CVE-2025-38311

System hang via iavf circular lock dependency

Published Jul 10, 2025 · Updated May 23, 2026

Improper locking in the Linux iavf driver allows local users to hang the system by triggering a deadlock during virtual-function removal. The iavf_remove() path cancels work while lock dependencies involving crit_lock, the netdev lock, and the iavf workqueue form a circular wait. Exploitation requires local low-privileged access and an active iavf virtual-function device; successful triggering interrupts the affected host until recovery.

CVSS severity5.5
Medium
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper locking in the Linux iavf driver allows local users to hang the system by triggering a deadlock during virtual-function removal. The iavf_remove() path cancels work while lock dependencies involving crit_lock, the netdev lock, and the iavf workqueue form a circular wait. Exploitation requires local low-privileged access and an active iavf virtual-function device; successful triggering interrupts the affected host until recovery.

The record

CVE
CVE-2025-38311
Published
Jul 10, 2025
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-667, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 10, 2025CVE publishedPublication date reported by the CVE source.
  2. May 23, 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=2647ff59c52ef42c853c905817ed1a7f092d59a5
  2. Affected versionversion=6.1.42 <6.2
  3. Affected versionversion=63d14a43128540016ebd4f7fa3ad3a2f0d6e642c
  4. Affected versionversion=6.4.7 <6.5
  5. Affected versionversion=6.5
  6. Affected versionversion=d1639a17319ba78a018280cd2df6577a7e5d9fab <120f28a6f314fef7f282c99f196923fe44081cad
  7. Affected versionversion=d1639a17319ba78a018280cd2df6577a7e5d9fab <620ab4d6215de0b25227f9fff1a8c7fb66837cb8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2647ff59c52ef42c853c905817ed1a7f092d59a5; version=6.1.42 <6.2; version=63d14a43128540016ebd4f7fa3ad3a2f0d6e642c; version=6.4.7 <6.5; version=6.5; version=d1639a17319ba78a018280cd2df6577a7e5d9fab <120f28a6f314fef7f282c99f196923fe44081cad; version=d1639a17319ba78a018280cd2df6577a7e5d9fab <620ab4d6215de0b25227f9fff1a8c7fb66837cb8

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Canonical UbuntuCVSS: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-667Improper Locking
T1499.004Endpoint Denial of Service: Application 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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