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CVE-2026-74463 i2c: jz4780: Cache host clock rate at probe to prevent CCF prepare_lock deadlock

🗓️ 15 Aug 2026 12:27:03Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 44 Views

Linux kernel i2c jz4780 deadlocks on CCF prepare_lock when updating clock-controlled I2C clients.

Related
Affected
Refs
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/i2c/busses/i2c-jz4780.c"
    ],
    "versions": [
      {
        "version": "ba92222ed63a12d09120df9b92f56cc990abac19",
        "lessThan": "cc111696ef420f6bb552b2526530067977f0b406",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "ba92222ed63a12d09120df9b92f56cc990abac19",
        "lessThan": "f96a719d9f8a797105ec5cacf568ab128e33391f",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "ba92222ed63a12d09120df9b92f56cc990abac19",
        "lessThan": "deffad5bb4f8b4f09e46252f24754ddc9960b244",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "ba92222ed63a12d09120df9b92f56cc990abac19",
        "lessThan": "14429dc1c756c35e106f01ff09cadccb82f5531d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "ba92222ed63a12d09120df9b92f56cc990abac19",
        "lessThan": "b6cb47e186abba85a3b08aa3023067ab82577286",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "ba92222ed63a12d09120df9b92f56cc990abac19",
        "lessThan": "19b783335d62e7a2367436a6e1f1b37da1878360",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "ba92222ed63a12d09120df9b92f56cc990abac19",
        "lessThan": "aa1944b52d6492c48bdd17046578aa0d953546e6",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "ba92222ed63a12d09120df9b92f56cc990abac19",
        "lessThan": "d99607c888f26e8a4e9fe9772860cef4aff86bb4",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/i2c/busses/i2c-jz4780.c"
    ],
    "versions": [
      {
        "version": "4.1",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "4.1",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.10.265",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.15.216",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.1.183",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.151",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.103",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.44",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1.8",
        "lessThanOrEqual": "7.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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