{"id":"CVE-2025-39937","title":"net: rfkill: gpio: Fix crash due to dereferencering uninitialized pointer","summary":"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\") r…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 7d5e9737efda16535e5b54bd627ef4881d11d31f < 184f608a68f96794e8fe58cd5535014d53622cde","Linux >= 7d5e9737efda16535e5b54bd627ef4881d11d31f < 8793e7a8e1b60131a825457174ed6398111daeb7","Linux >= 7d5e9737efda16535e5b54bd627ef4881d11d31f < ada2282259243387e6b6e89239aeb4897e62f051","Linux >= 7d5e9737efda16535e5b54bd627ef4881d11d31f < 47ade5f9d70b23a119ec20b1c6504864b2543a79","Linux >= 7d5e9737efda16535e5b54bd627ef4881d11d31f < 689aee35ce671aab752f159e5c8e66d7685e6887","Linux >= 7d5e9737efda16535e5b54bd627ef4881d11d31f < 21ba85d9d508422ca9e6698463ff9357c928c22d","Linux >= 7d5e9737efda16535e5b54bd627ef4881d11d31f < 21a39b958b4bcf44f7674bfbbe1bbb8cad0d842d","Linux >= 7d5e9737efda16535e5b54bd627ef4881d11d31f < b6f56a44e4c1014b08859dcf04ed246500e310e5","Linux 4.6"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T21:13:07.142657Z"},"published":"2025-10-04","updated":"2026-11-05","sourceUpdated":"2026-11-05T21:23:06.763Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-39937","references":[{"url":"https://git.kernel.org/stable/c/184f608a68f96794e8fe58cd5535014d53622cde"},{"url":"https://git.kernel.org/stable/c/8793e7a8e1b60131a825457174ed6398111daeb7"},{"url":"https://git.kernel.org/stable/c/ada2282259243387e6b6e89239aeb4897e62f051"},{"url":"https://git.kernel.org/stable/c/47ade5f9d70b23a119ec20b1c6504864b2543a79"},{"url":"https://git.kernel.org/stable/c/689aee35ce671aab752f159e5c8e66d7685e6887"},{"url":"https://git.kernel.org/stable/c/21ba85d9d508422ca9e6698463ff9357c928c22d"},{"url":"https://git.kernel.org/stable/c/21a39b958b4bcf44f7674bfbbe1bbb8cad0d842d"},{"url":"https://git.kernel.org/stable/c/b6f56a44e4c1014b08859dcf04ed246500e310e5"}],"tags":["cve.org"],"epss":0.0015,"epssPercentile":0.04188,"ingestedAt":"2026-11-05T22:38:32.050Z","slug":"CVE-2025-39937","body":"## Overview\n\nIn 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->type is set based on the ACPI acpi_device_id:\n\n        rfkill->type = (unsigned)id->driver_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\n\n## Affected\n\n- `Linux >= 7d5e9737efda16535e5b54bd627ef4881d11d31f < 184f608a68f96794e8fe58cd5535014d53622cde`\n- `Linux >= 7d5e9737efda16535e5b54bd627ef4881d11d31f < 8793e7a8e1b60131a825457174ed6398111daeb7`\n- `Linux >= 7d5e9737efda16535e5b54bd627ef4881d11d31f < ada2282259243387e6b6e89239aeb4897e62f051`\n- `Linux >= 7d5e9737efda16535e5b54bd627ef4881d11d31f < 47ade5f9d70b23a119ec20b1c6504864b2543a79`\n- `Linux >= 7d5e9737efda16535e5b54bd627ef4881d11d31f < 689aee35ce671aab752f159e5c8e66d7685e6887`\n- `Linux >= 7d5e9737efda16535e5b54bd627ef4881d11d31f < 21ba85d9d508422ca9e6698463ff9357c928c22d`\n- `Linux >= 7d5e9737efda16535e5b54bd627ef4881d11d31f < 21a39b958b4bcf44f7674bfbbe1bbb8cad0d842d`\n- `Linux >= 7d5e9737efda16535e5b54bd627ef4881d11d31f < b6f56a44e4c1014b08859dcf04ed246500e310e5`\n- `Linux 4.6`\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":[]}