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CVE-2025-68365 (GCVE-0-2025-68365)

Vulnerability from cvelistv5 – Published: 2025-12-24 10:32 – Updated: 2026-08-05 12:11
VLAI
Title
fs/ntfs3: Initialize allocated memory before use
Summary
In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: Initialize allocated memory before use KMSAN reports: Multiple uninitialized values detected: - KMSAN: uninit-value in ntfs_read_hdr (3) - KMSAN: uninit-value in bcmp (3) Memory is allocated by __getname(), which is a wrapper for kmem_cache_alloc(). This memory is used before being properly cleared. Change kmem_cache_alloc() to kmem_cache_zalloc() to properly allocate and clear memory before use.
Severity
8.2 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 82cae269cfa953032fbb8980a7d554d60fb00b17 , < bdf38063fd15f2fc7361dc0b5d3c259741eab835 (git)
Affected: 82cae269cfa953032fbb8980a7d554d60fb00b17 , < a58e29849aef8d26554a982989a2190b49aaf8ed (git)
Affected: 82cae269cfa953032fbb8980a7d554d60fb00b17 , < 7d52c592cf53f5bb7163967edc01d2d7d80de44a (git)
Affected: 82cae269cfa953032fbb8980a7d554d60fb00b17 , < f7728057220cabd720e27e46097edad48e5bd728 (git)
Affected: 82cae269cfa953032fbb8980a7d554d60fb00b17 , < 192e8ce302f14ac66259231dd10cede19858d742 (git)
Affected: 82cae269cfa953032fbb8980a7d554d60fb00b17 , < a8a3ca23bbd9d849308a7921a049330dc6c91398 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.15
Unaffected: 0 , < 5.15 (semver)
Unaffected: 5.15.199 , ≤ 5.15.* (semver)
Unaffected: 6.1.162 , ≤ 6.1.* (semver)
Unaffected: 6.6.122 , ≤ 6.6.* (semver)
Unaffected: 6.12.68 , ≤ 6.12.* (semver)
Unaffected: 6.18.2 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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              "value": "AV:N - NTFS3 supports NFS exports, while ksmbd CREATE, hard-link, and directory-enumeration requests also reach these vulnerable operations through the VFS. A writable NTFS3-backed network share is therefore remotely triggerable.\nAC:L - The attacker controls filenames, operation ordering, and subsequent enumeration or writeback triggers; no race or uncontrollable condition is required. Crafted metadata and alignment-padding leakage can be reproduced deterministically.\nPR:N - A guest-writable ksmbd share or anonymous/AUTH_SYS NFS export can invoke the path without authenticated credentials. The path requires only mapped filesystem permissions, not kernel capabilities.\nUI:N - Once the NTFS3 volume is mounted and exported, attacker requests trigger the vulnerability without any victim action.\nS:U - The vulnerable filesystem code and the affected kernel memory and availability remain under the same host-kernel security authority.\nC:L - Uninitialized NTFS_DUP_INFO fields and up to seven alignment bytes containing stale names-cache heap data can be persisted in NTFS metadata and read back. This is a bounded disclosure rather than an arbitrary-memory read.\nI:N - The copies remain within allocated directory records and provide no out-of-bounds write, use-after-free, or attacker-controlled write primitive. Uninitialized values affect comparisons and duplicate metadata only.\nA:H - The demonstrated uninitialized-value BUG paths occur during directory enumeration and inode writeback and can panic the kernel when warnings are fatal. The triggering operations can be repeated remotely against an exposed writable share."
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-13T17:54:40+00:00",
      "cve": "CVE-2025-68365",
      "id": "CVE-2025-68365",
      "initial_release_date": "2025-12-24T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel: NTFS3 uninitialized memory vulnerability allows information disclosure and denial of service.",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-68365.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.


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