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CVE Record

CVE-2022-49019: net: ethernet: nixge: fix NULL dereference

In the Linux kernel, the following vulnerability has been resolved: net: ethernet: nixge: fix NULL dereference In function nixge_hw_dma_bd_release() dereference of NULL pointer priv->rx_bd_v is possible for the case of its allocation failure in nixge_hw_dma_bd_init(). Move for() loop with priv->rx_bd_v dereference under the check for its validity. Found by Linux Verification Center (linuxtesting.org) with SVACE.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysislow

Security readout for executives and security teams

Plain-English summary

This is a Linux kernel bug in the nixge Ethernet driver. If memory allocation fails during driver setup, later cleanup can dereference a null pointer. The likely business impact is system instability or crash on affected systems, not confirmed data theft or remote compromise.

Executive priority

Handle through normal kernel patch management unless nixge is used in production network infrastructure. Escalate if affected systems are critical, hard to reboot, or custom-built without vendor kernel updates.

Technical view

CVE-2022-49019 fixes a NULL pointer dereference in nixge_hw_dma_bd_release() after rx_bd_v allocation failure in nixge_hw_dma_bd_init(). The patch moves the receive descriptor cleanup loop behind a validity check. Sources do not provide CVSS, CWE, exploitability details, or confirmed attack prerequisites.

Likely exposure

Exposure appears limited to Linux systems running affected kernel versions with the nixge Ethernet driver present or relevant. The source bundle does not identify specific distributions, appliances, hardware platforms, or cloud images affected.

Exploitation context

CISA KEV status is false in the provided bundle, and no cited source claims active exploitation. The evidence describes a kernel reliability flaw found by Linux Verification Center using SVACE, not a public exploit path.

Researcher notes

The public record is sparse: no CVSS, no CWE, no exploit claims, and no named distributions. Analysis should center on driver reachability, allocation-failure cleanup behavior, and whether downstream kernels include one of the stable fixes.

Mitigation direction

  • Apply kernel updates containing the referenced stable nixge fixes.
  • Confirm your Linux vendor has backported the fix to supported kernels.
  • Prioritize systems using nixge-supported Ethernet hardware or custom kernels.
  • If no update exists, follow vendor guidance for supported mitigations.

Validation and detection

  • Inventory kernel versions on Linux systems that may include nixge.
  • Check whether the nixge driver is built, loadable, or in use.
  • Verify the referenced stable fix is present or backported.
  • Review crash logs for kernel NULL dereference events in nixge paths.
Prepared
Confidence
medium
Sources
7

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2022-49019 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
3Timeline events
1ADP providers
6Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux492caffa8a1a405f661c111acabfe6b8b9645db8, 492caffa8a1a405f661c111acabfe6b8b9645db8, 492caffa8a1a405f661c111acabfe6b8b9645db8, 492caffa8a1a405f661c111acabfe6b8b9645db8, 492caffa8a1a405f661c111acabfe6b8b9645db8unaffected
LinuxLinux4.17, 0, 5.4.226, 5.10.158, 5.15.82, 6.0.12, 6.1affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.