FKIE_CVE-2026-74553

Vulnerability from fkie_nvd - Published: 2026-08-15 13:18 - Updated: 2026-08-17 06:19
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: hwmon: (nct6775-core) Fix number of temperature registers for NCT6116 Unlike NCT6106, NCT6116 only has three temperature registers, and with it only three temperature source and temperature source configuration registers. The register addresses match those of NCT6106 and can be re-used. The code used a separate array to list the temperature source registers for NCT6116, but used the size of the NCT6106 register array to set the number of registers. The NCT6106 register array provides six addresses, while the temperature source register array for NCT6116 only provides three addresses. This causes a KASAN report. BUG: KASAN: global-out-of-bounds in nct6775_probe+0x936/0x46f0 [nct6775] Read of size 2 at addr ffffffffc19561a6 by task modprobe/954 ... Call Trace: dump_stack+0x7d/0xa7 print_address_description.constprop.0+0x1c/0x220 ? __kasan_kmalloc.constprop.0+0xc9/0xd0 ? __kmalloc_node_track_caller+0x194/0x5b0 ? nct6775_probe+0x936/0x46f0 [nct6775] ? nct6775_probe+0x936/0x46f0 [nct6775] ... Fix the problem by hard-coding the number of temperature and temperature configuration registers to three for NCT6116. Drop the unnecessary NCT6116_REG_TEMP_SOURCE array and re-use NCT6106_REG_TEMP_SOURCE.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/16c45bb3d3434cfb9ea264fa52090d0823240465
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9a87dfaa05c3c9d3a4cdb7eafc1ab4abc84f6eef
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a42d727dae5701deac8bb2a75effadae7d681153
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a7f47f5246cd6c3199e5fb2d4109cc53e766e3f0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b0e8adb2ccb43009796897ced09f91636685c9d3
Impacted products
Vendor Product Version
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{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/hwmon/nct6775-core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "9a87dfaa05c3c9d3a4cdb7eafc1ab4abc84f6eef",
              "status": "affected",
              "version": "29c7cb485b321c024dedc168bcbb04451176b163",
              "versionType": "git"
            },
            {
              "lessThan": "16c45bb3d3434cfb9ea264fa52090d0823240465",
              "status": "affected",
              "version": "29c7cb485b321c024dedc168bcbb04451176b163",
              "versionType": "git"
            },
            {
              "lessThan": "a42d727dae5701deac8bb2a75effadae7d681153",
              "status": "affected",
              "version": "29c7cb485b321c024dedc168bcbb04451176b163",
              "versionType": "git"
            },
            {
              "lessThan": "a7f47f5246cd6c3199e5fb2d4109cc53e766e3f0",
              "status": "affected",
              "version": "29c7cb485b321c024dedc168bcbb04451176b163",
              "versionType": "git"
            },
            {
              "lessThan": "b0e8adb2ccb43009796897ced09f91636685c9d3",
              "status": "affected",
              "version": "29c7cb485b321c024dedc168bcbb04451176b163",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/hwmon/nct6775-core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.4"
            },
            {
              "lessThan": "5.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.151",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.103",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.44",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "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\nhwmon: (nct6775-core) Fix number of temperature registers for NCT6116\n\nUnlike NCT6106, NCT6116 only has three temperature registers, and with\nit only three temperature source and temperature source configuration\nregisters. The register addresses match those of NCT6106 and can be\nre-used.\n\nThe code used a separate array to list the temperature source registers\nfor NCT6116, but used the size of the NCT6106 register array to set\nthe number of registers. The NCT6106 register array provides six addresses,\nwhile the temperature source register array for NCT6116 only provides three\naddresses. This causes a KASAN report.\n\nBUG: KASAN: global-out-of-bounds in nct6775_probe+0x936/0x46f0 [nct6775]\nRead of size 2 at addr ffffffffc19561a6 by task modprobe/954\n...\nCall Trace:\n dump_stack+0x7d/0xa7\n print_address_description.constprop.0+0x1c/0x220\n ? __kasan_kmalloc.constprop.0+0xc9/0xd0\n ? __kmalloc_node_track_caller+0x194/0x5b0\n ? nct6775_probe+0x936/0x46f0 [nct6775]\n ? nct6775_probe+0x936/0x46f0 [nct6775]\n...\n\nFix the problem by hard-coding the number of temperature and temperature\nconfiguration registers to three for NCT6116. Drop the unnecessary\nNCT6116_REG_TEMP_SOURCE array and re-use NCT6106_REG_TEMP_SOURCE."
    }
  ],
  "id": "CVE-2026-74553",
  "lastModified": "2026-08-17T06:19:53.380",
  "metrics": {},
  "published": "2026-08-15T13:18:00.710",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/16c45bb3d3434cfb9ea264fa52090d0823240465"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9a87dfaa05c3c9d3a4cdb7eafc1ab4abc84f6eef"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a42d727dae5701deac8bb2a75effadae7d681153"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a7f47f5246cd6c3199e5fb2d4109cc53e766e3f0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b0e8adb2ccb43009796897ced09f91636685c9d3"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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