernel · 4.15 → 4.19.265
linux linux_kernel · 4.20 → 5.4.224
linux linux_kernel · 5.11 → 5.15.78
linux linux_kernel · 5.16 → 6.0.8
linux linux_kernel · 5.5 → 5.10.154

Analysis

This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.

References