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CVE-2022-50558 (GCVE-0-2022-50558)

Vulnerability from cvelistv5 – Published: 2025-10-22 13:23 – Updated: 2026-05-11 19:21
VLAI
Title
regmap-irq: Use the new num_config_regs property in regmap_add_irq_chip_fwnode
Summary
In the Linux kernel, the following vulnerability has been resolved: regmap-irq: Use the new num_config_regs property in regmap_add_irq_chip_fwnode Commit faa87ce9196d ("regmap-irq: Introduce config registers for irq types") added the num_config_regs, then commit 9edd4f5aee84 ("regmap-irq: Deprecate type registers and virtual registers") suggested to replace num_type_reg with it. However, regmap_add_irq_chip_fwnode wasn't modified to use the new property. Later on, commit 255a03bb1bb3 ("ASoC: wcd9335: Convert irq chip to config regs") removed the old num_type_reg property from the WCD9335 driver's struct regmap_irq_chip, causing a null pointer dereference in regmap_irq_set_type when it tried to index d->type_buf as it was never allocated in regmap_add_irq_chip_fwnode: [ 39.199374] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 [ 39.200006] Call trace: [ 39.200014] regmap_irq_set_type+0x84/0x1c0 [ 39.200026] __irq_set_trigger+0x60/0x1c0 [ 39.200040] __setup_irq+0x2f4/0x78c [ 39.200051] request_threaded_irq+0xe8/0x1a0 Use num_config_regs in regmap_add_irq_chip_fwnode instead of num_type_reg, and fall back to it if num_config_regs isn't defined to maintain backward compatibility.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: faa87ce9196dbb074d75bd4aecb8bacf18f19b4e , < 57bb34330c0fc70bb4ab96399a3c1b80e73e9d49 (git)
Affected: faa87ce9196dbb074d75bd4aecb8bacf18f19b4e , < 961db32e52f4d34a9a95939a30393fd190397f84 (git)
Affected: faa87ce9196dbb074d75bd4aecb8bacf18f19b4e , < 84498d1fb35de6ab71bdfdb6270a464fb4a0951b (git)
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Linux Linux Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 6.0.16 , ≤ 6.0.* (semver)
Unaffected: 6.1.2 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/base/regmap/regmap-irq.c"
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          "vendor": "Linux",
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              "operator": "OR"
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        {
          "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\u0027t 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\u0027s 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\u0027t defined to maintain backward\ncompatibility."
        }
      ],
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        "dateUpdated": "2026-05-11T19:21:44.839Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
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        }
      ],
      "title": "regmap-irq: Use the new num_config_regs property in regmap_add_irq_chip_fwnode",
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    "datePublished": "2025-10-22T13:23:18.717Z",
    "dateReserved": "2025-10-22T13:20:23.759Z",
    "dateUpdated": "2026-05-11T19:21:44.839Z",
    "state": "PUBLISHED"
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                "programFiles": [
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            "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\u0027t 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\u0027s 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\u0027t defined to maintain backward\ncompatibility."
          }
        ],
        "id": "CVE-2022-50558",
        "lastModified": "2026-06-17T05:23:47.393",
        "metrics": {},
        "published": "2025-10-22T14:15:40.513",
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      "cve": "CVE-2022-50558",
      "id": "CVE-2022-50558",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: regmap-irq: Use the new num_config_regs property in regmap_add_irq_chip_fwnode",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50558.json",
      "version": "3"
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      "cve": "CVE-2022-50558",
      "id": "CVE-2022-50558",
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      "product_status:known_not_affected": "514",
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      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-50558",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-50558.json",
      "version": "8"
    }
  }
}



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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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