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Multiple heap-based buffer overflows in the cirrus_invalidate_region function in the Cirrus VGA extension in QEMU 0.8.2, as used in Xen and possibly other products, might allow local users to execute arbitrary code via unspecified vectors related to "attempting to mark non-existent regions as dirty," aka the "bitblt" heap overflow.
Use CWE-787, Qemu vendor hub and Qemu product page to widen CVE-2007-1320 into its surrounding weakness, vendor, and product context.
Compare it with CVE-2024-24474, CVE-2024-6519 and CVE-2024-7730 for nearby disclosures in the same product family.