{"id":"CVE-2022-50558","state":"PUBLISHED","title":"regmap-irq: Use the new num_config_regs property in regmap_add_irq_chip_fwnode","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.","publishedAt":"2025-10-22T13:23:18.717Z","updatedAt":"2026-05-11T19:21:44.839Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"faa87ce9196dbb074d75bd4aecb8bacf18f19b4e","status":"affected","lessThan":"57bb34330c0fc70bb4ab96399a3c1b80e73e9d49","versionType":"git"},{"version":"faa87ce9196dbb074d75bd4aecb8bacf18f19b4e","status":"affected","lessThan":"961db32e52f4d34a9a95939a30393fd190397f84","versionType":"git"},{"version":"faa87ce9196dbb074d75bd4aecb8bacf18f19b4e","status":"affected","lessThan":"84498d1fb35de6ab71bdfdb6270a464fb4a0951b","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/base/regmap/regmap-irq.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.0","versionType":"semver"},{"version":"6.0.16","status":"unaffected","lessThanOrEqual":"6.0.*","versionType":"semver"},{"version":"6.1.2","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/base/regmap/regmap-irq.c"]}],"references":["https://git.kernel.org/stable/c/57bb34330c0fc70bb4ab96399a3c1b80e73e9d49","https://git.kernel.org/stable/c/961db32e52f4d34a9a95939a30393fd190397f84","https://git.kernel.org/stable/c/84498d1fb35de6ab71bdfdb6270a464fb4a0951b"],"weaknesses":[],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/50xxx/CVE-2022-50558.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-50558","state":"PUBLISHED","datePublished":"2025-10-22T13:23:18.717Z","dateUpdated":"2026-05-11T19:21:44.839Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-10-22T13:20:23.759Z"},"containers":{"cna":{"title":"regmap-irq: Use the new num_config_regs property in regmap_add_irq_chip_fwnode","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"faa87ce9196dbb074d75bd4aecb8bacf18f19b4e","status":"affected","lessThan":"57bb34330c0fc70bb4ab96399a3c1b80e73e9d49","versionType":"git"},{"version":"faa87ce9196dbb074d75bd4aecb8bacf18f19b4e","status":"affected","lessThan":"961db32e52f4d34a9a95939a30393fd190397f84","versionType":"git"},{"version":"faa87ce9196dbb074d75bd4aecb8bacf18f19b4e","status":"affected","lessThan":"84498d1fb35de6ab71bdfdb6270a464fb4a0951b","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/base/regmap/regmap-irq.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.0","versionType":"semver"},{"version":"6.0.16","status":"unaffected","lessThanOrEqual":"6.0.*","versionType":"semver"},{"version":"6.1.2","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/base/regmap/regmap-irq.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/57bb34330c0fc70bb4ab96399a3c1b80e73e9d49"},{"url":"https://git.kernel.org/stable/c/961db32e52f4d34a9a95939a30393fd190397f84"},{"url":"https://git.kernel.org/stable/c/84498d1fb35de6ab71bdfdb6270a464fb4a0951b"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:21:44.839Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.0.16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.1.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}