{"id":"CVE-2022-49907","title":"net: mdio: fix undefined behavior in bit shift for __mdiobus_register","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mdio: fix undefined behavior in bit shift for __mdiobus_register\n\nShifting signed 32-bit value by 31 bits is undefined, so changing\nsignificant bit to unsigned. Th…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 4fd5f812c23c7deee6425f4a318e85c317cd1d6c < 20ed01a7b9af6e6a3c33761eebbb710ea6dd49b7","Linux >= 4fd5f812c23c7deee6425f4a318e85c317cd1d6c < 7006176a3c863e3e353ce1b8a349ef5bb1b9320e","Linux >= 4fd5f812c23c7deee6425f4a318e85c317cd1d6c < a3fafc974be37319679f36dc4e7cca7db1e02973","Linux >= 4fd5f812c23c7deee6425f4a318e85c317cd1d6c < 4954b5359eb141499492fadfab891e28905509e2","Linux >= 4fd5f812c23c7deee6425f4a318e85c317cd1d6c < 634f066d02bdb22a26da7deb0c7617ab1a65fc9d","Linux >= 4fd5f812c23c7deee6425f4a318e85c317cd1d6c < 985a88bf0b27193522bba7856b1763f428cef19d","Linux >= 4fd5f812c23c7deee6425f4a318e85c317cd1d6c < 6ce6f8f8f6316da6f92afe7490bc2f0b654d68e0","Linux >= 4fd5f812c23c7deee6425f4a318e85c317cd1d6c < 40e4eb324c59e11fcb927aa46742d28aba6ecb8a","Linux 2.6.28"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T19:51:22.278697Z"},"published":"2025-05-01","updated":"2026-11-05","sourceUpdated":"2026-11-05T20:00:11.220Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2022-49907","references":[{"url":"https://git.kernel.org/stable/c/20ed01a7b9af6e6a3c33761eebbb710ea6dd49b7"},{"url":"https://git.kernel.org/stable/c/7006176a3c863e3e353ce1b8a349ef5bb1b9320e"},{"url":"https://git.kernel.org/stable/c/a3fafc974be37319679f36dc4e7cca7db1e02973"},{"url":"https://git.kernel.org/stable/c/4954b5359eb141499492fadfab891e28905509e2"},{"url":"https://git.kernel.org/stable/c/634f066d02bdb22a26da7deb0c7617ab1a65fc9d"},{"url":"https://git.kernel.org/stable/c/985a88bf0b27193522bba7856b1763f428cef19d"},{"url":"https://git.kernel.org/stable/c/6ce6f8f8f6316da6f92afe7490bc2f0b654d68e0"},{"url":"https://git.kernel.org/stable/c/40e4eb324c59e11fcb927aa46742d28aba6ecb8a"}],"tags":["cve.org"],"epss":0.0023,"epssPercentile":0.13834,"ingestedAt":"2026-11-05T22:38:31.624Z","slug":"CVE-2022-49907","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnet: mdio: fix undefined behavior in bit shift for __mdiobus_register\n\nShifting signed 32-bit value by 31 bits is undefined, so changing\nsignificant bit to unsigned. The UBSAN warning calltrace like below:\n\nUBSAN: shift-out-of-bounds in drivers/net/phy/mdio_bus.c:586:27\nleft shift of 1 by 31 places cannot be represented in type 'int'\nCall Trace:\n <TASK>\n dump_stack_lvl+0x7d/0xa5\n dump_stack+0x15/0x1b\n ubsan_epilogue+0xe/0x4e\n __ubsan_handle_shift_out_of_bounds+0x1e7/0x20c\n __mdiobus_register+0x49d/0x4e0\n fixed_mdio_bus_init+0xd8/0x12d\n do_one_initcall+0x76/0x430\n kernel_init_freeable+0x3b3/0x422\n kernel_init+0x24/0x1e0\n ret_from_fork+0x1f/0x30\n </TASK>\n\n## Affected\n\n- `Linux >= 4fd5f812c23c7deee6425f4a318e85c317cd1d6c < 20ed01a7b9af6e6a3c33761eebbb710ea6dd49b7`\n- `Linux >= 4fd5f812c23c7deee6425f4a318e85c317cd1d6c < 7006176a3c863e3e353ce1b8a349ef5bb1b9320e`\n- `Linux >= 4fd5f812c23c7deee6425f4a318e85c317cd1d6c < a3fafc974be37319679f36dc4e7cca7db1e02973`\n- `Linux >= 4fd5f812c23c7deee6425f4a318e85c317cd1d6c < 4954b5359eb141499492fadfab891e28905509e2`\n- `Linux >= 4fd5f812c23c7deee6425f4a318e85c317cd1d6c < 634f066d02bdb22a26da7deb0c7617ab1a65fc9d`\n- `Linux >= 4fd5f812c23c7deee6425f4a318e85c317cd1d6c < 985a88bf0b27193522bba7856b1763f428cef19d`\n- `Linux >= 4fd5f812c23c7deee6425f4a318e85c317cd1d6c < 6ce6f8f8f6316da6f92afe7490bc2f0b654d68e0`\n- `Linux >= 4fd5f812c23c7deee6425f4a318e85c317cd1d6c < 40e4eb324c59e11fcb927aa46742d28aba6ecb8a`\n- `Linux 2.6.28`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}