Bug 2502524 (CVE-2026-64145)

Summary: CVE-2026-64145 kernel: wifi: wilc1000: fix dma_buffer leak on bus acquire failure
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
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Priority: low    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in the Linux kernel's wilc1000 Wi-Fi driver. This vulnerability occurs during the firmware download process when the system fails to properly acquire the bus. An error in the code's cleanup path causes a Direct Memory Access (DMA) buffer to not be released, resulting in a memory leak. Over time, repeated occurrences of this leak could lead to system instability or a denial of service by exhausting available memory resources.
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Description OSIDB Bzimport 2026-07-19 17:04:13 UTC 
In 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.
Comment 1 TEJ RATHI 2026-07-20 12:15:10 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026071930-CVE-2026-64145-e585@gregkh/T