fkie_nvd - fkie_cve-2025-68350

FKIE_CVE-2025-68350

Vulnerability from fkie_nvd - Published: 2025-12-24 11:15 - Updated: 2025-12-29 15:58

Severity ?

Summary

In the Linux kernel, the following vulnerability has been resolved: exfat: fix divide-by-zero in exfat_allocate_bitmap The variable max_ra_count can be 0 in exfat_allocate_bitmap(), which causes a divide-by-zero error in the subsequent modulo operation (i % max_ra_count), leading to a system crash. When max_ra_count is 0, it means that readahead is not used. This patch load the bitmap without readahead.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/88fc3dd6e631b3e2975f898c6c2b6bc6f7058b44
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d70a5804c563b5e34825353ba9927509df709651

Impacted products

	Vendor	Product	Version

JSON

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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nexfat: fix divide-by-zero in exfat_allocate_bitmap\n\nThe variable max_ra_count can be 0 in exfat_allocate_bitmap(),\nwhich causes a divide-by-zero error in the subsequent modulo operation\n(i % max_ra_count), leading to a system crash.\nWhen max_ra_count is 0, it means that readahead is not used. This patch\nload the bitmap without readahead."
    }
  ],
  "id": "CVE-2025-68350",
  "lastModified": "2025-12-29T15:58:56.260",
  "metrics": {},
  "published": "2025-12-24T11:15:58.350",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/88fc3dd6e631b3e2975f898c6c2b6bc6f7058b44"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d70a5804c563b5e34825353ba9927509df709651"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}

CVE-2025-68350 (GCVE-0-2025-68350)

Vulnerability from cvelistv5 – Published: 2025-12-24 10:32 – Updated: 2025-12-24 10:32

Title

exfat: fix divide-by-zero in exfat_allocate_bitmap

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/88fc3dd6e631b3e29…
	https://git.kernel.org/stable/c/d70a5804c563b5e34…

Impacted products

Vendor

Product

Version

Linux

Affected: 9fd688678dd86e3be32a35e3b2c5cc3ef0c4e257 , < 88fc3dd6e631b3e2975f898c6c2b6bc6f7058b44 (git)
Affected: 9fd688678dd86e3be32a35e3b2c5cc3ef0c4e257 , < d70a5804c563b5e34825353ba9927509df709651 (git)

Linux

Affected: 6.18
Unaffected: 0 , < 6.18 (semver)
Unaffected: 6.18.2 , ≤ 6.18.* (semver)
Unaffected: 6.19-rc1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/exfat/balloc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "88fc3dd6e631b3e2975f898c6c2b6bc6f7058b44",
              "status": "affected",
              "version": "9fd688678dd86e3be32a35e3b2c5cc3ef0c4e257",
              "versionType": "git"
            },
            {
              "lessThan": "d70a5804c563b5e34825353ba9927509df709651",
              "status": "affected",
              "version": "9fd688678dd86e3be32a35e3b2c5cc3ef0c4e257",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/exfat/balloc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.18"
            },
            {
              "lessThan": "6.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.2",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19-rc1",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nexfat: fix divide-by-zero in exfat_allocate_bitmap\n\nThe variable max_ra_count can be 0 in exfat_allocate_bitmap(),\nwhich causes a divide-by-zero error in the subsequent modulo operation\n(i % max_ra_count), leading to a system crash.\nWhen max_ra_count is 0, it means that readahead is not used. This patch\nload the bitmap without readahead."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-24T10:32:41.931Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/88fc3dd6e631b3e2975f898c6c2b6bc6f7058b44"
        },
        {
          "url": "https://git.kernel.org/stable/c/d70a5804c563b5e34825353ba9927509df709651"
        }
      ],
      "title": "exfat: fix divide-by-zero in exfat_allocate_bitmap",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68350",
    "datePublished": "2025-12-24T10:32:41.931Z",
    "dateReserved": "2025-12-16T14:48:05.300Z",
    "dateUpdated": "2025-12-24T10:32:41.931Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2025-68350

CVE-2025-68350 (GCVE-0-2025-68350)

Tags

Sightings

Nomenclature