wifi: wilc1000: fix dma_buffer leak on bus acquire failure

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Summary

CVECVE-2026-64145
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-19 16:17:56 UTC
Updated2026-07-19 16:17:56 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: wifi: wilc1000: fix dma_buffer leak on bus acquire failure wilc_wlan_firmware_download() allocates dma_buffer with kmalloc() at the top of the function and uses a 'fail:' label to free it via kfree(dma_buffer) on error. All later error paths correctly use 'goto fail' to route through this cleanup. However, the early failure path after the first acquire_bus() call uses a bare 'return ret;', which leaks dma_buffer whenever the bus acquire fails. Replace the early return with goto fail so the existing cleanup path runs. Found via a custom Coccinelle semantic patch hunting for kmalloc'd locals leaked on early-return error paths in driver firmware-download code.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 1241c5650ff7a0236cebb89acca8aade48839fd6 95c82d498d74c4e587db30021ca1aec90e29b5a5 git Not specified
CNA Linux Linux affected 1241c5650ff7a0236cebb89acca8aade48839fd6 32d7584441b9ecb279a03653b432612546e5efbe git Not specified
CNA Linux Linux affected 1241c5650ff7a0236cebb89acca8aade48839fd6 dd7b6a8671939708cc4b7a46786d8c11297e8f69 git Not specified
CNA Linux Linux affected 6.13 Not specified
CNA Linux Linux unaffected 6.13 semver Not specified
CNA Linux Linux unaffected 6.18.34 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.11 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/dd7b6a8671939708cc4b7a46786d8c11297e8f69 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/32d7584441b9ecb279a03653b432612546e5efbe 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/95c82d498d74c4e587db30021ca1aec90e29b5a5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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