CVE-2026-68146

Trace parser corruption via concurrent descriptor writes

Published Aug 10, 2026 · Updated Aug 10, 2026

A race condition in Linux kernel ftrace allows local users to corrupt parser input by concurrently writing through one shared trace descriptor. The write and release handlers access the trace_parser idx, cont, and buffer fields without serialization, allowing threads to corrupt shared parsing state. Reaching these handlers requires local access to writable ftrace control files, and the documented consequence is corrupted input or undefined behavior.

CVSS severityUnavailable
Unscored
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A race condition in Linux kernel ftrace allows local users to corrupt parser input by concurrently writing through one shared trace descriptor. The write and release handlers access the trace_parser idx, cont, and buffer fields without serialization, allowing threads to corrupt shared parsing state. Reaching these handlers requires local access to writable ftrace control files, and the documented consequence is corrupted input or undefined behavior.

The record

CVE
CVE-2026-68146
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 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=2.6.32
  2. Affected versionversion=689fd8b65d669b96d612ccc37d6fb87bf7ed6907 <3d0dd138a06c782f8b755cd1b6f9909494514ce1
  3. Affected versionversion=689fd8b65d669b96d612ccc37d6fb87bf7ed6907 <65bf73bee1a4f3722208ae46afc0fa5de76b9a0a
  4. Affected versionversion=689fd8b65d669b96d612ccc37d6fb87bf7ed6907 <7720b63bcef3f54c7fe288774b720a227d54a306
  5. Affected versionversion=689fd8b65d669b96d612ccc37d6fb87bf7ed6907 <90be137813e1a5bdfd671e40fe28004fb959d3e4
  6. Affected versionversion=689fd8b65d669b96d612ccc37d6fb87bf7ed6907 <e807c9193d9493c7a0d039158ebb955050a76df1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.32; version=689fd8b65d669b96d612ccc37d6fb87bf7ed6907 <3d0dd138a06c782f8b755cd1b6f9909494514ce1; version=689fd8b65d669b96d612ccc37d6fb87bf7ed6907 <65bf73bee1a4f3722208ae46afc0fa5de76b9a0a; version=689fd8b65d669b96d612ccc37d6fb87bf7ed6907 <7720b63bcef3f54c7fe288774b720a227d54a306; version=689fd8b65d669b96d612ccc37d6fb87bf7ed6907 <90be137813e1a5bdfd671e40fe28004fb959d3e4; version=689fd8b65d669b96d612ccc37d6fb87bf7ed6907 <e807c9193d9493c7a0d039158ebb955050a76df1

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.

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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
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

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Your stack

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