Answer in brief
CVE-2022-49907 records a High severity (CVSS 7.8) vulnerability in net: mdio: fix undefined behavior in bit shift for __mdiobus_register. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=4fd5f812c23c7deee6425f4a318e85c317cd1d6c <20ed01a7b9af6e6a3c33761eebbb710ea6dd49b7 || >=4fd5f812c23c7deee6425f4a318e85c317cd1d6c <7006176a3c863e3e353ce1b8a349ef5bb1b9320e || >=4fd5f812c23c7deee6425f4a318e85c317cd1d6c <a3fafc974be37319679f36dc4e7cca7db1e02973 || >=4fd5f812c23c7deee6425f4a318e85c317cd1d6c <4954b5359eb141499492fadfab891e28905509e2 || >=4fd5f812c23c7deee6425f4a318e85c317cd1d6c <634f066d02bdb22a26da7deb0c7617ab1a65fc9d || >=4fd5f812c23c7deee6425f4a318e85c317cd1d6c <985a88bf0b27193522bba7856b1763f428cef19d || >=4fd5f812c23c7deee6425f4a318e85c317cd1d6c <6ce6f8f8f6316da6f92afe7490bc2f0b654d68e0 || >=4fd5f812c23c7deee6425f4a318e85c317cd1d6c <40e4eb324c59e11fcb927aa46742d28aba6ecb8a | 20ed01a7b9af6e6a3c33761eebbb710ea6dd49b7, 7006176a3c863e3e353ce1b8a349ef5bb1b9320e, a3fafc974be37319679f36dc4e7cca7db1e02973, 4954b5359eb141499492fadfab891e28905509e2, 634f066d02bdb22a26da7deb0c7617ab1a65fc9d, 985a88bf0b27193522bba7856b1763f428cef19d, 6ce6f8f8f6316da6f92afe7490bc2f0b654d68e0, 40e4eb324c59e11fcb927aa46742d28aba6ecb8a |
| Linux/Linuxgeneric | 2.6.28 | Not reported |
Published upstream
May 1, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 5, 2026
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>
Quoted source text, attributed separately from HOL analysis.