CVE-2025-40137

Kernel crash via retained page-cache folio

Published Nov 12, 2025 · Updated May 11, 2026

Denial of service in Linux kernel F2FS allows attackers to crash the kernel by mounting a malformed filesystem image. During f2fs_truncate(), f2fs_convert_inline_inode() creates page zero in the cache, but an -EFSCORRUPTED return leaves that folio behind for inode eviction. Reaching the fault requires the ability to mount attacker-controlled F2FS storage; clear_inode() then encounters a nonempty page cache and triggers a kernel BUG, interrupting the host.

CVSS severityUnavailable
Unscored
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Denial of service in Linux kernel F2FS allows attackers to crash the kernel by mounting a malformed filesystem image. During f2fs_truncate(), f2fs_convert_inline_inode() creates page zero in the cache, but an -EFSCORRUPTED return leaves that folio behind for inode eviction. Reaching the fault requires the ability to mount attacker-controlled F2FS storage; clear_inode() then encounters a nonempty page cache and triggers a kernel BUG, interrupting the host.

The record

CVE
CVE-2025-40137
Published
Nov 12, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Nov 12, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=3.19
  2. Affected versionversion=92dffd01790a5219d234fc83c3ba854f4490b7f4 <3b0c8908faa18cded84d64822882a830ab1f4d26
  3. Affected versionversion=92dffd01790a5219d234fc83c3ba854f4490b7f4 <83a8e4efea022506a0e049e7206bdf8be9f78148
  4. Affected versionversion=92dffd01790a5219d234fc83c3ba854f4490b7f4 <9251a9e6e871cb03c4714a18efa8f5d4a8818450
  5. Affected versionversion=92dffd01790a5219d234fc83c3ba854f4490b7f4 <a7b7ebdd7045a36454b3e388a2ecf50344fad9e6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=3.19; version=92dffd01790a5219d234fc83c3ba854f4490b7f4 <3b0c8908faa18cded84d64822882a830ab1f4d26; version=92dffd01790a5219d234fc83c3ba854f4490b7f4 <83a8e4efea022506a0e049e7206bdf8be9f78148; version=92dffd01790a5219d234fc83c3ba854f4490b7f4 <9251a9e6e871cb03c4714a18efa8f5d4a8818450; version=92dffd01790a5219d234fc83c3ba854f4490b7f4 <a7b7ebdd7045a36454b3e388a2ecf50344fad9e6

Published CVSS scores

No CVSS assessment is available in this record.

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

Weakness, pattern, technique

No sourced classifications are available.

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo