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

Vulnerability from cvelistv5 – Published: 2025-12-24 10:32 – Updated: 2025-12-24 10:32
VLAI?
Title
exfat: fix divide-by-zero in exfat_allocate_bitmap
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.
Severity ?
No CVSS data available.
Assigner
Impacted products
Vendor Product Version
Linux Linux Affected: 9fd688678dd86e3be32a35e3b2c5cc3ef0c4e257 , < 88fc3dd6e631b3e2975f898c6c2b6bc6f7058b44 (git)
Affected: 9fd688678dd86e3be32a35e3b2c5cc3ef0c4e257 , < d70a5804c563b5e34825353ba9927509df709651 (git)
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    Linux Linux Affected: 6.18
Unaffected: 0 , < 6.18 (semver)
Unaffected: 6.18.2 , ≤ 6.18.* (semver)
Unaffected: 6.19-rc1 , ≤ * (original_commit_for_fix)
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{
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          "programFiles": [
            "fs/exfat/balloc.c"
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                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                },
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        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-24T10:32:41.931Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/88fc3dd6e631b3e2975f898c6c2b6bc6f7058b44"
        },
        {
          "url": "https://git.kernel.org/stable/c/d70a5804c563b5e34825353ba9927509df709651"
        }
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      "title": "exfat: fix divide-by-zero in exfat_allocate_bitmap",
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  "cveMetadata": {
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    "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"
  },
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  }
}


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  • 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.
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  • 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.


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