{"cve":"CVE-2022-50558","nvd":{"published":"2025-10-22T14:15:40.513","modified":"2026-06-17T05:23:47.393","status":"Deferred","description":"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->type_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.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/57bb34330c0fc70bb4ab96399a3c1b80e73e9d49","https://git.kernel.org/stable/c/84498d1fb35de6ab71bdfdb6270a464fb4a0951b","https://git.kernel.org/stable/c/961db32e52f4d34a9a95939a30393fd190397f84"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:12:35.277909958+00:00"},"epss":{"cve":"CVE-2022-50558","score":0.00211,"percentile":0.11432,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}