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CVE Record

CVE-2024-50297: net: xilinx: axienet: Enqueue Tx packets in dql before dmaengine starts

In the Linux kernel, the following vulnerability has been resolved: net: xilinx: axienet: Enqueue Tx packets in dql before dmaengine starts Enqueue packets in dql after dma engine starts causes race condition. Tx transfer starts once dma engine is started and may execute dql dequeue in completion before it gets queued. It results in following kernel crash while running iperf stress test: kernel BUG at lib/dynamic_queue_limits.c:99! <snip> Internal error: Oops - BUG: 00000000f2000800 [#1] SMP pc : dql_completed+0x238/0x248 lr : dql_completed+0x3c/0x248 Call trace: dql_completed+0x238/0x248 axienet_dma_tx_cb+0xa0/0x170 xilinx_dma_do_tasklet+0xdc/0x290 tasklet_action_common+0xf8/0x11c tasklet_action+0x30/0x3c handle_softirqs+0xf8/0x230 <snip> Start dmaengine after enqueue in dql fixes the crash.

HighCVSS 7.5Not KEV-listedUpdated
Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

A race condition in the Linux Xilinx AXI Ethernet transmit path can crash the kernel during heavy network traffic. The documented impact is loss of availability; the sources do not report data theft or modification.

Executive priority

Treat as a high-priority availability issue where affected Xilinx networking is used, especially on externally reachable or operationally critical systems. Scope the specialized driver exposure first, then patch confirmed systems through supported kernel channels.

Technical view

The driver starts the DMA engine before recording transmitted packets in Dynamic Queue Limits. A completion callback can therefore dequeue an unrecorded packet, triggering a kernel BUG in dql_completed. The correction queues the packet in DQL before starting DMA.

Likely exposure

Exposure is limited to Linux systems using the affected Xilinx AXI Ethernet driver and vulnerable kernel builds. The supplied record lists affected 6.8-era through 6.12-related versions, but its version notation is ambiguous; verify exact vendor build applicability.

Exploitation context

The CVSS 3.1 assessment is 7.5 for remotely reachable denial of service without privileges or user interaction. The source demonstrates a crash during iperf stress testing. This CVE is not listed as KEV, and the bundle provides no evidence of active exploitation.

Researcher notes

This is CWE-362 race-condition behavior in transmit completion accounting. The documented failure is a kernel Oops caused by DMA completion preceding DQL enqueue. The sources support denial of service under stress but do not establish reliable remote triggering, exploitation in the wild, or confidentiality and integrity impact.

Mitigation direction

  • Update to a vendor-supported kernel containing one of the cited stable fixes.
  • Prioritize network-facing systems using the Xilinx AXI Ethernet driver.
  • Consult the Linux or distribution vendor for exact fixed package versions.
  • If immediate updating is impossible, reduce exposure and monitor affected systems for kernel crashes.

Validation and detection

  • Determine whether each system uses the Xilinx AXI Ethernet driver.
  • Record the running kernel and distribution package versions.
  • Confirm the installed build contains the cited correction through vendor changelogs or commit ancestry.
  • Review kernel logs for dql_completed BUG traces involving axienet_dma_tx_cb.
  • After updating, perform controlled network-load testing during an approved maintenance window.
Prepared
Confidence
high
Sources
4

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

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ATT&CK lookup starting points

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cwe · low confidence lookup

CWE-362: Exact CWE lookup

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Open ATT&CK lookup
cve · low confidence lookup

CVE-2024-50297 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.5 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

2CVSS vectors
3Timeline events
1ADP providers
3Source links

SSVC decision data

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

CVSS vector scores

2 official scores

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7.5CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6Linux
4.7CVSS 3.1MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H13.6CISA-ADP

Vulnerability scoring details

Base CVSS 3.1 score

7.5High
CVSS 3.1 vector shape for CVE-2024-50297Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

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
cvssV3_1other:ssvc
Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux6a91b846af85a24241decd686269e8e038eb13d1, 6a91b846af85a24241decd686269e8e038eb13d1unaffected
LinuxLinux6.8, 0, 6.11.8, 6.12affected
Weakness

CWE details

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

CWE-362 · source CWE mapping

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.