CVE-2026-74442
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: drm/vmwgfx: avoid destroy_workqueue(NULL) on vkms init failure Two paths through vmw_vkms_init() can leave vmw->crc_workq NULL while still leaving the rest of the driver in a state that calls vmw_vkms_cleanup() at module unload: 1. vmw_host_get_guestinfo(GUESTINFO_VBLANK, ...) failing or returning an oversized buffer -- the common case on hosts without a VBLANK guestinfo entry -- early-returned before the workqueue allocation. 2. alloc_ordered_workqueue() returning NULL on memory pressure. vmw_vkms_cleanup() then calls destroy_workqueue(NULL), which dereferences wq->name and panics. Fix the first case by removing the early return: vmw->vkms_enabled is already false on the rpci-failure path so no work will ever be queued, and allocating the workqueue unconditionally keeps the control flow simple. Fix the second case by guarding the cleanup with a NULL check, since alloc_ordered_workqueue() can still fail under low memory.
View original CVE JSON
{
"id": "CVE-2026-74442",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-08-15T13:17:48.760",
"lastModified": "2026-11-06T17:19:48.197",
"vulnStatus": "Received",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vmwgfx: avoid destroy_workqueue(NULL) on vkms init failure\n\nTwo paths through vmw_vkms_init() can leave vmw->crc_workq NULL while\nstill leaving the rest of the driver in a state that calls\nvmw_vkms_cleanup() at module unload:\n\n 1. vmw_host_get_guestinfo(GUESTINFO_VBLANK, ...) failing or\n returning an oversized buffer -- the common case on hosts\n without a VBLANK guestinfo entry -- early-returned before the\n workqueue allocation.\n 2. alloc_ordered_workqueue() returning NULL on memory pressure.\n\nvmw_vkms_cleanup() then calls destroy_workqueue(NULL), which\ndereferences wq->name and panics.\n\nFix the first case by removing the early return: vmw->vkms_enabled\nis already false on the rpci-failure path so no work will ever be\nqueued, and allocating the workqueue unconditionally keeps the\ncontrol flow simple. Fix the second case by guarding the cleanup\nwith a NULL check, since alloc_ordered_workqueue() can still fail\nunder low memory."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"drivers/gpu/drm/vmwgfx/vmwgfx_vkms.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "7b0062036c3b71b4a69e244ecf0502c06c4cf5f0",
"lessThan": "7c701778c6a369769992614dac8dc00c8ac72afc",
"versionType": "git",
"status": "affected"
},
{
"version": "7b0062036c3b71b4a69e244ecf0502c06c4cf5f0",
"lessThan": "96efee36453b697ccbaf75091b7a1807c11809dd",
"versionType": "git",
"status": "affected"
},
{
"version": "7b0062036c3b71b4a69e244ecf0502c06c4cf5f0",
"lessThan": "0ee0532f1d405d37f38c44cbba87342e63d3bbd4",
"versionType": "git",
"status": "affected"
},
{
"version": "7b0062036c3b71b4a69e244ecf0502c06c4cf5f0",
"lessThan": "05eaa887e7b4f40fba425f8a1d7a5a8a043092a6",
"versionType": "git",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"drivers/gpu/drm/vmwgfx/vmwgfx_vkms.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "6.10",
"status": "affected"
},
{
"version": "0",
"lessThan": "6.10",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.103",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18.44",
"lessThanOrEqual": "6.18.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.1.8",
"lessThanOrEqual": "7.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.2",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-11-06T16:57:19.019172Z",
"id": "CVE-2026-74442",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"references": [
{
"url": "https://git.kernel.org/stable/c/05eaa887e7b4f40fba425f8a1d7a5a8a043092a6",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/0ee0532f1d405d37f38c44cbba87342e63d3bbd4",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/7c701778c6a369769992614dac8dc00c8ac72afc",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/96efee36453b697ccbaf75091b7a1807c11809dd",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
]
}