Bug 2391033 (CVE-2025-38676)

Summary: CVE-2025-38676 kernel: iommu/amd: Avoid stack buffer overflow from kernel cmdline
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-08-26 14:01:49 UTC 
In the Linux kernel, the following vulnerability has been resolved:

iommu/amd: Avoid stack buffer overflow from kernel cmdline

While the kernel command line is considered trusted in most environments,
avoid writing 1 byte past the end of "acpiid" if the "str" argument is
maximum length.
Comment 1 Keith Grant 2025-08-26 15:06:48 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025082627-CVE-2025-38676-326c@gregkh/T