{"id":"CVE-2025-39937","summary":"net: rfkill: gpio: Fix crash due to dereferencering uninitialized pointer","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: rfkill: gpio: Fix crash due to dereferencering uninitialized pointer\n\nSince commit 7d5e9737efda (\"net: rfkill: gpio: get the name and type from\ndevice property\") rfkill_find_type() gets called with the possibly\nuninitialized \"const char *type_name;\" local variable.\n\nOn x86 systems when rfkill-gpio binds to a \"BCM4752\" or \"LNV4752\"\nacpi_device, the rfkill-\u003etype is set based on the ACPI acpi_device_id:\n\n        rfkill-\u003etype = (unsigned)id-\u003edriver_data;\n\nand there is no \"type\" property so device_property_read_string() will fail\nand leave type_name uninitialized, leading to a potential crash.\n\nrfkill_find_type() does accept a NULL pointer, fix the potential crash\nby initializing type_name to NULL.\n\nNote likely sofar this has not been caught because:\n\n1. Not many x86 machines actually have a \"BCM4752\"/\"LNV4752\" acpi_device\n2. The stack happened to contain NULL where type_name is stored","modified":"2026-04-16T04:31:45.077764571Z","published":"2025-10-04T07:31:00.879Z","related":["SUSE-SU-2025:21040-1","SUSE-SU-2025:21052-1","SUSE-SU-2025:21056-1","SUSE-SU-2025:21064-1","SUSE-SU-2025:21074-1","SUSE-SU-2025:21139-1","SUSE-SU-2025:21179-1","SUSE-SU-2025:4057-1","SUSE-SU-2025:4128-1","SUSE-SU-2025:4132-1","SUSE-SU-2025:4140-1","SUSE-SU-2025:4141-1","SUSE-SU-2025:4301-1","openSUSE-SU-2025:20081-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39937.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/184f608a68f96794e8fe58cd5535014d53622cde"},{"type":"WEB","url":"https://git.kernel.org/stable/c/21a39b958b4bcf44f7674bfbbe1bbb8cad0d842d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/21ba85d9d508422ca9e6698463ff9357c928c22d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/47ade5f9d70b23a119ec20b1c6504864b2543a79"},{"type":"WEB","url":"https://git.kernel.org/stable/c/689aee35ce671aab752f159e5c8e66d7685e6887"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8793e7a8e1b60131a825457174ed6398111daeb7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ada2282259243387e6b6e89239aeb4897e62f051"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b6f56a44e4c1014b08859dcf04ed246500e310e5"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39937.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-39937"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"7d5e9737efda16535e5b54bd627ef4881d11d31f"},{"fixed":"184f608a68f96794e8fe58cd5535014d53622cde"},{"fixed":"8793e7a8e1b60131a825457174ed6398111daeb7"},{"fixed":"ada2282259243387e6b6e89239aeb4897e62f051"},{"fixed":"47ade5f9d70b23a119ec20b1c6504864b2543a79"},{"fixed":"689aee35ce671aab752f159e5c8e66d7685e6887"},{"fixed":"21ba85d9d508422ca9e6698463ff9357c928c22d"},{"fixed":"21a39b958b4bcf44f7674bfbbe1bbb8cad0d842d"},{"fixed":"b6f56a44e4c1014b08859dcf04ed246500e310e5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-39937.json"}}],"schema_version":"1.7.5"}