CVE-2026-93828

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: exfat: fix handling of damaged volume in exfat_create_upcase_table() When the size of the upcase table is set to zero in the dentry for any reason(e.g. corrupted media or misbehaving device), an integer overflow causes the module to loop indefinitely. If the size of the upcase table is read zero, do not attempt to load the table. Instead, fallback to loading the default upcase table. If the size of the upcase table is zero or no upcase table is found, raise exfat_fs_error() to mark the volume read-only.

Severity

Not scored

CVSS score

Not available

Vulnerability status

Received

Source identifier

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

Published

2026-09-24 17:17:16.517000

Last modified

2026-10-30 13:21:03.580000

View original CVE JSON

{
  "id": "CVE-2026-93828",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-09-24T17:17:16.517",
  "lastModified": "2026-10-30T13:21:03.580",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nexfat: fix handling of damaged volume in exfat_create_upcase_table()\n\nWhen the size of the upcase table is set to zero in the dentry for any\nreason(e.g. corrupted media or misbehaving device), an integer overflow\ncauses the module to loop indefinitely.\n\nIf the size of the upcase table is read zero, do not attempt to load the\ntable. Instead, fallback to loading the default upcase table. If the\nsize of the upcase table is zero or no upcase table is found, raise\nexfat_fs_error() to mark the volume read-only."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "fs/exfat/nls.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "370e812b3ec190fa492c9fd5a80c38b086d105c0",
              "lessThan": "091ca992218105a050af0b863337e02a2d518b2f",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "370e812b3ec190fa492c9fd5a80c38b086d105c0",
              "lessThan": "29723256fccf46e55c2a44bd6b8345bef7ba079b",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "370e812b3ec190fa492c9fd5a80c38b086d105c0",
              "lessThan": "60ace93811609e4dd883e9de5fb4462ed834160a",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "370e812b3ec190fa492c9fd5a80c38b086d105c0",
              "lessThan": "2cc0b612343638057ef321ce735201a7c2f52f25",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "370e812b3ec190fa492c9fd5a80c38b086d105c0",
              "lessThan": "20dd3185d13865214ff25b0bf7b931e8d73be1ac",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "fs/exfat/nls.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "5.7",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "5.7",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.1.191",
              "lessThanOrEqual": "6.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.160",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.111",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.53",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/091ca992218105a050af0b863337e02a2d518b2f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/20dd3185d13865214ff25b0bf7b931e8d73be1ac",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/29723256fccf46e55c2a44bd6b8345bef7ba079b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/2cc0b612343638057ef321ce735201a7c2f52f25",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/60ace93811609e4dd883e9de5fb4462ed834160a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}