CVE-2022-48864

Host kernel panic via unchecked queue-pair command

Published Jul 16, 2024 · Updated Aug 5, 2026

Use of an uninitialized resource in the mlx5 vDPA backend allows local users to panic the host kernel through a crafted queue command. The control-virtqueue handler accepts VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET without verifying multiqueue negotiation or bounding the requested pair count, then operates on uninitialized queue resources. Reachability requires control of an untrusted vDPA driver, and successful triggering interrupts the host kernel service.

CVSS severity8.8
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use of an uninitialized resource in the mlx5 vDPA backend allows local users to panic the host kernel through a crafted queue command. The control-virtqueue handler accepts VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET without verifying multiqueue negotiation or bounding the requested pair count, then operates on uninitialized queue resources. Reachability requires control of an untrusted vDPA driver, and successful triggering interrupts the host kernel service.

The record

CVE
CVE-2022-48864
Published
Jul 16, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-908, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 16, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=5.15
  2. Affected versionversion=52893733f2c5886fc74be6c386d12b59a3f581df <9f6effca75626c7a7c7620dabcb1a254ca530230
  3. Affected versionversion=52893733f2c5886fc74be6c386d12b59a3f581df <e7e118416465f2ba8b55007e5b789823e101421e
  4. Affected versionversion=52893733f2c5886fc74be6c386d12b59a3f581df <ed0f849fc3a63ed2ddf5e72cdb1de3bdbbb0f8eb

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.15; version=52893733f2c5886fc74be6c386d12b59a3f581df <9f6effca75626c7a7c7620dabcb1a254ca530230; version=52893733f2c5886fc74be6c386d12b59a3f581df <e7e118416465f2ba8b55007e5b789823e101421e; version=52893733f2c5886fc74be6c386d12b59a3f581df <ed0f849fc3a63ed2ddf5e72cdb1de3bdbbb0f8eb

Published CVSS scores

8.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
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 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-908Use of Uninitialized Resource
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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