FKIE_CVE-2026-52992

Vulnerability from fkie_nvd - Published: 2026-06-24 17:17 - Updated: 2026-06-24 17:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: fs/adfs: validate nzones in adfs_validate_bblk() Reject ADFS disc records with a zero zone count during boot block validation, before the disc record is used. When nzones is 0, adfs_read_map() passes it to kmalloc_array(0, ...) which returns ZERO_SIZE_PTR, and adfs_map_layout() then writes to dm[-1], causing an out-of-bounds write before the allocated buffer. adfs_validate_dr0() already rejects nzones != 1 for old-format images. Add the equivalent check to adfs_validate_bblk() for new-format images so that a crafted image with nzones == 0 is rejected at probe time. Found by syzkaller.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1586bd2d2fb436a26df20a70e78b000d34a7d159
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1f0ed0f57f0fc87e46fe19a05435c214dc464be2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/33aafd2418a59c96c0389d47ea09026661fa9ec6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/60d82592ac8b5637fbed871381eb0a16df0a492e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6ff8cca5cdb4f2e0ea6d28ecd78479dd3f221ebc
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a11372a8b1ceaa5e950a84b3b5fbf8228f25e277
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a3fd5dc1c7b0aae947a67dc2e2c037d57557a4de
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dd9d3e16c2d5fa166e13dce07413be51f42c8f5d
Impacted products
Vendor Product Version
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{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/adfs/super.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "33aafd2418a59c96c0389d47ea09026661fa9ec6",
              "status": "affected",
              "version": "f6f14a0d71b0773a1d4147d1a3c33d537cd213ab",
              "versionType": "git"
            },
            {
              "lessThan": "1f0ed0f57f0fc87e46fe19a05435c214dc464be2",
              "status": "affected",
              "version": "f6f14a0d71b0773a1d4147d1a3c33d537cd213ab",
              "versionType": "git"
            },
            {
              "lessThan": "6ff8cca5cdb4f2e0ea6d28ecd78479dd3f221ebc",
              "status": "affected",
              "version": "f6f14a0d71b0773a1d4147d1a3c33d537cd213ab",
              "versionType": "git"
            },
            {
              "lessThan": "a11372a8b1ceaa5e950a84b3b5fbf8228f25e277",
              "status": "affected",
              "version": "f6f14a0d71b0773a1d4147d1a3c33d537cd213ab",
              "versionType": "git"
            },
            {
              "lessThan": "1586bd2d2fb436a26df20a70e78b000d34a7d159",
              "status": "affected",
              "version": "f6f14a0d71b0773a1d4147d1a3c33d537cd213ab",
              "versionType": "git"
            },
            {
              "lessThan": "a3fd5dc1c7b0aae947a67dc2e2c037d57557a4de",
              "status": "affected",
              "version": "f6f14a0d71b0773a1d4147d1a3c33d537cd213ab",
              "versionType": "git"
            },
            {
              "lessThan": "60d82592ac8b5637fbed871381eb0a16df0a492e",
              "status": "affected",
              "version": "f6f14a0d71b0773a1d4147d1a3c33d537cd213ab",
              "versionType": "git"
            },
            {
              "lessThan": "dd9d3e16c2d5fa166e13dce07413be51f42c8f5d",
              "status": "affected",
              "version": "f6f14a0d71b0773a1d4147d1a3c33d537cd213ab",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/adfs/super.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.6"
            },
            {
              "lessThan": "5.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.258",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.209",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.175",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.141",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.91",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.33",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "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\nfs/adfs: validate nzones in adfs_validate_bblk()\n\nReject ADFS disc records with a zero zone count during boot block\nvalidation, before the disc record is used.\n\nWhen nzones is 0, adfs_read_map() passes it to kmalloc_array(0, ...)\nwhich returns ZERO_SIZE_PTR, and adfs_map_layout() then writes to\ndm[-1], causing an out-of-bounds write before the allocated buffer.\n\nadfs_validate_dr0() already rejects nzones != 1 for old-format\nimages.  Add the equivalent check to adfs_validate_bblk() for\nnew-format images so that a crafted image with nzones == 0 is\nrejected at probe time.\n\nFound by syzkaller."
    }
  ],
  "id": "CVE-2026-52992",
  "lastModified": "2026-06-24T17:17:10.083",
  "metrics": {},
  "published": "2026-06-24T17:17:10.083",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1586bd2d2fb436a26df20a70e78b000d34a7d159"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1f0ed0f57f0fc87e46fe19a05435c214dc464be2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/33aafd2418a59c96c0389d47ea09026661fa9ec6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/60d82592ac8b5637fbed871381eb0a16df0a492e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6ff8cca5cdb4f2e0ea6d28ecd78479dd3f221ebc"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a11372a8b1ceaa5e950a84b3b5fbf8228f25e277"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a3fd5dc1c7b0aae947a67dc2e2c037d57557a4de"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/dd9d3e16c2d5fa166e13dce07413be51f42c8f5d"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}


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