FKIE_CVE-2026-98218

Vulnerability from fkie_nvd - Published: 2026-10-06 09:18 - Updated: 2026-10-06 09:18
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: i2c: atr: fix dangling adapter pointer on add failure i2c_atr_add_adapter() stores atr->adapter[chan_id] before i2c_add_adapter() so that the I2C bus notifier can match child clients during registration. On failure the channel is freed but the slot was left pointing at freed memory, which can lead to use-after-free in i2c_atr_del_adapter() / cleanup and also block reuse with -EEXIST. Clear the slot on the i2c_add_adapter() error path before freeing chan.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1093835f6aef58a831298d93e0d93f244fa07b84
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2f5e42edbd232bf705dc5d3a91e06344237e63bb
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a57d9592714506556e30188af72dd3bdb9f647b5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ad34235808b63a70ca4989b7a2852923193d06ef
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/eabf7a3d33cd9fad106d267d00cc842434de8e02
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/i2c/i2c-atr.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2f5e42edbd232bf705dc5d3a91e06344237e63bb",
              "status": "affected",
              "version": "a076a860acae77bbdcbd316541e5552e81fb1772",
              "versionType": "git"
            },
            {
              "lessThan": "1093835f6aef58a831298d93e0d93f244fa07b84",
              "status": "affected",
              "version": "a076a860acae77bbdcbd316541e5552e81fb1772",
              "versionType": "git"
            },
            {
              "lessThan": "eabf7a3d33cd9fad106d267d00cc842434de8e02",
              "status": "affected",
              "version": "a076a860acae77bbdcbd316541e5552e81fb1772",
              "versionType": "git"
            },
            {
              "lessThan": "a57d9592714506556e30188af72dd3bdb9f647b5",
              "status": "affected",
              "version": "a076a860acae77bbdcbd316541e5552e81fb1772",
              "versionType": "git"
            },
            {
              "lessThan": "ad34235808b63a70ca4989b7a2852923193d06ef",
              "status": "affected",
              "version": "a076a860acae77bbdcbd316541e5552e81fb1772",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/i2c/i2c-atr.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.6"
            },
            {
              "lessThan": "6.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.112",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.54",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc4",
              "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\ni2c: atr: fix dangling adapter pointer on add failure\n\ni2c_atr_add_adapter() stores atr-\u003eadapter[chan_id] before\ni2c_add_adapter() so that the I2C bus notifier can match child clients\nduring registration. On failure the channel is freed but the slot was\nleft pointing at freed memory, which can lead to use-after-free in\ni2c_atr_del_adapter() / cleanup and also block reuse with -EEXIST.\n\nClear the slot on the i2c_add_adapter() error path before freeing chan."
    }
  ],
  "id": "CVE-2026-98218",
  "lastModified": "2026-10-06T09:18:08.590",
  "metrics": {},
  "published": "2026-10-06T09:18:08.590",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1093835f6aef58a831298d93e0d93f244fa07b84"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2f5e42edbd232bf705dc5d3a91e06344237e63bb"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a57d9592714506556e30188af72dd3bdb9f647b5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ad34235808b63a70ca4989b7a2852923193d06ef"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/eabf7a3d33cd9fad106d267d00cc842434de8e02"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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