CVE-2022-49907
net: mdio: fix undefined behavior in bit shift for __mdiobus_register
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>
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| Linux Linux |
≥ 4fd5f812c23c7deee6425f4a318e85c317cd1d6c; < 20ed01a7b9af6e6a3c33761eebbb710ea6dd49b7 (affected, git) ≥ 4fd5f812c23c7deee6425f4a318e85c317cd1d6c; < 7006176a3c863e3e353ce1b8a349ef5bb1b9320e (affected, git) ≥ 4fd5f812c23c7deee6425f4a318e85c317cd1d6c; < a3fafc974be37319679f36dc4e7cca7db1e02973 (affected, git) ≥ 4fd5f812c23c7deee6425f4a318e85c317cd1d6c; < 4954b5359eb141499492fadfab891e28905509e2 (affected, git) ≥ 4fd5f812c23c7deee6425f4a318e85c317cd1d6c; < 634f066d02bdb22a26da7deb0c7617ab1a65fc9d (affected, git) ≥ 4fd5f812c23c7deee6425f4a318e85c317cd1d6c; < 985a88bf0b27193522bba7856b1763f428cef19d (affected, git) ≥ 4fd5f812c23c7deee6425f4a318e85c317cd1d6c; < 6ce6f8f8f6316da6f92afe7490bc2f0b654d68e0 (affected, git) ≥ 4fd5f812c23c7deee6425f4a318e85c317cd1d6c; < 40e4eb324c59e11fcb927aa46742d28aba6ecb8a (affected, git) Other versions: unaffected |
CNA: Linux |
| Linux Linux |
2.6.28 (affected) ≥ 0; < 2.6.28 (unaffected, semver) ≥ 4.9.333; ≤ 4.9.* (unaffected, semver) ≥ 4.14.299; ≤ 4.14.* (unaffected, semver) ≥ 4.19.265; ≤ 4.19.* (unaffected, semver) ≥ 5.4.224; ≤ 5.4.* (unaffected, semver) ≥ 5.10.154; ≤ 5.10.* (unaffected, semver) ≥ 5.15.78; ≤ 5.15.* (unaffected, semver) ≥ 6.0.8; ≤ 6.0.* (unaffected, semver) ≥ 6.1; ≤ * (unaffected, original_commit_for_fix) Other versions: affected |
CNA: Linux |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
No CVSS assessment reported. An unscored record is not a low-severity determination.
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://git.kernel.org/stable/c/20ed01a7b9af6e6a3c33761eebbb710ea6dd49b7CNA: Linux
- https://git.kernel.org/stable/c/7006176a3c863e3e353ce1b8a349ef5bb1b9320eCNA: Linux
- https://git.kernel.org/stable/c/a3fafc974be37319679f36dc4e7cca7db1e02973CNA: Linux
- https://git.kernel.org/stable/c/4954b5359eb141499492fadfab891e28905509e2CNA: Linux
- https://git.kernel.org/stable/c/634f066d02bdb22a26da7deb0c7617ab1a65fc9dCNA: Linux
- https://git.kernel.org/stable/c/985a88bf0b27193522bba7856b1763f428cef19dCNA: Linux
- https://git.kernel.org/stable/c/6ce6f8f8f6316da6f92afe7490bc2f0b654d68e0CNA: Linux
- https://git.kernel.org/stable/c/40e4eb324c59e11fcb927aa46742d28aba6ecb8aCNA: Linux
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