CVE-2026-46008

Local thread hang via DAMON exit race

Published May 27, 2026 · Updated May 27, 2026

Race condition in the DAMON core in Linux Kernel 6.14 through 7.0.3 allows local users to hang a caller thread during context shutdown. damos_walk() can enqueue a request after kdamond_fn() has canceled pending work but before damon_ctx->kdamond is cleared because the operations use different mutexes. A low-privileged local user must reach the DAMON walk API during context termination; the newly queued request is never handled, so only the waiting caller thread hangs.

CVSS severity4.7
Medium
EPSS probability0.08%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in the DAMON core in Linux Kernel 6.14 through 7.0.3 allows local users to hang a caller thread during context shutdown. damos_walk() can enqueue a request after kdamond_fn() has canceled pending work but before damon_ctx->kdamond is cleared because the operations use different mutexes. A low-privileged local user must reach the DAMON walk API during context termination; the newly queued request is never handled, so only the waiting caller thread hangs.

The record

CVE
CVE-2026-46008
Published
May 27, 2026
Updated
May 27, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-362, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 27, 2026CVE publishedPublication date reported by the CVE source.
  2. May 27, 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=bf0eaba0ff9c9c8e6fd58ddfa1a8b6df4b813f61 <0ba956a239ba6e3fae8555d3660e22e675be63b5
  3. Affected versionversion=bf0eaba0ff9c9c8e6fd58ddfa1a8b6df4b813f61 <33c3f6c2b48cd84b441dba1ee3e62290e53930f4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.14; version=bf0eaba0ff9c9c8e6fd58ddfa1a8b6df4b813f61 <0ba956a239ba6e3fae8555d3660e22e675be63b5; version=bf0eaba0ff9c9c8e6fd58ddfa1a8b6df4b813f61 <33c3f6c2b48cd84b441dba1ee3e62290e53930f4

Published CVSS scores

4.7NIST NVDCVSS:3.1/AV:L/AC:H/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 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

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
T1499.004Application or System Exploitation

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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