FKIE_CVE-2026-53344

Vulnerability from fkie_nvd - Published: 2026-07-01 14:16 - Updated: 2026-07-01 14:16
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: pinctrl: mcp23s08: Initialize mcp->dev and mcp->addr before regmap init Regmap initialization triggers regcache_maple_populate() which attempts SPI read to populate cache. SPI read requires mcp->dev and mcp->addr to be set, without them, NULL pointer dereference occurs during probe. Move initialization before mcp23s08_spi_regmap_init() call.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3a13bb9540dfd7014c5601608afcbbadbbcfd673
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8473c3a197b57ff01396f7a2ec6ddf65383820d4
Impacted products
Vendor Product Version
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{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/pinctrl/pinctrl-mcp23s08_spi.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "3a13bb9540dfd7014c5601608afcbbadbbcfd673",
              "status": "affected",
              "version": "f9f4fda15e720686f1b2b436591ab11255e4e85e",
              "versionType": "git"
            },
            {
              "lessThan": "8473c3a197b57ff01396f7a2ec6ddf65383820d4",
              "status": "affected",
              "version": "f9f4fda15e720686f1b2b436591ab11255e4e85e",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/pinctrl/pinctrl-mcp23s08_spi.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.19"
            },
            {
              "lessThan": "6.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npinctrl: mcp23s08: Initialize mcp-\u003edev and mcp-\u003eaddr before regmap init\n\nRegmap initialization triggers regcache_maple_populate() which attempts\nSPI read to populate cache. SPI read requires mcp-\u003edev and mcp-\u003eaddr to\nbe set, without them, NULL pointer dereference occurs during probe.\n\nMove initialization before mcp23s08_spi_regmap_init() call."
    }
  ],
  "id": "CVE-2026-53344",
  "lastModified": "2026-07-01T14:16:42.480",
  "metrics": {},
  "published": "2026-07-01T14:16:42.480",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3a13bb9540dfd7014c5601608afcbbadbbcfd673"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8473c3a197b57ff01396f7a2ec6ddf65383820d4"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}


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