{"id":"CVE-2026-80702","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-80702","generatedAt":"2026-10-28T00:51:48.436Z","title":"In the Linux kernel, the following vulnerability has been resolved: drm/vmwgfx: fix guest_memory_dirty bitfield clobbered as size Two sites in vmwgfx_resource.c assign boolean literals to res->guest_memory_size, which is an unsigned long allocation-size…","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vmwgfx: fix guest_memory_dirty bitfield clobbered as size\n\nTwo sites in vmwgfx_resource.c assign boolean literals to\nres->guest_memory_size, which is an unsigned long allocation-size\nfield; the intended target is the adjacent res->guest_memory_dirty\nbitfield.  After the assignments the field holds 0 or 1 instead of\nthe resource's MOB allocation size:\n\n  - vmw_resource_release()       writes 0 (false), and\n  - vmw_resource_unbind_list()   writes 1 (true).\n\nSubsequent revalidation paths read guest_memory_size when computing\nthe dirty page range (vmw_bo_dirty_transfer_to_res()) and the buffer\nallocation size (vmw_resource_buf_alloc()), producing zero-length\nwalks or wrap-around ranges that read or write past the MOB bitmap.\nThe dirty-tracking intent of the original code (mark the resource as\ndirtied since the last sync) is also lost, since guest_memory_dirty\nis never updated.\n\nRename both assignments to guest_memory_dirty.","published":"2026-08-28T08:16:56.000Z","lastModified":"2026-10-16T20:18:07.000Z","status":"Received","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":{"version":"3.1","score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"cwe":[],"affected":[],"epss":{"score":0.00129,"percentile":0.02482,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.13%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/21bbe38faee4a195d33a93e3908e307807f7745d","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/282f261cb035e5f01a486f76d356b7e9dbfba73f","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3b2bb16a5b622867140d69925db411ac8ecb3b2b","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/83195b778f2d109a3a4f3ffaba4dce7e4cdb58aa","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/9d6cbb76fe9cd760351f6b0b20f1bf788eab8fa6","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-80702","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}