CVE-2022-49584

Kernel panic via unlocked SR-IOV teardown race

Published Feb 26, 2025 · Updated May 11, 2026

Improper locking in the Linux ixgbe driver allows local users to crash the kernel by disabling SR-IOV virtual functions. The disable path can tear down virtual-function state while ixgbe_msg_task processes a VF mailbox request because those operations lack shared synchronization. The condition requires an ixgbe physical function with enabled virtual functions and local access capable of changing sriov_numvfs; the bounded consequence is a kernel panic and host service interruption.

CVSS severity5.5
Medium
EPSS probability0.20%
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 ixgbe driver allows local users to crash the kernel by disabling SR-IOV virtual functions. The disable path can tear down virtual-function state while ixgbe_msg_task processes a VF mailbox request because those operations lack shared synchronization. The condition requires an ixgbe physical function with enabled virtual functions and local access capable of changing sriov_numvfs; the bounded consequence is a kernel panic and host service interruption.

The record

CVE
CVE-2022-49584
Published
Feb 26, 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. Feb 26, 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

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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=3.6
  2. Affected versionversion=d773d1310625be3b040b436178ad59a0af8888f1 <031af9e617a6f51075d97e56fc9e712c7dde2508
  3. Affected versionversion=d773d1310625be3b040b436178ad59a0af8888f1 <16f929a5e76fd047fd8697e1e568bdd7d771955c
  4. Affected versionversion=d773d1310625be3b040b436178ad59a0af8888f1 <1e53834ce541d4fe271cdcca7703e50be0a44f8a
  5. Affected versionversion=d773d1310625be3b040b436178ad59a0af8888f1 <9d925d2dc82cec2bcbd8625457645d8a548ab22e
  6. Affected versionversion=d773d1310625be3b040b436178ad59a0af8888f1 <b82de63f8f817b5735480293dda8e92ba8170c52

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.6; version=d773d1310625be3b040b436178ad59a0af8888f1 <031af9e617a6f51075d97e56fc9e712c7dde2508; version=d773d1310625be3b040b436178ad59a0af8888f1 <16f929a5e76fd047fd8697e1e568bdd7d771955c; version=d773d1310625be3b040b436178ad59a0af8888f1 <1e53834ce541d4fe271cdcca7703e50be0a44f8a; version=d773d1310625be3b040b436178ad59a0af8888f1 <9d925d2dc82cec2bcbd8625457645d8a548ab22e; version=d773d1310625be3b040b436178ad59a0af8888f1 <b82de63f8f817b5735480293dda8e92ba8170c52

Published CVSS scores

5.5NIST National Vulnerability DatabaseCVSS: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 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
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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