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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>"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: mdio: corrige comportamiento indefinido en el desplazamiento de bits para __mdiobus_register El desplazamiento de un valor de 32 bits con signo en 31 bits no est\u00e1 definido, por lo que se cambia el bit significativo a sin signo. El seguimiento de llamadas de advertencia de UBSAN como se muestra a continuaci\u00f3n: UBSAN: desplazamiento fuera de los l\u00edmites en drivers/net/phy/mdio_bus.c:586:27 El desplazamiento a la izquierda de 1 por 31 lugares no se puede representar en el tipo 'int' Seguimiento de llamadas: 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 "}], "id": "CVE-2022-49907", "lastModified": "2025-11-11T01:41:23.667", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "[email protected]", "type": "Primary"}]}, "published": "2025-05-01T15:16:15.810", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/20ed01a7b9af6e6a3c33761eebbb710ea6dd49b7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/40e4eb324c59e11fcb927aa46742d28aba6ecb8a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4954b5359eb141499492fadfab891e28905509e2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/634f066d02bdb22a26da7deb0c7617ab1a65fc9d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6ce6f8f8f6316da6f92afe7490bc2f0b654d68e0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7006176a3c863e3e353ce1b8a349ef5bb1b9320e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/985a88bf0b27193522bba7856b1763f428cef19d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a3fafc974be37319679f36dc4e7cca7db1e02973"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "[email protected]", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: net: mdio: fix undefined behavior in bit shift for __mdiobus_register", "id": "2363465", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2363465"}, "csaw": false, "cvss3": {"cvss3_base_score": "1.9", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet: mdio: fix undefined behavior in bit shift for __mdiobus_register\nShifting signed 32-bit value by 31 bits is undefined, so changing\nsignificant bit to unsigned. The UBSAN warning calltrace like below:\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>\ndump_stack_lvl+0x7d/0xa5\ndump_stack+0x15/0x1b\nubsan_epilogue+0xe/0x4e\n__ubsan_handle_shift_out_of_bounds+0x1e7/0x20c\n__mdiobus_register+0x49d/0x4e0\nfixed_mdio_bus_init+0xd8/0x12d\ndo_one_initcall+0x76/0x430\nkernel_init_freeable+0x3b3/0x422\nkernel_init+0x24/0x1e0\nret_from_fork+0x1f/0x30\n</TASK>"], "name": "CVE-2022-49907", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-05-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49907\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49907\nhttps://lore.kernel.org/linux-cve-announce/2025050103-CVE-2022-49907-f684@gregkh/T"], "statement": "Undefined behavior due to signed integer shift in __mdiobus_register. May lead to kernel crash or unexpected behavior on platforms with runtime sanitizers. The security impact is limited.", "threat_severity": "Low"}