335 lines
16 KiB
JSON
335 lines
16 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2022-48771",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-06-20T11:09:39.061Z",
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"datePublished": "2024-06-20T11:13:45.896Z",
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"dateUpdated": "2026-08-05T08:52:12.077Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T08:52:12.077Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vmwgfx: Fix stale file descriptors on failed usercopy\n\nA failing usercopy of the fence_rep object will lead to a stale entry in\nthe file descriptor table as put_unused_fd() won't release it. This\nenables userland to refer to a dangling 'file' object through that still\nvalid file descriptor, leading to all kinds of use-after-free\nexploitation scenarios.\n\nFix this by deferring the call to fd_install() until after the usercopy\nhas succeeded."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The vulnerability is reached via the local DRM ioctl DRM_IOCTL_VMW_EXECBUF on the vmwgfx device (/dev/dri/renderD* or card*), not via network or adjacent protocols.\nAC:L - An attacker reliably triggers the bug by setting EXPORT_FENCE_FD and passing an invalid fence_rep userspace pointer so copy_to_user fails after fd_install; no race or external condition is required.\nPR:L - VMW_EXECBUF is DRM_RENDER_ALLOW on a DRIVER_RENDER device, so an unprivileged local user who can open the render node (no DRM master/auth) can invoke the path.\nUI:N - Exploitation requires only the attacker's own ioctl; no victim action is needed.\nS:U - Impact is local kernel memory corruption / privilege escalation within the same OS security authority; this is not a VM escape or cross-boundary break of vmwgfx's guest GPU interface.\nC:H - The stale FD yields a use-after-free on struct file that can be reclaimed and abused for arbitrary kernel memory disclosure.\nI:H - The same struct file UAF enables heap manipulation and arbitrary write / control-flow hijacking as described in the fix commit.\nA:H - Use-after-free of the file object can cause kernel oops/panic even without a full exploit, so availability impact is high."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/gpu/drm/vmwgfx/vmwgfx_drv.h",
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"drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c",
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"drivers/gpu/drm/vmwgfx/vmwgfx_fence.c",
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"drivers/gpu/drm/vmwgfx/vmwgfx_kms.c"
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],
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"versions": [
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"defaultStatus": "affected",
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"programFiles": [
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"drivers/gpu/drm/vmwgfx/vmwgfx_drv.h",
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"drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c",
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"drivers/gpu/drm/vmwgfx/vmwgfx_fence.c",
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"drivers/gpu/drm/vmwgfx/vmwgfx_kms.c"
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],
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"versions": [
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{
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"version": "4.14",
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"status": "affected"
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{
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"version": "0",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "4.14.264",
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"lessThanOrEqual": "4.14.*",
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"status": "unaffected",
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},
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{
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"version": "4.19.227",
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"status": "unaffected",
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},
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"version": "5.4.175",
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"lessThanOrEqual": "5.4.*",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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},
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{
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"version": "5.16.4",
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"lessThanOrEqual": "5.16.*",
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"status": "unaffected",
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},
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{
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"version": "5.17",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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"role": "CISA Coordinator",
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