{ "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" } } } }