{"id":"CVE-2026-80702","revision":"7950213f280640d0addac4aad090b61e","records":[{"revision":"7950213f280640d0addac4aad090b61e","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-80702","aliases":[],"title":"drm/vmwgfx: fix guest_memory_dirty bitfield clobbered as 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.","state":0,"publishedAt":"2026-08-28T06:53:05.253+00:00","modifiedAt":"2026-10-16T19:26:34.045+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/gpu/drm/vmwgfx/vmwgfx_resource.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"668b206601c5f5063e03b76784a0d3024fa2b249\",\n                            \"lessThan\": \"21bbe38faee4a195d33a93e3908e307807f7745d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"668b206601c5f5063e03b76784a0d3024fa2b249\",\n                            \"lessThan\": \"9d6cbb76fe9cd760351f6b0b20f1bf788eab8fa6\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"668b206601c5f5063e03b76784a0d3024fa2b249\",\n                            \"lessThan\": \"282f261cb035e5f01a486f76d356b7e9dbfba73f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"668b206601c5f5063e03b76784a0d3024fa2b249\",\n                            \"lessThan\": \"3b2bb16a5b622867140d69925db411ac8ecb3b2b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"668b206601c5f5063e03b76784a0d3024fa2b249\",\n                            \"lessThan\": \"83195b778f2d109a3a4f3ffaba4dce7e4cdb58aa\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/gpu/drm/vmwgfx/vmwgfx_resource.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.4\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.4\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.151\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.103\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.44\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.8\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/21bbe38faee4a195d33a93e3908e307807f7745d","https://git.kernel.org/stable/c/9d6cbb76fe9cd760351f6b0b20f1bf788eab8fa6","https://git.kernel.org/stable/c/282f261cb035e5f01a486f76d356b7e9dbfba73f","https://git.kernel.org/stable/c/3b2bb16a5b622867140d69925db411ac8ecb3b2b","https://git.kernel.org/stable/c/83195b778f2d109a3a4f3ffaba4dce7e4cdb58aa"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80702","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-80702","identifiers":["CVE-2026-80702"]},"retained":false,"historicalAffected":[]}],"coverage":[]}