CVE-2022-50053

Host hang via double NAPI disable

Published Jun 18, 2025 · Updated May 11, 2026

Improper locking in affected Linux kernels allows local users to hang iavf virtual-function removal after rapid VF resets. In iavf_reset_task, mailbox setup failure calls iavf_close, which invokes napi_disable twice and deadlocks while holding crit_lock. Reaching the flaw requires local privileges to trigger rapid SR-IOV VF resets and a hardware mailbox setup failure; removal then blocks and the hung-task watchdog can panic the host.

CVSS severity5.5
Medium
EPSS probability0.13%
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 affected Linux kernels allows local users to hang iavf virtual-function removal after rapid VF resets. In iavf_reset_task, mailbox setup failure calls iavf_close, which invokes napi_disable twice and deadlocks while holding crit_lock. Reaching the flaw requires local privileges to trigger rapid SR-IOV VF resets and a hardware mailbox setup failure; removal then blocks and the hung-task watchdog can panic the host.

The record

CVE
CVE-2022-50053
Published
Jun 18, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-667, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 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=4.14
  2. Affected versionversion=f0db78928783f0a4cce4940e8c03c2e9a760e629 <0828e27971f18ea317710acb228afe6e72606082
  3. Affected versionversion=f0db78928783f0a4cce4940e8c03c2e9a760e629 <31071173771e079f7bc08dacd61e0db913262fbf
  4. Affected versionversion=f0db78928783f0a4cce4940e8c03c2e9a760e629 <743dc4377bbac06a6fe44c3c5baf75a49439678a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.14; version=f0db78928783f0a4cce4940e8c03c2e9a760e629 <0828e27971f18ea317710acb228afe6e72606082; version=f0db78928783f0a4cce4940e8c03c2e9a760e629 <31071173771e079f7bc08dacd61e0db913262fbf; version=f0db78928783f0a4cce4940e8c03c2e9a760e629 <743dc4377bbac06a6fe44c3c5baf75a49439678a

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-667Improper Locking
T1499Endpoint Denial of Service

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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