CVE-2025-37760

Local crash via userfaultfd error-pointer misuse

Published May 1, 2025 · Updated May 23, 2026

Invalid pointer handling in affected Linux kernels allows local users to crash the system during userfaultfd release. An allocation failure during VMA commit merging returns an error value that the userfaultfd release path treats as a VMA pointer instead of abandoning the merge without modifying VMAs. Reachability requires low-privileged local access and the allocation-failure condition; the documented consequence is loss of availability without confidentiality or integrity impact.

CVSS severity5.5
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Invalid pointer handling in affected Linux kernels allows local users to crash the system during userfaultfd release. An allocation failure during VMA commit merging returns an error value that the userfaultfd release path treats as a VMA pointer instead of abandoning the merge without modifying VMAs. Reachability requires low-privileged local access and the allocation-failure condition; the documented consequence is loss of availability without confidentiality or integrity impact.

The record

CVE
CVE-2025-37760
Published
May 1, 2025
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 2025CVE publishedPublication date reported by the CVE source.
  2. May 23, 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=47b16d0462a460000b8f05dfb1292377ac48f3ca <41e6ddcaa0f18dda4c3fadf22533775a30d6f72f
  2. Affected versionversion=47b16d0462a460000b8f05dfb1292377ac48f3ca <c103a75c61648203d731e3b97a6fbeea4003cb15
  3. Affected versionversion=53fd215f7886a1e8dea5a9ca1391dbb697fff601
  4. Affected versionversion=6.12.19 <6.12.25
  5. Affected versionversion=6.13.7 <6.14
  6. Affected versionversion=6.14
  7. Affected versionversion=79636d2981b066acd945117387a9533f56411f6f <b906c1ad25adce6ff35be19b65a1aa7d960fe1d7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=47b16d0462a460000b8f05dfb1292377ac48f3ca <41e6ddcaa0f18dda4c3fadf22533775a30d6f72f; version=47b16d0462a460000b8f05dfb1292377ac48f3ca <c103a75c61648203d731e3b97a6fbeea4003cb15; version=53fd215f7886a1e8dea5a9ca1391dbb697fff601; version=6.12.19 <6.12.25; version=6.13.7 <6.14; version=6.14; version=79636d2981b066acd945117387a9533f56411f6f <b906c1ad25adce6ff35be19b65a1aa7d960fe1d7

Published CVSS scores

5.5UbuntuCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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.

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Technologies

Your stack

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Your stack

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