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CVE Record

CVE-2026-43461: spi: amlogic: spifc-a4: Fix DMA mapping error handling

In the Linux kernel, the following vulnerability has been resolved: spi: amlogic: spifc-a4: Fix DMA mapping error handling Fix three bugs in aml_sfc_dma_buffer_setup() error paths: 1. Unnecessary goto: When the first DMA mapping (sfc->daddr) fails, nothing needs cleanup. Use direct return instead of goto. 2. Double-unmap bug: When info DMA mapping failed, the code would unmap sfc->daddr inline, then fall through to out_map_data which would unmap it again, causing a double-unmap. 3. Wrong unmap size: The out_map_info label used datalen instead of infolen when unmapping sfc->iaddr, which could lead to incorrect DMA sync behavior.

HighCVSS 7.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

A Linux driver for the Amlogic A4 SPI flash controller mishandles failures while preparing DMA transfers. The errors can cause duplicate cleanup or use the wrong buffer size, potentially affecting system confidentiality, integrity, and availability. Risk is limited to systems using the relevant hardware and driver path.

Executive priority

Treat as a high-priority, hardware-scoped kernel update. Rapidly identify affected Amlogic-based appliances or embedded systems, then patch through supported vendor channels. Broad emergency action is not supported for systems lacking the relevant controller or driver.

Technical view

The vulnerability is in aml_sfc_dma_buffer_setup() within the Amlogic spifc-a4 SPI driver. Its DMA-mapping error paths could double-unmap sfc->daddr and unmap sfc->iaddr using datalen instead of infolen. The published CVSS 3.1 score is 7.8, reflecting a local, low-privilege attack requiring no user interaction.

Likely exposure

Likely exposure is concentrated in Linux systems using the Amlogic A4 SPI flash controller and affected spifc-a4 driver versions. The supplied record names releases including 6.18, 6.18.19, 6.19.9, and 7.0, but does not clearly express complete version boundaries.

Exploitation context

The supplied record does not identify public exploitation, and the CVE is not listed as KEV. The CVSS vector describes local access with low privileges. No remote attack path or exploit method is established by the provided sources.

Researcher notes

The primary defects are error-path resource-management mistakes: a double DMA unmap and an incorrect unmap length. The supplied references provide three stable-tree fixes, but do not map each commit to explicit release branches. Evidence is insufficient to characterize exploitability beyond the published local CVSS assessment.

Mitigation direction

  • Apply a vendor-supported kernel update containing the applicable linked stable fix.
  • Check distribution or device-vendor guidance for precise affected and fixed package versions.
  • Prioritize systems confirmed to use the Amlogic A4 SPI controller and spifc-a4 driver.
  • Monitor upstream and vendor advisories because the supplied version boundaries are incomplete.

Validation and detection

  • Inventory kernel versions on devices containing Amlogic A4 hardware.
  • Confirm whether the spifc-a4 driver is present and used by the deployed system.
  • Verify the installed kernel includes the applicable linked stable commit.
  • After updating, run normal SPI storage and platform regression testing.
  • Review vendor advisories to confirm package-level remediation status.
Prepared
Confidence
medium
Sources
5

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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CVE-2026-43461 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.8 (3.1)
Known Exploited
No
Published

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

1CVSS vectors
3Timeline events
0ADP providers
4Source links

CVSS vector scores

1 official score

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
7.8CVSS 3.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9Linux

Vulnerability scoring details

Base CVSS 3.1 score

7.8High
CVSS 3.1 vector shape for CVE-2026-43461Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux4670db6f32e9379f5ab6c9bb2a6787cd9b9230a9, 4670db6f32e9379f5ab6c9bb2a6787cd9b9230a9, 4670db6f32e9379f5ab6c9bb2a6787cd9b9230a9unaffected
LinuxLinux6.18, 0, 6.18.19, 6.19.9, 7.0affected
Weakness

CWE details

No CWE listed

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