CVE-2026-98681

Status: ReceivedUnscored—

Severity—Unscored

Exploitation probability0.17 %higher than 6% of CVEs

Active exploitationNonot in the CISA catalog

Public exploitNot knownno public code found

In the Linux kernel, the following vulnerability has been resolved:

smb: client: split cifsFileInfo bitfields to avoid shared-byte RMW races

The invalidHandle, swapfile, oplock_break_cancelled, offload, and status_file_deleted fields are stored in the same bitfield byte in struct cifsFileInfo, but are updated in different code paths that may run simultaneously, and are protected by different locks. Since bitfield assignments generate byte-level read-modify-write operations, a modification to one flag can overwrite a concurrent modification to another flag.

To avoid these races, convert these flags from a bitfield to separate bool fields.

CVSS

NVD hasn't assigned a CVSS score to this CVE (common since the April 2026 policy change).

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.17 %
Percentile among all scored CVEs: 6
Score date: 10/20/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Linux — Linux Kernel^AI

References

Show 4 references

Raw JSON (NVD)

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{
  "id": "CVE-2026-98681",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3bc303c254335dbd7c7012cc1760b12f1d5514d3",
              "lessThan": "3786ee67658a2c80fef2544e7de2cd329e043cf9",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "3bc303c254335dbd7c7012cc1760b12f1d5514d3",
              "lessThan": "4165641d06ef44f3a31b77a28048b6c737e885e7",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "3bc303c254335dbd7c7012cc1760b12f1d5514d3",
              "lessThan": "d9d23d115610e0342e768f6cb525d91c7b154027",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "3bc303c254335dbd7c7012cc1760b12f1d5514d3",
              "lessThan": "19465a9aeb664f1d710d0d22c07c31bfb7c85446",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "fs/smb/client/cifsglob.h"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.32"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "2.6.32",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.12.113",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.56",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.10",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "fs/smb/client/cifsglob.h"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-10-18T16:17:21.457",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/19465a9aeb664f1d710d0d22c07c31bfb7c85446",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/3786ee67658a2c80fef2544e7de2cd329e043cf9",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/4165641d06ef44f3a31b77a28048b6c737e885e7",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d9d23d115610e0342e768f6cb525d91c7b154027",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: split cifsFileInfo bitfields to avoid shared-byte RMW races\n\nThe invalidHandle, swapfile, oplock_break_cancelled, offload,\nand status_file_deleted fields are stored in the same bitfield byte\nin struct cifsFileInfo, but are updated in different code paths that\nmay run simultaneously, and are protected by different locks.  Since\nbitfield assignments generate byte-level read-modify-write operations,\na modification to one flag can overwrite a concurrent modification to\nanother flag.\n\nTo avoid these races, convert these flags from a bitfield to\nseparate bool fields."
    }
  ],
  "lastModified": "2026-10-19T10:19:32.537",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}