CVE-2025-37923

Local kernel compromise via trace buffer overflow

Published May 20, 2025 · Updated Aug 5, 2026

Out-of-bounds write in affected Linux kernels allows local users with tracefs access to corrupt kernel memory through trace_pipe. trace_seq_to_buffer copies the trace sequence's used length into a single PAGE_SIZE buffer without capping the copy, so splice writes past the allocated page. Reachability depends on tracefs inode permissions; exploitation can disclose adjacent kernel memory, corrupt it, or crash the system.

CVSS severity7.8
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in affected Linux kernels allows local users with tracefs access to corrupt kernel memory through trace_pipe. trace_seq_to_buffer copies the trace sequence's used length into a single PAGE_SIZE buffer without capping the copy, so splice writes past the allocated page. Reachability depends on tracefs inode permissions; exploitation can disclose adjacent kernel memory, corrupt it, or crash the system.

The record

CVE
CVE-2025-37923
Published
May 20, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 20, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=2.6.30
  2. Affected versionversion=3c56819b14b00dd449bd776303e61f8532fad09f <056ebbddb8faf4ddf83d005454dd78fc25c2d897
  3. Affected versionversion=3c56819b14b00dd449bd776303e61f8532fad09f <1a3f9482b50b74fa9421bff8ceecfefd0dc06f8f
  4. Affected versionversion=3c56819b14b00dd449bd776303e61f8532fad09f <1f27a3e93b8d674b24b27fcdbc6f72743cd96c0d
  5. Affected versionversion=3c56819b14b00dd449bd776303e61f8532fad09f <441021e5b3c7d9bd1b963590652c415929f3b157
  6. Affected versionversion=3c56819b14b00dd449bd776303e61f8532fad09f <665ce421041890571852422487f4c613d1824ba9
  7. Affected versionversion=3c56819b14b00dd449bd776303e61f8532fad09f <c5d2b66c5ef5037b4b4360e5447605ff00ba1bd4
  8. Affected versionversion=3c56819b14b00dd449bd776303e61f8532fad09f <f4b0174e9f18aaba59ee6ffdaf8827a7f94eb606
  9. Affected versionversion=3c56819b14b00dd449bd776303e61f8532fad09f <f5178c41bb43444a6008150fe6094497135d07cb

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.30; version=3c56819b14b00dd449bd776303e61f8532fad09f <056ebbddb8faf4ddf83d005454dd78fc25c2d897; version=3c56819b14b00dd449bd776303e61f8532fad09f <1a3f9482b50b74fa9421bff8ceecfefd0dc06f8f; version=3c56819b14b00dd449bd776303e61f8532fad09f <1f27a3e93b8d674b24b27fcdbc6f72743cd96c0d; version=3c56819b14b00dd449bd776303e61f8532fad09f <441021e5b3c7d9bd1b963590652c415929f3b157; version=3c56819b14b00dd449bd776303e61f8532fad09f <665ce421041890571852422487f4c613d1824ba9; version=3c56819b14b00dd449bd776303e61f8532fad09f <c5d2b66c5ef5037b4b4360e5447605ff00ba1bd4; version=3c56819b14b00dd449bd776303e61f8532fad09f <f4b0174e9f18aaba59ee6ffdaf8827a7f94eb606; version=3c56819b14b00dd449bd776303e61f8532fad09f <f5178c41bb43444a6008150fe6094497135d07cb

Published CVSS scores

7.8LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.0Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/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 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

T1068Exploitation for Privilege Escalation

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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