CVE-2022-49201

Kernel crash via transmit-reset queue race

Published Feb 26, 2025 · Updated Aug 5, 2026

A race in the Linux kernel ibmvnic driver allows local users to crash affected systems during concurrent transmit and reset. During reset, ibmvnic_complete_tx can restart a stopped transmit queue, letting ibmvnic_xmit dereference tx_scrq after the reset path frees or nulls it. Exploitation requires local low-privileged access, an active IBM virtual NIC, and precise overlap between queue completion and reset; the bounded consequence is a kernel crash.

CVSS severity4.7
Medium
EPSS probability0.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A race in the Linux kernel ibmvnic driver allows local users to crash affected systems during concurrent transmit and reset. During reset, ibmvnic_complete_tx can restart a stopped transmit queue, letting ibmvnic_xmit dereference tx_scrq after the reset path frees or nulls it. Exploitation requires local low-privileged access, an active IBM virtual NIC, and precise overlap between queue completion and reset; the bounded consequence is a kernel crash.

The record

CVE
CVE-2022-49201
Published
Feb 26, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2025CVE 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

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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=5.4
  2. Affected versionversion=7ed5b31f4a6695a21f617df07646e9b15c6c1d29 <1bd58abf595b6cf1ba6dd47ec887c4c009155fc9
  3. Affected versionversion=7ed5b31f4a6695a21f617df07646e9b15c6c1d29 <4219196d1f662cb10a462eb9e076633a3fc31a15
  4. Affected versionversion=7ed5b31f4a6695a21f617df07646e9b15c6c1d29 <475f9cce98b63bc145b4efa66fa51175d4cb345f
  5. Affected versionversion=7ed5b31f4a6695a21f617df07646e9b15c6c1d29 <8507c6ade73cdbbbda5c3d31d67f52f2e1cf03fe

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.4; version=7ed5b31f4a6695a21f617df07646e9b15c6c1d29 <1bd58abf595b6cf1ba6dd47ec887c4c009155fc9; version=7ed5b31f4a6695a21f617df07646e9b15c6c1d29 <4219196d1f662cb10a462eb9e076633a3fc31a15; version=7ed5b31f4a6695a21f617df07646e9b15c6c1d29 <475f9cce98b63bc145b4efa66fa51175d4cb345f; version=7ed5b31f4a6695a21f617df07646e9b15c6c1d29 <8507c6ade73cdbbbda5c3d31d67f52f2e1cf03fe

Published CVSS scores

4.7CISA-ADPCVSS:3.1/AV:L/AC:H/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

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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-476NULL Pointer Dereference
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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