CVE-2026-63793 (GCVE-0-2026-63793)

Vulnerability from cvelistv5 – Published: 2026-07-19 12:02 – Updated: 2026-07-20 13:40
VLAI
Title
ntfs: serialize volume label accesses
Summary
In the Linux kernel, the following vulnerability has been resolved: ntfs: serialize volume label accesses Protect vol->volume_label with a mutex and snaphost the label before copy_to_user. This prevent a use-after-free when FS_IOC_SETFSLABEL replaces the vol->volume_label and FS_IOC_GETTSLABEL reads it concurrently.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 9c87959601e80b39a45250e362e6ddfec17cb0fa , < acd744019460bad22e43d4569a502f9c88d331ae (git)
Affected: 9c87959601e80b39a45250e362e6ddfec17cb0fa , < e9e50ce4f13dc721014af622613409455c734942 (git)
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Linux Linux Affected: 7.1
Unaffected: 0 , < 7.1 (semver)
Unaffected: 7.1.3 , ≤ 7.1.* (semver)
Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix)
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{
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            "fs/ntfs/file.c",
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            "fs/ntfs/volume.h"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nntfs: serialize volume label accesses\n\nProtect vol-\u003evolume_label with a mutex and snaphost the label before\ncopy_to_user. This prevent a use-after-free when FS_IOC_SETFSLABEL\nreplaces the vol-\u003evolume_label and FS_IOC_GETTSLABEL reads it\nconcurrently."
        }
      ],
      "metrics": [
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          "cvssV3_1": {
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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      "providerMetadata": {
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-63793",
    "datePublished": "2026-07-19T12:02:02.946Z",
    "dateReserved": "2026-07-19T07:54:57.012Z",
    "dateUpdated": "2026-07-20T13:40:05.579Z",
    "state": "PUBLISHED"
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      "product_status:known_affected": "1",
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      "version": "2"
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    "redhat_vex": {
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      "current_release_date": "2026-07-21T09:07:45+00:00",
      "cve": "CVE-2026-63793",
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      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ntfs: serialize volume label accesses",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-63793.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.