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Linux KernelOperating system · Linux

CVE-2026-46072

MEDIUM · 5.5 CVSS v3.1 Published 2026-05-27
Fix available
A fix is available. Upgrade to 5.15.209 / 6.1.175 or later.
See remediation →
57/100
Remediation priority · Elevated
Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
In the Linux kernel, the following vulnerability has been resolved: ntfs3: add buffer boundary checks to run_unpack() run_unpack() checks `run_buf < run_last` at the top of the while loop but then reads size_size and offset_size bytes via run_unpack_s64() without verifying they fit within the remaining buffer. A crafted NTFS image with truncated run data in an MFT attribute triggers an OOB heap read of up to 15 bytes when the filesystem is mounted. Add boundary checks before each run_unpack_s64() call to ensure the declared field size does not exceed the remaining buffer. Found by fuzzing with a source-patched harness (LibAFL + QEMU).

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis

A detailed technical summary for this CVE is being prepared.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Linux KernelOperating system
Affected:>= 5.15, < 5.15.209>= 5.16, < 6.1.175>= 6.2, < 6.6.140>= 6.7, < 6.12.86>= 6.13, < 6.18.27>= 6.19, < 7.0.4

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 5.15.209 / 6.1.175 / 6.6.140 or later
Fixed in 5.15.2096.1.1756.6.140
Vendor patch git.kernel.org →
Recommended fix High confidence

Upgrade to kernel version >= 5.15.209 (for 5.15.x), >= 6.1.175 (for 6.1.x), >= 6.6.140 (for 6.6.x), or >= 6.12.86 (for 6.7-6.12.x). Recommend moving to the latest stable kernel available for your distribution.

  1. 1. Check the currently running kernel version: uname -r
  2. 2. Identify your Linux distribution and version (e.g., cat /etc/os-release)
  3. 3. Update your package repository to ensure you have access to the latest kernel packages
  4. 4. For Debian/Ubuntu: apt-get update && apt-get install linux-image-<version>
  5. 5. For RHEL/CentOS/Fedora: dnf update kernel or yum update kernel
  6. 6. For SUSE: zypper patch or zypper update kernel-default
  7. 7. After installation, reboot the system to load the patched kernel: systemctl reboot
  8. 8. Verify the kernel has been updated and the vulnerability is addressed: uname -r and check that version is >= the fixed release for your branch
Caveat Kernel upgrades may introduce compatibility issues with custom drivers or older user-space tools. Ensure critical kernel modules are compatible and back up important data before rebooting.

Generated from the published advisory — verify against the referenced sources before acting.

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $1,600. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-46072 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
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