Skip to main content
CVE-2025-40068VulnerabilityPublished Updated

CVE-2025-40068: Linux hwe edge · In the Linux kernel, the following vulnerability has been resolved: fs: ntfs3: Fix integer overflow in run_unpack() The MFT record relative to the

Affects linux-hwe-edgeSource GCVE Database

0

Not known to be exploited · CVSS 8.4 Medium · fixed in 5.15.0-1110.119~20.04.1 : update linux-hwe-edge when convenient.

Data as of 26 Oct 2026, 06:26 UTC

CVSS 3.1 base score
8.4Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 7% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 5.15.0-1110.119~20.04.1, 5.15.0-1100.109~20.04.1, 5.15.0-1100.107~20.04.2 +2
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 28 Oct 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
linux-hwe-edgeAffected
  • <5.15.0-1100.107~20.04.2
  • <5.15.0-1110.119~20.04.1
  • <5.15.0-1100.109~20.04.1
  • <5.15.0-170.180~20.04.3
  • <5.15.0-1094.97~20.04.1
Fixed in
  • 5.15.0-1100.107~20.04.2
  • 5.15.0-1110.119~20.04.1
  • 5.15.0-1100.109~20.04.1
  • 5.15.0-170.180~20.04.3
  • 5.15.0-1094.97~20.04.1

AI-suggested

A fix has been implemented in the Linux kernel NTFS3 driver by adding an integer overflow check in the run_unpack() function. Users and administrators should apply the official Linux kernel updates that include this fix to mitigate the vulnerability. Patch status is not explicitly confirmed in the provided data; check the vendor or Linux kernel advisories for the specific patched kernel versions.

Description

In the Linux kernel, the following vulnerability has been resolved: fs: ntfs3: Fix integer overflow in run_unpack() The MFT record relative to the file being opened contains its runlist, an array containing information about the file's location on the physical disk. Analysis of all Call Stack paths showed that the values of the runlist array, from which LCNs are calculated, are not validated before run_unpack function. The run_unpack function decodes the compressed runlist data format from MFT attributes (for example, $DATA), converting them into a runs_tree structure, which describes the mapping of virtual clusters (VCN) to logical clusters (LCN). The NTFS3 subsystem also has a shortcut for deleting files from MFT records - in this case, the RUN_DEALLOCATE command is sent to the run_unpack input, and the function logic provides that all data transferred to the runlist about file or directory is deleted without creating a runs_tree structure. Substituting the runlist in the $DATA attribute of the MFT record for an arbitrary file can lead either to access to arbitrary data on the disk bypassing access checks to them (since the inode access check occurs above) or to destruction of arbitrary data on the disk. Add overflow check for addition operation. Found by Linux Verification Center (linuxtesting.org) with SVACE.

References

Community reviews

Loading reviews…