CVE-2022-49019

Kernel crash via failed receive-ring allocation

Published Oct 21, 2024 · Updated May 11, 2026

NULL pointer dereference in the Linux nixge Ethernet driver allows local users to crash the kernel after a DMA allocation failure. nixge_hw_dma_bd_release iterates over priv->rx_bd_v after nixge_hw_dma_bd_init fails to allocate that receive descriptor array, dereferencing a NULL pointer. Reaching the fault requires local low-privileged access and an allocation failure; the bounded consequence is a kernel crash, with no reported data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the Linux nixge Ethernet driver allows local users to crash the kernel after a DMA allocation failure. nixge_hw_dma_bd_release iterates over priv->rx_bd_v after nixge_hw_dma_bd_init fails to allocate that receive descriptor array, dereferencing a NULL pointer. Reaching the fault requires local low-privileged access and an allocation failure; the bounded consequence is a kernel crash, with no reported data disclosure or modification.

The record

CVE
CVE-2022-49019
Published
Oct 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 21, 2024CVE 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=4.17
  2. Affected versionversion=492caffa8a1a405f661c111acabfe6b8b9645db8 <45752af0247589e6d3dede577415bfe117b4392c
  3. Affected versionversion=492caffa8a1a405f661c111acabfe6b8b9645db8 <80e82f7b440b65cf131dce10f487dc73a7046e6b
  4. Affected versionversion=492caffa8a1a405f661c111acabfe6b8b9645db8 <910c0264b64ef2dad8887714a7c56c93e39a0ed3
  5. Affected versionversion=492caffa8a1a405f661c111acabfe6b8b9645db8 <9256db4e45e8b497b0e993cc3ed4ad08eb2389b6
  6. Affected versionversion=492caffa8a1a405f661c111acabfe6b8b9645db8 <9c584d6d9cfb935dce8fc81a4c26debac0a3049b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.17; version=492caffa8a1a405f661c111acabfe6b8b9645db8 <45752af0247589e6d3dede577415bfe117b4392c; version=492caffa8a1a405f661c111acabfe6b8b9645db8 <80e82f7b440b65cf131dce10f487dc73a7046e6b; version=492caffa8a1a405f661c111acabfe6b8b9645db8 <910c0264b64ef2dad8887714a7c56c93e39a0ed3; version=492caffa8a1a405f661c111acabfe6b8b9645db8 <9256db4e45e8b497b0e993cc3ed4ad08eb2389b6; version=492caffa8a1a405f661c111acabfe6b8b9645db8 <9c584d6d9cfb935dce8fc81a4c26debac0a3049b

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.

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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-476NULL Pointer Dereference
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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