CVE-2026-98218

Full vulnerability record from the local CVENow database.

Description

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.

Severity

Not scored

CVSS score

Not available

Vulnerability status

Received

Source identifier

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-10-06 09:18:08.590000

Last modified

2026-10-19 10:18:22.583000

View original CVE JSON

{
  "id": "CVE-2026-98218",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-10-06T09:18:08.590",
  "lastModified": "2026-10-19T10:18:22.583",
  "vulnStatus": "Received",
  "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->adapter[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."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/i2c/i2c-atr.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "a076a860acae77bbdcbd316541e5552e81fb1772",
              "lessThan": "2f5e42edbd232bf705dc5d3a91e06344237e63bb",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "a076a860acae77bbdcbd316541e5552e81fb1772",
              "lessThan": "1093835f6aef58a831298d93e0d93f244fa07b84",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "a076a860acae77bbdcbd316541e5552e81fb1772",
              "lessThan": "eabf7a3d33cd9fad106d267d00cc842434de8e02",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "a076a860acae77bbdcbd316541e5552e81fb1772",
              "lessThan": "a57d9592714506556e30188af72dd3bdb9f647b5",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "a076a860acae77bbdcbd316541e5552e81fb1772",
              "lessThan": "ad34235808b63a70ca4989b7a2852923193d06ef",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/i2c/i2c-atr.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "6.6",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "6.6",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.158",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.112",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.54",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.8",
              "lessThanOrEqual": "7.2.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.3",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "references": [
    {
      "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",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}