CVE-2025-39940

Service interruption via wrapped dm-stripe queue limits

Published Oct 4, 2025 · Updated Oct 4, 2025

Integer overflow in dm-stripe in affected Linux kernel builds allows local users to interrupt service via an oversized chunk size. stripe_io_hints shifts the configured sector count and multiplies it by the stripe count in unsigned integers, then assigns wrapped results to io_min and io_opt. Local access and control of a dm-stripe target are required, and the published impact is limited to availability.

CVSS severity5.5
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in dm-stripe in affected Linux kernel builds allows local users to interrupt service via an oversized chunk size. stripe_io_hints shifts the configured sector count and multiplies it by the stripe count in unsigned integers, then assigns wrapped results to io_min and io_opt. Local access and control of a dm-stripe target are required, and the published impact is limited to availability.

The record

CVE
CVE-2025-39940
Published
Oct 4, 2025
Updated
Oct 4, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-190, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 4, 2025Record 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1071d560afb4c245c2076494226df47db5a35708
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ee27658c239b27721397f3e4eb16370b5cce596e
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f8f64254bca5ae58f3b679441962bda4c409f659

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1071d560afb4c245c2076494226df47db5a35708; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ee27658c239b27721397f3e4eb16370b5cce596e; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f8f64254bca5ae58f3b679441962bda4c409f659

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/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.

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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

CWE-190Integer Overflow or Wraparound
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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