{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-80702", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.786Z", "datePublished": "2026-08-28T06:53:05.253Z", "dateUpdated": "2026-08-29T06:22:22.050Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-29T06:22:22.050Z"}, "descriptions": [{"lang": "en", "value": "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."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - Reachable only via local DRM ioctls on the vmwgfx render node (surface/context create-unref, DRM_VMW_EXECBUF, synccpu); vmw_resource_unbind_list runs from vmw_bo_move_notify during MOB eviction, not from any network or physical bus.\nAC:L - An unprivileged attacker controls the full GPU resource lifecycle and can force MOB moves plus subsequent revalidation (execbuf, memory pressure, destroy paths) to clobber guest_memory_size to 0/1 without races or victim-dependent heap layout.\nPR:L - Entry ioctls use DRM_RENDER_ALLOW, so any local user with access to /dev/dri/renderD* on a VMware SVGA guest can trigger vmw_resource_release or vmw_resource_unbind_list and the follow-on validate/dirty paths without init-namespace root.\nUI:N - Exploitation requires only the attacker opening the DRM render device and issuing crafted GPU resource operations; no additional actions by another user or administrator are needed.\nS:U - The bug corrupts guest-kernel vmwgfx MOB dirty-tracking and heap metadata during resource revalidation; impact is confined to the guest kernel security domain and does not directly cross a VM/host or IOMMU boundary.\nC:H - Clobbering guest_memory_size to 0 or 1 breaks dirty page-range math in vmw_bo_dirty_transfer_to_res and vmw_resource_buf_alloc, producing zero-length or wrap-around walks that read past the MOB dirty bitmap and adjacent kernel heap memory.\nI:H - The same corrupted size drives out-of-bounds bitmap_clear and dirty_sync operations past the MOB bitmap and undersized reallocations, yielding a kernel heap write primitive that can be leveraged for guest privilege escalation.\nA:H - Out-of-bounds MOB bitmap access and mis-sized buffer reallocation during revalidation after unbind or release can kernel-oops or panic the guest, providing a reliable denial-of-service against the VM."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/vmwgfx/vmwgfx_resource.c"], "versions": [{"version": "668b206601c5f5063e03b76784a0d3024fa2b249", "lessThan": "21bbe38faee4a195d33a93e3908e307807f7745d", "status": "affected", "versionType": "git"}, {"version": "668b206601c5f5063e03b76784a0d3024fa2b249", "lessThan": "9d6cbb76fe9cd760351f6b0b20f1bf788eab8fa6", "status": "affected", "versionType": "git"}, {"version": "668b206601c5f5063e03b76784a0d3024fa2b249", "lessThan": "282f261cb035e5f01a486f76d356b7e9dbfba73f", "status": "affected", "versionType": "git"}, {"version": "668b206601c5f5063e03b76784a0d3024fa2b249", "lessThan": "3b2bb16a5b622867140d69925db411ac8ecb3b2b", "status": "affected", "versionType": "git"}, {"version": "668b206601c5f5063e03b76784a0d3024fa2b249", "lessThan": "83195b778f2d109a3a4f3ffaba4dce7e4cdb58aa", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/vmwgfx/vmwgfx_resource.c"], "versions": [{"version": "6.4", "status": "affected"}, {"version": "0", "lessThan": "6.4", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.151", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.103", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.44", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.8", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.6.151"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.12.103"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.18.44"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "7.1.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/21bbe38faee4a195d33a93e3908e307807f7745d"}, {"url": "https://git.kernel.org/stable/c/9d6cbb76fe9cd760351f6b0b20f1bf788eab8fa6"}, {"url": "https://git.kernel.org/stable/c/282f261cb035e5f01a486f76d356b7e9dbfba73f"}, {"url": "https://git.kernel.org/stable/c/3b2bb16a5b622867140d69925db411ac8ecb3b2b"}, {"url": "https://git.kernel.org/stable/c/83195b778f2d109a3a4f3ffaba4dce7e4cdb58aa"}], "title": "drm/vmwgfx: fix guest_memory_dirty bitfield clobbered as size", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/gpu/drm/vmwgfx/vmwgfx_resource.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "21bbe38faee4a195d33a93e3908e307807f7745d", "status": "affected", "version": "668b206601c5f5063e03b76784a0d3024fa2b249", "versionType": "git"}, {"lessThan": "9d6cbb76fe9cd760351f6b0b20f1bf788eab8fa6", "status": "affected", "version": "668b206601c5f5063e03b76784a0d3024fa2b249", "versionType": "git"}, {"lessThan": "282f261cb035e5f01a486f76d356b7e9dbfba73f", "status": "affected", "version": "668b206601c5f5063e03b76784a0d3024fa2b249", "versionType": "git"}, {"lessThan": "3b2bb16a5b622867140d69925db411ac8ecb3b2b", "status": "affected", "version": "668b206601c5f5063e03b76784a0d3024fa2b249", "versionType": "git"}, {"lessThan": "83195b778f2d109a3a4f3ffaba4dce7e4cdb58aa", "status": "affected", "version": "668b206601c5f5063e03b76784a0d3024fa2b249", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/gpu/drm/vmwgfx/vmwgfx_resource.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.4"}, {"lessThan": "6.4", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.151", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.103", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.44", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.8", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-80702", "lastModified": "2026-08-29T07:16:51.943", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-08-28T08:16:55.740", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "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"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}