CVE-2025-37925

Kernel crash via unsupported JFS inode type

Published Apr 18, 2025 · Updated May 11, 2026

Denial of service in Linux JFS allows local users to crash an affected kernel by mounting a crafted filesystem image. copy_from_dinode() accepts reserved on-disk inode types 5 through 15, so clear_inode() later finalizes an unsupported inode and reaches a kernel BUG. Exploitation requires local access sufficient to present and mount malformed JFS media; the demonstrated consequence is a kernel crash, not data disclosure or code execution.

CVSS severity5.5
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Linux JFS allows local users to crash an affected kernel by mounting a crafted filesystem image. copy_from_dinode() accepts reserved on-disk inode types 5 through 15, so clear_inode() later finalizes an unsupported inode and reaches a kernel BUG. Exploitation requires local access sufficient to present and mount malformed JFS media; the demonstrated consequence is a kernel crash, not data disclosure or code execution.

The record

CVE
CVE-2025-37925
Published
Apr 18, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 18, 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=3.1
  2. Affected versionversion=79ac5a46c5c1c17476fbf84b4d4600d6d565defd <28419a4f3a1eeee33472a1b3856ae62aaa5a649b
  3. Affected versionversion=79ac5a46c5c1c17476fbf84b4d4600d6d565defd <45fd8421081ec79e661e5f3ead2934fdbddb4287
  4. Affected versionversion=79ac5a46c5c1c17476fbf84b4d4600d6d565defd <8987891c4653874d5e3f5d11f063912f4e0b58eb
  5. Affected versionversion=79ac5a46c5c1c17476fbf84b4d4600d6d565defd <8c3f9a70d2d4dd6c640afe294b05c6a0a45434d9
  6. Affected versionversion=79ac5a46c5c1c17476fbf84b4d4600d6d565defd <afc08b0b5587b553799bc375957706936a3e0088
  7. Affected versionversion=79ac5a46c5c1c17476fbf84b4d4600d6d565defd <fa6ce4a9cc9fcc8150b80db6f65186c0ed2b3143

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.1; version=79ac5a46c5c1c17476fbf84b4d4600d6d565defd <28419a4f3a1eeee33472a1b3856ae62aaa5a649b; version=79ac5a46c5c1c17476fbf84b4d4600d6d565defd <45fd8421081ec79e661e5f3ead2934fdbddb4287; version=79ac5a46c5c1c17476fbf84b4d4600d6d565defd <8987891c4653874d5e3f5d11f063912f4e0b58eb; version=79ac5a46c5c1c17476fbf84b4d4600d6d565defd <8c3f9a70d2d4dd6c640afe294b05c6a0a45434d9; version=79ac5a46c5c1c17476fbf84b4d4600d6d565defd <afc08b0b5587b553799bc375957706936a3e0088; version=79ac5a46c5c1c17476fbf84b4d4600d6d565defd <fa6ce4a9cc9fcc8150b80db6f65186c0ed2b3143

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

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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