CVE-2026-93828 (GCVE-0-2026-93828)

Vulnerability from cvelistv5 – Published: 2026-09-24 16:03 – Updated: 2026-09-25 12:43
VLAI
Title
exfat: fix handling of damaged volume in exfat_create_upcase_table()
Summary
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
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 370e812b3ec190fa492c9fd5a80c38b086d105c0 , < 60ace93811609e4dd883e9de5fb4462ed834160a (git)
Affected: 370e812b3ec190fa492c9fd5a80c38b086d105c0 , < 2cc0b612343638057ef321ce735201a7c2f52f25 (git)
Affected: 370e812b3ec190fa492c9fd5a80c38b086d105c0 , < 20dd3185d13865214ff25b0bf7b931e8d73be1ac (git)
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Linux Linux Affected: 5.7
Unaffected: 0 , < 5.7 (semver)
Unaffected: 6.12.111 , ≤ 6.12.* (semver)
Unaffected: 6.18.53 , ≤ 6.18.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/exfat/nls.c"
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          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "370e812b3ec190fa492c9fd5a80c38b086d105c0",
              "versionType": "git"
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      ],
      "cpeApplicability": [
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                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-25T12:43:37.994Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/60ace93811609e4dd883e9de5fb4462ed834160a"
        },
        {
          "url": "https://git.kernel.org/stable/c/2cc0b612343638057ef321ce735201a7c2f52f25"
        },
        {
          "url": "https://git.kernel.org/stable/c/20dd3185d13865214ff25b0bf7b931e8d73be1ac"
        }
      ],
      "title": "exfat: fix handling of damaged volume in exfat_create_upcase_table()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-93828",
    "datePublished": "2026-09-24T16:03:08.417Z",
    "dateReserved": "2026-09-18T17:59:28.793Z",
    "dateUpdated": "2026-09-25T12:43:37.994Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "date": "2026-09-27",
      "epss": "0.00166",
      "percentile": "0.05228"
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    "nvd": {
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                "programFiles": [
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                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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                    "versionType": "semver"
                  },
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                  }
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            ],
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          }
        ],
        "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."
          }
        ],
        "id": "CVE-2026-93828",
        "lastModified": "2026-09-25T13:17:23.633",
        "metrics": {},
        "published": "2026-09-24T17:17:16.517",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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        "vulnStatus": "Received"
      }
    },
    "suse_vex": {
      "aggregate_severity": "not set",
      "current_release_date": "2026-09-24T23:47:03Z",
      "cve": "CVE-2026-93828",
      "id": "CVE-2026-93828",
      "initial_release_date": "2026-09-24T23:47:03Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-93828",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-93828.json",
      "version": "2"
    }
  }
}



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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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