CVE-2026-33565

Local service interruption via signal-handler race

Published May 19, 2026 · Updated May 19, 2026

Signal-handler race in OpenHarmony 5.0.3 through 6.0 allows local users with low privileges to interrupt service availability. OpenHarmony identifies kernel_linux_common_modules as the affected component but has not published the signal handler, shared state, or incorrect operation involved. Exploitation requires local low-privilege access and causes only a limited service interruption, with no reported confidentiality or integrity impact.

CVSS severity3.3
Low
EPSS probability0.09%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Signal-handler race in OpenHarmony 5.0.3 through 6.0 allows local users with low privileges to interrupt service availability. OpenHarmony identifies kernel_linux_common_modules as the affected component but has not published the signal handler, shared state, or incorrect operation involved. Exploitation requires local low-privilege access and causes only a limited service interruption, with no reported confidentiality or integrity impact.

The record

CVE
CVE-2026-33565
Published
May 19, 2026
Updated
May 19, 2026
Vendor
OpenHarmony
Product
OpenHarmony
Classifications
CWE-364, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 19, 2026CVE publishedPublication date reported by the CVE source.
  2. May 19, 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=v5.0.3 <=v6.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

OpenHarmony · OpenHarmonyversion=v5.0.3 <=v6.0

Published CVSS scores

3.3OpenHarmonyCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

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-364Signal Handler 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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