{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-68446","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-07-30T09:28:09.395Z","datePublished":"2026-08-12T00:07:37.385Z","dateUpdated":"2026-08-19T16:35:40.576Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-19T16:35:40.576Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vmwgfx: Validate vmw_surface_metadata::array_size\n\nThis field comes from userspace and should be validated against specific\nlimits depending on which Shader Model (SM) is available."}],"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 - The bug is reached through the DRM_IOCTL_VMW_GB_SURFACE_CREATE/_EXT ioctls on the vmwgfx render node (/dev/dri/renderD128), i.e. local access to the device file on a VMware guest; no network or physical access is involved.\nAC:L - The attacker directly supplies array_size, mip_levels and base_size in a single ioctl and can deterministically choose values that wrap the 32-bit size/subresource computations; no race or uncontrolled precondition is required.\nPR:L - Both ioctls are registered DRM_RENDER_ALLOW, so an unprivileged local user (or containerized workload) holding the normal render-node permissions can call them without DRM master, root, or any capability.\nUI:N - Exploitation is entirely attacker-driven via ioctl calls on an already-open render node; no action by another user or administrator is needed.\nS:U - The unvalidated value corrupts guest kernel memory and device-command state within the same kernel security authority; no VM/IOMMU or sandbox boundary is crossed by the flaw itself.\nC:H - The wrapped res->guest_memory_size makes the backing buffer far smaller than the surface the host device is told to service, and the undersized dirty->boxes array is indexed out of bounds, giving out-of-bounds reads of adjacent kernel heap data that can be leaked back through surface contents.\nI:H - The u32 overflows in vmw_surface_get_serialized_size() and num_layers*num_mip yield an undersized backing BO and dirty-tracking array, producing controlled out-of-bounds heap writes (SVGA3dBox data and device DMA past the buffer) usable for heap corruption and privilege escalation.\nA:H - Out-of-bounds writes past kvzalloc'd dirty trackers and BO-sized mismatches reliably corrupt kernel heap metadata, causing oopses/panics; huge array_size values also drive enormous allocations, so a local user can crash the guest kernel."}]}],"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_surface.c"],"versions":[{"version":"504901dbb0b565fcbe466b0c56f3131586df5afd","lessThan":"e949adf2d42678fb391a41db277e2fcb12090566","status":"affected","versionType":"git"},{"version":"504901dbb0b565fcbe466b0c56f3131586df5afd","lessThan":"0403cec2aff8037bc246cf9a0831eb169ddcd9df","status":"affected","versionType":"git"},{"version":"504901dbb0b565fcbe466b0c56f3131586df5afd","lessThan":"aded8463466ede7a7fbd1bbf821756c67c83e89b","status":"affected","versionType":"git"},{"version":"504901dbb0b565fcbe466b0c56f3131586df5afd","lessThan":"5ff94e1279176b539d451e3e754fdcbd1a8d520a","status":"affected","versionType":"git"},{"version":"504901dbb0b565fcbe466b0c56f3131586df5afd","lessThan":"71779fe8bf403a9b3e28dc59229fa556db32d35d","status":"affected","versionType":"git"},{"version":"504901dbb0b565fcbe466b0c56f3131586df5afd","lessThan":"b1379f0c42b88cb60b9f3757eb5d1e73ad460ed8","status":"affected","versionType":"git"},{"version":"504901dbb0b565fcbe466b0c56f3131586df5afd","lessThan":"6910ccaf41678f7761ba2e57d72b77d056320b4d","status":"affected","versionType":"git"},{"version":"504901dbb0b565fcbe466b0c56f3131586df5afd","lessThan":"a4f55260f7f7d4dc4d0ee55063dfb0c457b77991","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_surface.c"],"versions":[{"version":"5.7","status":"affected"},{"version":"0","lessThan":"5.7","status":"unaffected","versionType":"semver"},{"version":"5.10.265","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.216","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.183","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.148","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.101","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.42","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.1.6","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":"5.7","versionEndExcluding":"5.10.265"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"5.15.216"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.1.183"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.6.148"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.12.101"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.18.42"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"7.1.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"7.2"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/e949adf2d42678fb391a41db277e2fcb12090566"},{"url":"https://git.kernel.org/stable/c/0403cec2aff8037bc246cf9a0831eb169ddcd9df"},{"url":"https://git.kernel.org/stable/c/aded8463466ede7a7fbd1bbf821756c67c83e89b"},{"url":"https://git.kernel.org/stable/c/5ff94e1279176b539d451e3e754fdcbd1a8d520a"},{"url":"https://git.kernel.org/stable/c/71779fe8bf403a9b3e28dc59229fa556db32d35d"},{"url":"https://git.kernel.org/stable/c/b1379f0c42b88cb60b9f3757eb5d1e73ad460ed8"},{"url":"https://git.kernel.org/stable/c/6910ccaf41678f7761ba2e57d72b77d056320b4d"},{"url":"https://git.kernel.org/stable/c/a4f55260f7f7d4dc4d0ee55063dfb0c457b77991"}],"title":"drm/vmwgfx: Validate vmw_surface_metadata::array_size","x_generator":{"engine":"bippy-1.2.0"}}}}