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CVE Record

CVE-2024-26790: dmaengine: fsl-qdma: fix SoC may hang on 16 byte unaligned read

In the Linux kernel, the following vulnerability has been resolved: dmaengine: fsl-qdma: fix SoC may hang on 16 byte unaligned read There is chip (ls1028a) errata: The SoC may hang on 16 byte unaligned read transactions by QDMA. Unaligned read transactions initiated by QDMA may stall in the NOC (Network On-Chip), causing a deadlock condition. Stalled transactions will trigger completion timeouts in PCIe controller. Workaround: Enable prefetch by setting the source descriptor prefetchable bit ( SD[PF] = 1 ). Implement this workaround.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This is a Linux kernel availability issue tied to specific SoC DMA hardware. On affected systems, certain unaligned QDMA reads can hang the SoC by deadlocking transactions inside the chip fabric, disrupting PCIe-related operation. Exposure appears hardware-specific, not broad across all Linux deployments.

Executive priority

Treat as a targeted availability risk for specialized Linux-based hardware, not a broad enterprise emergency. Patch during the next maintenance cycle for affected appliances, network equipment, embedded systems, or edge devices where unexpected hangs create operational impact.

Technical view

CVE-2024-26790 fixes the fsl-qdma driver for an LS1028A erratum: 16-byte unaligned QDMA read transactions may stall in the Network-On-Chip and cause deadlock, with PCIe completion timeouts. The kernel fix implements the documented workaround by setting the source descriptor prefetchable bit, SD[PF].

Likely exposure

Likely limited to Linux systems using the Freescale/NXP fsl-qdma driver on affected LS1028A-class SoCs or vendor kernels carrying the vulnerable code. General Linux servers without this QDMA hardware are unlikely to be exposed based on the supplied sources.

Exploitation context

The provided sources do not report active exploitation, KEV listing, public exploit code, or remote attack details. The issue is described as a hardware erratum reachable through QDMA unaligned read behavior, so practical risk depends on whether local workloads or devices can trigger those transactions.

Researcher notes

The public record lacks CVSS, CWE, exploitability analysis, and detailed affected-version ranges beyond Linux kernel references. Research should focus on hardware presence, fsl-qdma code lineage, stable backport status, and whether local DMA-capable paths can reliably trigger unaligned read transactions.

Mitigation direction

  • Apply Linux kernel updates containing the referenced stable fixes.
  • Review Debian LTS or vendor advisories for matching kernel package updates.
  • Prioritize affected embedded, edge, and appliance systems using LS1028A hardware.
  • If patching is delayed, check vendor guidance for operational workarounds.

Validation and detection

  • Inventory systems for LS1028A-class SoCs and fsl-qdma driver usage.
  • Map running kernel versions to fixed stable commits or distro package advisories.
  • Check logs for PCIe completion timeouts or DMA-related hangs on exposed hardware.
  • Confirm updated kernels include the SD[PF] prefetch workaround.
Prepared
Confidence
medium
Sources
10

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

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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
2ADP providers
9Source 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
CVECVE Program Container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxb092529e0aa09829a6404424ce167bf3ce3235e2, b092529e0aa09829a6404424ce167bf3ce3235e2, b092529e0aa09829a6404424ce167bf3ce3235e2, b092529e0aa09829a6404424ce167bf3ce3235e2, b092529e0aa09829a6404424ce167bf3ce3235e2, b092529e0aa09829a6404424ce167bf3ce3235e2, b092529e0aa09829a6404424ce167bf3ce3235e2unaffected
LinuxLinux5.1, 0, 5.4.271, 5.10.212, 5.15.151, 6.1.81, 6.6.21, 6.7.9, 6.8affected
Weakness

CWE details

No CWE listed

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