CVE-2025-46158Public exploit

System crash via zero-sized timer chunk division

Published Jun 20, 2025 · Updated Jun 26, 2025

Divide-by-zero in the Redox OS 0.8.0 kernel allows local users to crash the operating system through a crafted setitimer call. The unimplemented itimer scheme passes attacker-controlled timer data through in_exact_chunks, where specific time arguments produce a zero-sized chunk divisor and panic the kernel. Any local process able to invoke setitimer can trigger the crash; no confidentiality or integrity impact is reported.

CVSS severity6.2
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Divide-by-zero in the Redox OS 0.8.0 kernel allows local users to crash the operating system through a crafted setitimer call. The unimplemented itimer scheme passes attacker-controlled timer data through in_exact_chunks, where specific time arguments produce a zero-sized chunk divisor and panic the kernel. Any local process able to invoke setitimer can trigger the crash; no confidentiality or integrity impact is reported.

The record

CVE
CVE-2025-46158
Published
Jun 20, 2025
Updated
Jun 26, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-369, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 20, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 26, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.2CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-369Divide By Zero
T1499.004Application or System Exploitation

Public exploit references

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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