iio: buffer: hw-consumer: free scan_mask on buffer release

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Summary

CVECVE-2026-64498
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-25 10:17:35 UTC
Updated2026-07-25 10:17:35 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: iio: buffer: hw-consumer: free scan_mask on buffer release The scan_mask lifetime changed in commit 9a2e1233d38c ("iio: buffer: hw-consumer: remove redundant scan_mask flexible array"). Before that change, the scan mask storage was embedded in struct hw_consumer_buffer, so iio_hw_buf_release() could free the whole allocation with a single kfree(hw_buf). That commit moved the scan mask to a separate bitmap_zalloc() allocation stored in buffer.scan_mask, but left iio_hw_buf_release() unchanged. Free the scan mask in iio_hw_buf_release() before freeing the buffer wrapper.

Risk And Classification

EPSS: 0.001550000 probability, percentile 0.051900000 (date 2026-07-28)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 9a2e1233d38c460ad07f36901931f3674a32d1ed fb8e18f8ca724bd4de4643cad5b7c7230b9a5a71 git Not specified
CNA Linux Linux affected 9a2e1233d38c460ad07f36901931f3674a32d1ed 6325d6e2204327965b849c0a16efb6ac9202e5a8 git Not specified
CNA Linux Linux affected 7.1 Not specified
CNA Linux Linux unaffected 7.1 semver Not specified
CNA Linux Linux unaffected 7.1.4 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/6325d6e2204327965b849c0a16efb6ac9202e5a8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/fb8e18f8ca724bd4de4643cad5b7c7230b9a5a71 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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