CVE-2026-80888
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: drm/vmwgfx: drop dma_buf reference on foreign-fd prime import ttm_prime_fd_to_handle() returns -ENOSYS when the imported fd's dma_buf->ops do not match the ttm_object_device's ops, but does so without releasing the reference acquired by dma_buf_get(). Any unprivileged renderD client passing a non-vmwgfx prime fd through the DRM_VMW_GB_SURFACE_REF{,_EXT} path leaks one dma_buf reference per call and indefinitely pins the foreign exporter's GEM resources. Funnel the error path through the existing dma_buf_put() so the reference is always dropped.
Severity
Not scored
CVSS score
Not available
Vulnerability status
Received
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-09-04 18:17:56.787000
Last modified
2026-11-06 17:20:00.423000
View original CVE JSON
{
"id": "CVE-2026-80888",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-09-04T18:17:56.787",
"lastModified": "2026-11-06T17:20:00.423",
"vulnStatus": "Received",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vmwgfx: drop dma_buf reference on foreign-fd prime import\n\nttm_prime_fd_to_handle() returns -ENOSYS when the imported fd's\ndma_buf->ops do not match the ttm_object_device's ops, but does so\nwithout releasing the reference acquired by dma_buf_get(). Any\nunprivileged renderD client passing a non-vmwgfx prime fd through the\nDRM_VMW_GB_SURFACE_REF{,_EXT} path leaks one dma_buf reference per\ncall and indefinitely pins the foreign exporter's GEM resources.\n\nFunnel the error path through the existing dma_buf_put() so the\nreference is always dropped."
}
],
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{
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"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"drivers/gpu/drm/vmwgfx/ttm_object.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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{
"version": "6.1.183",
"lessThanOrEqual": "6.1.*",
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"status": "unaffected"
},
{
"version": "6.6.151",
"lessThanOrEqual": "6.6.*",
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},
{
"version": "6.12.103",
"lessThanOrEqual": "6.12.*",
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{
"version": "6.18.44",
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{
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{
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"versionType": "original_commit_for_fix",
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}
]
}
],
"metrics": {
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{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-11-06T17:04:24.683206Z",
"id": "CVE-2026-80888",
"options": [
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{
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