CVE-2026-99022 (GCVE-0-2026-99022)
Vulnerability from cvelistv5
Published
2026-10-23 12:21
Modified
2026-10-30 12:40
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: regulator: ltc3676: don't read the write-only HRST and CLIRQ registers HRST (0x1e) and CLIRQ (0x1f) are write-only command strobes. Writing HRST triggers a hard reset of the chip and writing CLIRQ clears the interrupt; reading them returns nothing useful, and the read itself fires the command. The result is that a plain register dump resets the board: cat /sys/kernel/debug/regmap/2-003c/registers walks every readable register, hits HRST, and the board reboots. Split the callback back in two so HRST and CLIRQ stay writable but are no longer readable. The readable range is left unchanged (LTC3676_BUCK1 ... LTC3676_IRQSTAT).
References
Impacted products
Vendor Product Version
Linux Linux Version: 37b918a034feda1b1ef404acf003812f37ab8da2
Version: 37b918a034feda1b1ef404acf003812f37ab8da2
Version: 37b918a034feda1b1ef404acf003812f37ab8da2
Version: 37b918a034feda1b1ef404acf003812f37ab8da2
Version: 37b918a034feda1b1ef404acf003812f37ab8da2
Version: 37b918a034feda1b1ef404acf003812f37ab8da2
Version: 37b918a034feda1b1ef404acf003812f37ab8da2
Version: 37b918a034feda1b1ef404acf003812f37ab8da2
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{
  "containers": {
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          "programFiles": [
            "drivers/regulator/ltc3676.c"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nregulator: ltc3676: don\u0027t read the write-only HRST and CLIRQ registers\n\nHRST (0x1e) and CLIRQ (0x1f) are write-only command strobes. Writing HRST\ntriggers a hard reset of the chip and writing CLIRQ clears the interrupt;\nreading them returns nothing useful, and the read itself fires the command.\n\nThe result is that a plain register dump resets the board:\n\n  cat /sys/kernel/debug/regmap/2-003c/registers\n\nwalks every readable register, hits HRST, and the board reboots.\n\nSplit the callback back in two so HRST and CLIRQ stay writable but are no\nlonger readable. The readable range is left unchanged\n(LTC3676_BUCK1 ... LTC3676_IRQSTAT)."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-30T12:40:59.813Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/4cc1e849bb7dd8deb37f6a51e1aaf725e2016595"
        },
        {
          "url": "https://git.kernel.org/stable/c/0893de2397d85547d4b88379044aa541b07b56af"
        },
        {
          "url": "https://git.kernel.org/stable/c/f8b0ccdcf3ca7cf6e4c2c400e80f81a727f768c7"
        },
        {
          "url": "https://git.kernel.org/stable/c/fd376d83741118e0212f0da985889c1a98d9c827"
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          "url": "https://git.kernel.org/stable/c/1fb0d58fd363b439b4faf08a16ee6ae38b575cd4"
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          "url": "https://git.kernel.org/stable/c/199a62d70314d21f06a9a6faaa3ef54d0404910c"
        },
        {
          "url": "https://git.kernel.org/stable/c/ca5d85335a8fa6e87b45629f1a07b412482cab17"
        },
        {
          "url": "https://git.kernel.org/stable/c/28c2388ee24cdbefbcc458fa41ef7bffaaa1cc83"
        }
      ],
      "title": "regulator: ltc3676: don\u0027t read the write-only HRST and CLIRQ registers",
      "x_generator": {
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-99022",
    "datePublished": "2026-10-23T12:21:03.138Z",
    "dateReserved": "2026-09-25T10:25:14.386Z",
    "dateUpdated": "2026-10-30T12:40:59.813Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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