CVE-2026-46062

Kernel memory corruption via wrapped volume-boundary addition

Published May 27, 2026 · Updated May 27, 2026

Integer overflow in the NTFS3 run_unpack() parser in affected Linux Kernel releases allows attackers to corrupt memory via a crafted volume. The volume-boundary check adds lcn and len without overflow detection, so wraparound lets an invalid cluster range pass validation. Exploitation requires a victim to mount or access the attacker-supplied image or removable media; the bypass permits out-of-bounds reads and writes, filesystem corruption, or a kernel panic.

CVSS severity7.8
High
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in the NTFS3 run_unpack() parser in affected Linux Kernel releases allows attackers to corrupt memory via a crafted volume. The volume-boundary check adds lcn and len without overflow detection, so wraparound lets an invalid cluster range pass validation. Exploitation requires a victim to mount or access the attacker-supplied image or removable media; the bypass permits out-of-bounds reads and writes, filesystem corruption, or a kernel panic.

The record

CVE
CVE-2026-46062
Published
May 27, 2026
Updated
May 27, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-190
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 27, 2026CVE publishedPublication date reported by the CVE source.
  2. May 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.15
  2. Affected versionversion=82cae269cfa953032fbb8980a7d554d60fb00b17 <60dab3e2931f3d792438a77a6cb0cb731c43300b
  3. Affected versionversion=82cae269cfa953032fbb8980a7d554d60fb00b17 <6175d09c23bec4b60860ee9a0170308ff4b56e10
  4. Affected versionversion=82cae269cfa953032fbb8980a7d554d60fb00b17 <984a415f019536ea2d24de9010744e5302a9a948
  5. Affected versionversion=82cae269cfa953032fbb8980a7d554d60fb00b17 <a954061b334ec67c79ae9d0cadd83fa521396487
  6. Affected versionversion=82cae269cfa953032fbb8980a7d554d60fb00b17 <f1af27cec07a9fd0847166bdb23c99e86b05bfdc

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.15; version=82cae269cfa953032fbb8980a7d554d60fb00b17 <60dab3e2931f3d792438a77a6cb0cb731c43300b; version=82cae269cfa953032fbb8980a7d554d60fb00b17 <6175d09c23bec4b60860ee9a0170308ff4b56e10; version=82cae269cfa953032fbb8980a7d554d60fb00b17 <984a415f019536ea2d24de9010744e5302a9a948; version=82cae269cfa953032fbb8980a7d554d60fb00b17 <a954061b334ec67c79ae9d0cadd83fa521396487; version=82cae269cfa953032fbb8980a7d554d60fb00b17 <f1af27cec07a9fd0847166bdb23c99e86b05bfdc

Published CVSS scores

7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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