CVE-2026-68446 (GCVE-0-2026-68446)
Vulnerability from cvelistv5
Published
2026-08-12 00:07
Modified
2026-08-19 16:35
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
drm/vmwgfx: Validate vmw_surface_metadata::array_size
This field comes from userspace and should be validated against specific
limits depending on which Shader Model (SM) is available.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: 504901dbb0b565fcbe466b0c56f3131586df5afd Version: 504901dbb0b565fcbe466b0c56f3131586df5afd Version: 504901dbb0b565fcbe466b0c56f3131586df5afd Version: 504901dbb0b565fcbe466b0c56f3131586df5afd Version: 504901dbb0b565fcbe466b0c56f3131586df5afd Version: 504901dbb0b565fcbe466b0c56f3131586df5afd Version: 504901dbb0b565fcbe466b0c56f3131586df5afd Version: 504901dbb0b565fcbe466b0c56f3131586df5afd |
||
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/gpu/drm/vmwgfx/vmwgfx_surface.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
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"status": "affected",
"version": "504901dbb0b565fcbe466b0c56f3131586df5afd",
"versionType": "git"
},
{
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"status": "affected",
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"versionType": "git"
},
{
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"status": "affected",
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"versionType": "git"
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{
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]
},
{
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"product": "Linux",
"programFiles": [
"drivers/gpu/drm/vmwgfx/vmwgfx_surface.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.7"
},
{
"lessThan": "5.7",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.265",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.216",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.148",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.101",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.42",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.6",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.265",
"versionStartIncluding": "5.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.216",
"versionStartIncluding": "5.7",
"vulnerable": true
},
{
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{
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},
{
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"versionStartIncluding": "5.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.42",
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"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1.6",
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},
{
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"versionStartIncluding": "5.7",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"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": {
"baseScore": 7.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"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-\u003eguest_memory_size makes the backing buffer far smaller than the surface the host device is told to service, and the undersized dirty-\u003eboxes 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\u0027d 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."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-19T16:35:40.576Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"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"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-68446",
"datePublished": "2026-08-12T00:07:37.385Z",
"dateReserved": "2026-07-30T09:28:09.395Z",
"dateUpdated": "2026-08-19T16:35:40.576Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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