CVE-2026-43461
Analyzed Analyzed - Analysis Complete
spi: amlogic spifc-a4 DMA mapping error handling fix

Publication date: 2026-05-08

Last updated on: 2026-05-20

Assigner: kernel.org

Description
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.
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Meta Information
Published
2026-05-08
Last Modified
2026-05-20
Generated
2026-06-19
AI Q&A
2026-05-08
EPSS Evaluated
2026-06-18
NVD
CVE-2026-43461
EUVD
EUVD-2026-28767
Affected Vendors & Products
Showing 5 associated CPEs
Vendor Product Version / Range
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel From 6.19 (inc) to 6.19.9 (exc)
linux linux_kernel From 6.18 (inc) to 6.18.19 (exc)
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Exploitability
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability is related to the Linux kernel's amlogic spifc-a4 driver, specifically in the DMA (Direct Memory Access) mapping error handling within the aml_sfc_dma_buffer_setup() function.

  • There was an unnecessary use of a goto statement when the first DMA mapping failed, which should have been a direct return instead.
  • A double-unmap bug occurred where the code would unmap the same DMA address twice if the info DMA mapping failed.
  • An incorrect unmap size was used in one error path, potentially causing incorrect DMA synchronization behavior.

These bugs have been fixed to ensure proper error handling and resource cleanup in the DMA mapping process.

Impact Analysis

Improper handling of DMA mapping errors can lead to resource mismanagement such as double unmapping or incorrect synchronization, which may cause system instability or crashes.

While the description does not specify direct security impacts like privilege escalation or data leakage, such bugs in kernel drivers can potentially lead to unpredictable behavior affecting system reliability.

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