CVE-2022-48771

2024-06-2012:15:15

416baaa9-dc9f-4396-8d5f-8c081fb06d67

web.nvd.nist.gov

linux kernel

vulnerability

fix

stale file descriptors

usercopy

file descriptor table

use-after-free exploitation

6.5 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

10.4%

JSON

In the Linux kernel, the following vulnerability has been resolved:

drm/vmwgfx: Fix stale file descriptors on failed usercopy

A failing usercopy of the fence_rep object will lead to a stale entry in
the file descriptor table as put_unused_fd() won’t release it. This
enables userland to refer to a dangling ‘file’ object through that still
valid file descriptor, leading to all kinds of use-after-free
exploitation scenarios.

Fix this by deferring the call to fd_install() until after the usercopy
has succeeded.

Affected configurations

Vulners

Node

linuxlinux_kernelRange4.14–4.14.264

linuxlinux_kernelRange4.15.0–4.19.227

linuxlinux_kernelRange4.20.0–5.4.175

linuxlinux_kernelRange5.5.0–5.10.95

linuxlinux_kernelRange5.11.0–5.15.18

linuxlinux_kernelRange5.16.0–5.16.4

linuxlinux_kernelRange5.17.0≥

CNA 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_drv.h",
      "drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c",
      "drivers/gpu/drm/vmwgfx/vmwgfx_fence.c",
      "drivers/gpu/drm/vmwgfx/vmwgfx_kms.c"
    ],
    "versions": [
      {
        "version": "c906965dee22",
        "lessThan": "e8d092a62449",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "c906965dee22",
        "lessThan": "0008a0c78fc3",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "c906965dee22",
        "lessThan": "84b1259fe36a",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "c906965dee22",
        "lessThan": "ae2b20f27732",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "c906965dee22",
        "lessThan": "6066977961fc",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "c906965dee22",
        "lessThan": "1d833b27fb70",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "c906965dee22",
        "lessThan": "a0f90c881570",
        "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_drv.h",
      "drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c",
      "drivers/gpu/drm/vmwgfx/vmwgfx_fence.c",
      "drivers/gpu/drm/vmwgfx/vmwgfx_kms.c"
    ],
    "versions": [
      {
        "version": "4.14",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "4.14",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.14.264",
        "lessThanOrEqual": "4.14.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.19.227",
        "lessThanOrEqual": "4.19.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.175",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.95",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.18",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.16.4",
        "lessThanOrEqual": "5.16.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.17",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]