CVE-2025-38182

Local kernel impact via unchecked ublk dimensions

Published Jul 4, 2025 · Updated May 11, 2026

Improper input validation in the Linux kernel ublk driver from 6.0 allows local users to affect confidentiality, integrity, and availability. The ublk_ctrl_add_dev function copies device information from userspace but fails to reject queue_depth or nr_hw_queues values above defined maxima. Low-privileged local access to the ublk device-add control path is required; upstream sources do not describe the resulting corruption or failure mode.

CVSS severity7.8
High
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper input validation in the Linux kernel ublk driver from 6.0 allows local users to affect confidentiality, integrity, and availability. The ublk_ctrl_add_dev function copies device information from userspace but fails to reject queue_depth or nr_hw_queues values above defined maxima. Low-privileged local access to the ublk device-add control path is required; upstream sources do not describe the resulting corruption or failure mode.

The record

CVE
CVE-2025-38182
Published
Jul 4, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 4, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record 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=6.0
  2. Affected versionversion=71f28f3136aff5890cd56de78abc673f8393cad9 <0f8df5d6f25ac17c52a8bc6418e60a3e63130550
  3. Affected versionversion=71f28f3136aff5890cd56de78abc673f8393cad9 <3162d8235c8c4d585525cee8a59d1c180940a968
  4. Affected versionversion=71f28f3136aff5890cd56de78abc673f8393cad9 <8c8472855884355caf3d8e0c50adf825f83454b2
  5. Affected versionversion=71f28f3136aff5890cd56de78abc673f8393cad9 <e2b2b7cf6368580114851cb3932f2ad9fbf23386

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.0; version=71f28f3136aff5890cd56de78abc673f8393cad9 <0f8df5d6f25ac17c52a8bc6418e60a3e63130550; version=71f28f3136aff5890cd56de78abc673f8393cad9 <3162d8235c8c4d585525cee8a59d1c180940a968; version=71f28f3136aff5890cd56de78abc673f8393cad9 <8c8472855884355caf3d8e0c50adf825f83454b2; version=71f28f3136aff5890cd56de78abc673f8393cad9 <e2b2b7cf6368580114851cb3932f2ad9fbf23386

Published CVSS scores

7.8CanonicalCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.6Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/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

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo