Bug 2461488 (CVE-2026-31661)

Summary: CVE-2026-31661 kernel: wifi: brcmsmac: Fix dma_free_coherent() size
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in the Linux kernel's brcmsmac Wi-Fi driver. This vulnerability arises from an incorrect size used during memory deallocation (dma_free_coherent) that does not match the size allocated (dma_alloc_consistent), which may be adjusted for alignment. An attacker could potentially exploit this memory mismatch, leading to memory corruption. This could result in a denial of service or other unpredictable system behavior.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description OSIDB Bzimport 2026-04-24 15:04:29 UTC
In the Linux kernel, the following vulnerability has been resolved:

wifi: brcmsmac: Fix dma_free_coherent() size

dma_alloc_consistent() may change the size to align it. The new size is
saved in alloced.

Change the free size to match the allocation size.