CVE-2022-49907

net: mdio: fix undefined behavior in bit shift for __mdiobus_register

State: Published
Severity: Not scored
Published: May 1, 2025
Updated: May 11, 2026
Reserved: May 1, 2025

Description

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>

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	4fd5f812c23c7deee6425f4a318e85c317cd1d6c to before 20ed01a7b9af6e6a3c33761eebbb710ea6dd49b7Affected 4fd5f812c23c7deee6425f4a318e85c317cd1d6c to before 7006176a3c863e3e353ce1b8a349ef5bb1b9320eAffected 4fd5f812c23c7deee6425f4a318e85c317cd1d6c to before a3fafc974be37319679f36dc4e7cca7db1e02973Affected 4fd5f812c23c7deee6425f4a318e85c317cd1d6c to before 4954b5359eb141499492fadfab891e28905509e2Affected 4fd5f812c23c7deee6425f4a318e85c317cd1d6c to before 634f066d02bdb22a26da7deb0c7617ab1a65fc9dAffected 4fd5f812c23c7deee6425f4a318e85c317cd1d6c to before 985a88bf0b27193522bba7856b1763f428cef19dAffected 4fd5f812c23c7deee6425f4a318e85c317cd1d6c to before 6ce6f8f8f6316da6f92afe7490bc2f0b654d68e0Affected 4fd5f812c23c7deee6425f4a318e85c317cd1d6c to before 40e4eb324c59e11fcb927aa46742d28aba6ecb8aAffected
LinuxLinux	2.6.28Affected before 2.6.28Not affected 4.9.333 through 4.9.Not affected 4.14.299 through 4.14.Not affected 4.19.265 through 4.19.Not affected 5.4.224 through 5.4.Not affected 5.10.154 through 5.10.Not affected 5.15.78 through 5.15.Not affected 6.0.8 through 6.0.*Not affected 6.1 and laterNot affected

Product

Versions

LinuxLinux

4fd5f812c23c7deee6425f4a318e85c317cd1d6c to before 20ed01a7b9af6e6a3c33761eebbb710ea6dd49b7Affected
4fd5f812c23c7deee6425f4a318e85c317cd1d6c to before 7006176a3c863e3e353ce1b8a349ef5bb1b9320eAffected
4fd5f812c23c7deee6425f4a318e85c317cd1d6c to before a3fafc974be37319679f36dc4e7cca7db1e02973Affected
4fd5f812c23c7deee6425f4a318e85c317cd1d6c to before 4954b5359eb141499492fadfab891e28905509e2Affected
4fd5f812c23c7deee6425f4a318e85c317cd1d6c to before 634f066d02bdb22a26da7deb0c7617ab1a65fc9dAffected
4fd5f812c23c7deee6425f4a318e85c317cd1d6c to before 985a88bf0b27193522bba7856b1763f428cef19dAffected
4fd5f812c23c7deee6425f4a318e85c317cd1d6c to before 6ce6f8f8f6316da6f92afe7490bc2f0b654d68e0Affected
4fd5f812c23c7deee6425f4a318e85c317cd1d6c to before 40e4eb324c59e11fcb927aa46742d28aba6ecb8aAffected

LinuxLinux

2.6.28Affected
before 2.6.28Not affected
4.9.333 through 4.9.*Not affected
4.14.299 through 4.14.*Not affected
4.19.265 through 4.19.*Not affected
5.4.224 through 5.4.*Not affected
5.10.154 through 5.10.*Not affected
5.15.78 through 5.15.*Not affected
6.0.8 through 6.0.*Not affected
6.1 and laterNot affected

References

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