CVE-2025-38564

Local service interruption via failed perf buffer mapping

Published Aug 19, 2025 · Updated May 11, 2026

Resource leak in perf/core in Linux 6.14, 6.15 before 6.15.10, and 6.16 before 6.16.1 allows local users to interrupt service. On a map_range() failure, perf_mmap() removes page-table entries but skips perf_mmap_close(), leaking references, corrupting user->vm accounting, and unbalancing event_mapped() callbacks. The path requires local low-privileged access and a failed mapping; published impact is limited to availability rather than data disclosure or modification.

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

What happened

Resource leak in perf/core in Linux 6.14, 6.15 before 6.15.10, and 6.16 before 6.16.1 allows local users to interrupt service. On a map_range() failure, perf_mmap() removes page-table entries but skips perf_mmap_close(), leaking references, corrupting user->vm accounting, and unbalancing event_mapped() callbacks. The path requires local low-privileged access and a failed mapping; published impact is limited to availability rather than data disclosure or modification.

The record

CVE
CVE-2025-38564
Published
Aug 19, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 19, 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

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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=6.14
  2. Affected versionversion=b709eb872e19a19607bbb6d2975bc264d59735cf <831e1c90a5d72e6977a57c44f47c46b73a438695
  3. Affected versionversion=b709eb872e19a19607bbb6d2975bc264d59735cf <a9025f73c88d9d6e125743a43afc569da3ce5328
  4. Affected versionversion=b709eb872e19a19607bbb6d2975bc264d59735cf <f74b9f4ba63ffdf597aaaa6cad7e284cb8e04820

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.14; version=b709eb872e19a19607bbb6d2975bc264d59735cf <831e1c90a5d72e6977a57c44f47c46b73a438695; version=b709eb872e19a19607bbb6d2975bc264d59735cf <a9025f73c88d9d6e125743a43afc569da3ce5328; version=b709eb872e19a19607bbb6d2975bc264d59735cf <f74b9f4ba63ffdf597aaaa6cad7e284cb8e04820

Published CVSS scores

5.5CanonicalCVSS: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.

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
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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