{"id":"CVE-2022-50558","summary":"regmap-irq: Use the new num_config_regs property in regmap_add_irq_chip_fwnode","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nregmap-irq: Use the new num_config_regs property in regmap_add_irq_chip_fwnode\n\nCommit faa87ce9196d (\"regmap-irq: Introduce config registers for irq\ntypes\") added the num_config_regs, then commit 9edd4f5aee84 (\"regmap-irq:\nDeprecate type registers and virtual registers\") suggested to replace\nnum_type_reg with it. However, regmap_add_irq_chip_fwnode wasn't modified\nto use the new property. Later on, commit 255a03bb1bb3 (\"ASoC: wcd9335:\nConvert irq chip to config regs\") removed the old num_type_reg property\nfrom the WCD9335 driver's struct regmap_irq_chip, causing a null pointer\ndereference in regmap_irq_set_type when it tried to index d-\u003etype_buf as\nit was never allocated in regmap_add_irq_chip_fwnode:\n\n[   39.199374] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000\n\n[   39.200006] Call trace:\n[   39.200014]  regmap_irq_set_type+0x84/0x1c0\n[   39.200026]  __irq_set_trigger+0x60/0x1c0\n[   39.200040]  __setup_irq+0x2f4/0x78c\n[   39.200051]  request_threaded_irq+0xe8/0x1a0\n\nUse num_config_regs in regmap_add_irq_chip_fwnode instead of num_type_reg,\nand fall back to it if num_config_regs isn't defined to maintain backward\ncompatibility.","modified":"2026-04-02T08:28:38.107469Z","published":"2025-10-22T13:23:18.717Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50558.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/57bb34330c0fc70bb4ab96399a3c1b80e73e9d49"},{"type":"WEB","url":"https://git.kernel.org/stable/c/84498d1fb35de6ab71bdfdb6270a464fb4a0951b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/961db32e52f4d34a9a95939a30393fd190397f84"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50558.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-50558"},{"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":"faa87ce9196dbb074d75bd4aecb8bacf18f19b4e"},{"fixed":"57bb34330c0fc70bb4ab96399a3c1b80e73e9d49"},{"fixed":"961db32e52f4d34a9a95939a30393fd190397f84"},{"fixed":"84498d1fb35de6ab71bdfdb6270a464fb4a0951b"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50558.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.0.0"},{"fixed":"6.0.16"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.1.0"},{"fixed":"6.1.2"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50558.json"}}],"schema_version":"1.7.5"}