xen/gntalloc: validate grant count before allocation

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CVE-2026-98900 · Microsoft / collected KEV context

cve-program · CVE-2026-98900

• https://git.kernel.org/stable/c/e2806390aa1c4d5b3f7a68f10a56ae12c71c00d8
• https://git.kernel.org/stable/c/71a0cf87e19fb35c4292ca88985e376e613c900a
• https://git.kernel.org/stable/c/641de086a05f349de7fc548612432bc2fed721ca
• https://git.kernel.org/stable/c/720554c04acba80018ded069d3e0984bebaee891
• https://git.kernel.org/stable/c/84d5727cef8eb9c8a28210ad248f1c70b223b065
• https://git.kernel.org/stable/c/231542f4e43cf9837cb520664545e85fbe666b7b
• https://git.kernel.org/stable/c/2299822f3f466b5dcad2377bf63986199f881a6b

• xen/gntalloc: validate grant count before allocation · Newly collected advisory · 23 Oct 2026