CVE-2022-49907
net: mdio: fix undefined behavior in bit shift for __mdiobus_register
- Published
- Updated
- Reserved
- Assigned by
- Linux
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
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.23% · top 86% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 4fd5f812c23c7deee6425f4a318e85c317cd1d6c – < 20ed01a7b9af6e6a3c33761eebbb710ea6dd49b7
- affected 4fd5f812c23c7deee6425f4a318e85c317cd1d6c – < 7006176a3c863e3e353ce1b8a349ef5bb1b9320e
- affected 4fd5f812c23c7deee6425f4a318e85c317cd1d6c – < a3fafc974be37319679f36dc4e7cca7db1e02973
- affected 4fd5f812c23c7deee6425f4a318e85c317cd1d6c – < 4954b5359eb141499492fadfab891e28905509e2
- affected 4fd5f812c23c7deee6425f4a318e85c317cd1d6c – < 634f066d02bdb22a26da7deb0c7617ab1a65fc9d
- affected 4fd5f812c23c7deee6425f4a318e85c317cd1d6c – < 985a88bf0b27193522bba7856b1763f428cef19d
- affected 4fd5f812c23c7deee6425f4a318e85c317cd1d6c – < 6ce6f8f8f6316da6f92afe7490bc2f0b654d68e0
- affected 4fd5f812c23c7deee6425f4a318e85c317cd1d6c – < 40e4eb324c59e11fcb927aa46742d28aba6ecb8a
- affected 2.6.28
- unaffected < 2.6.28
- unaffected 4.9.333 – ≤ 4.9.*
- unaffected 4.14.299 – ≤ 4.14.*
- unaffected 4.19.265 – ≤ 4.19.*
- unaffected 5.4.224 – ≤ 5.4.*
- unaffected 5.10.154 – ≤ 5.10.*
- unaffected 5.15.78 – ≤ 5.15.*
- unaffected 6.0.8 – ≤ 6.0.*
- unaffected 6.1 – ≤ *
References (8)
- https://git.kernel.org/stable/c/20ed01a7b9af6e6a3c33761eebbb710ea6dd49b7 (opens in a new tab)
- https://git.kernel.org/stable/c/7006176a3c863e3e353ce1b8a349ef5bb1b9320e (opens in a new tab)
- https://git.kernel.org/stable/c/a3fafc974be37319679f36dc4e7cca7db1e02973 (opens in a new tab)
- https://git.kernel.org/stable/c/4954b5359eb141499492fadfab891e28905509e2 (opens in a new tab)
- https://git.kernel.org/stable/c/634f066d02bdb22a26da7deb0c7617ab1a65fc9d (opens in a new tab)
- https://git.kernel.org/stable/c/985a88bf0b27193522bba7856b1763f428cef19d (opens in a new tab)
- https://git.kernel.org/stable/c/6ce6f8f8f6316da6f92afe7490bc2f0b654d68e0 (opens in a new tab)
- https://git.kernel.org/stable/c/40e4eb324c59e11fcb927aa46742d28aba6ecb8a (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://trackcve.app/cve/CVE-2022-49907)Record last updated .