CVE-2026-45935

Kernel memory corruption via oversized NTFS3 journal entry

Published May 27, 2026 · Updated May 27, 2026

Heap overflow in the Linux Kernel NTFS3 driver allows attackers to corrupt kernel memory via crafted NTFS journal records. DeleteIndexEntryRoot trusts the log record's esize, advances e2 beyond the used index buffer, and converts a negative PtrOffset result into a massive memmove length. A victim must mount the attacker-supplied NTFS filesystem; journal replay then reads and writes out of bounds and reliably causes a kernel oops or panic.

CVSS severity7.8
High
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap overflow in the Linux Kernel NTFS3 driver allows attackers to corrupt kernel memory via crafted NTFS journal records. DeleteIndexEntryRoot trusts the log record's esize, advances e2 beyond the used index buffer, and converts a negative PtrOffset result into a massive memmove length. A victim must mount the attacker-supplied NTFS filesystem; journal replay then reads and writes out of bounds and reliably causes a kernel oops or panic.

The record

CVE
CVE-2026-45935
Published
May 27, 2026
Updated
May 27, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-125, T1204.002
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=b46acd6a6a627d876898e1c84d3f84902264b445 <36c03f7f177b34d51f1cf1d2304b1074607bf4b0
  3. Affected versionversion=b46acd6a6a627d876898e1c84d3f84902264b445 <78942172d5bff4d4afed8674abc09cc560ce44a0
  4. Affected versionversion=b46acd6a6a627d876898e1c84d3f84902264b445 <a584b9d1059b29e97e17c919274e9adfb846f2a0
  5. Affected versionversion=b46acd6a6a627d876898e1c84d3f84902264b445 <b271c9cb85927210b1b799e55ee7f702d12b4336
  6. Affected versionversion=b46acd6a6a627d876898e1c84d3f84902264b445 <b2bc7c44ed1779fc9eaab9a186db0f0d01439622
  7. Affected versionversion=b46acd6a6a627d876898e1c84d3f84902264b445 <c065541b71b79874c83d418a9acd18ad5826339b
  8. Affected versionversion=b46acd6a6a627d876898e1c84d3f84902264b445 <f3b437a4c3e022a1449658ae9f3dd34859894513

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.15; version=b46acd6a6a627d876898e1c84d3f84902264b445 <36c03f7f177b34d51f1cf1d2304b1074607bf4b0; version=b46acd6a6a627d876898e1c84d3f84902264b445 <78942172d5bff4d4afed8674abc09cc560ce44a0; version=b46acd6a6a627d876898e1c84d3f84902264b445 <a584b9d1059b29e97e17c919274e9adfb846f2a0; version=b46acd6a6a627d876898e1c84d3f84902264b445 <b271c9cb85927210b1b799e55ee7f702d12b4336; version=b46acd6a6a627d876898e1c84d3f84902264b445 <b2bc7c44ed1779fc9eaab9a186db0f0d01439622; version=b46acd6a6a627d876898e1c84d3f84902264b445 <c065541b71b79874c83d418a9acd18ad5826339b; version=b46acd6a6a627d876898e1c84d3f84902264b445 <f3b437a4c3e022a1449658ae9f3dd34859894513

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1204.002User Execution: Malicious File

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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