CVE-2022-48887

2024-08-2107:15:05

Linux

web.nvd.nist.gov

linux kernel

drm/vmwgfx

user resources

rcu locks

performance profiles

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

AI Score

6.5

Confidence

Low

EPSS

Percentile

9.5%

JSON

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

drm/vmwgfx: Remove rcu locks from user resources

User resource lookups used rcu to avoid two extra atomics. Unfortunately
the rcu paths were buggy and it was easy to make the driver crash by
submitting command buffers from two different threads. Because the
lookups never show up in performance profiles replace them with a
regular spin lock which fixes the races in accesses to those shared
resources.

Fixes kernel oops’es in IGT’s vmwgfx execution_buffer stress test and
seen crashes with apps using shared resources.

Affected configurations

Nvd

Vulners

Node

linuxlinux_kernelRange4.20–6.1.7

linuxlinux_kernelMatch6.2rc1

linuxlinux_kernelMatch6.2rc2

linuxlinux_kernelMatch6.2rc3

VendorProductVersionCPE
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linuxlinux_kernel6.2cpe:2.3:o:linux:linux_kernel:6.2:rc1:*:*:*:*:*:*
linuxlinux_kernel6.2cpe:2.3:o:linux:linux_kernel:6.2:rc2:*:*:*:*:*:*
linuxlinux_kernel6.2cpe:2.3:o:linux:linux_kernel:6.2:rc3:*:*:*:*:*:*

Vendor	Product	Version	CPE
linux	linux_kernel	*	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	6.2	cpe:2.3:o:linux:linux_kernel:6.2:rc1::::::
linux	linux_kernel	6.2	cpe:2.3:o:linux:linux_kernel:6.2:rc2::::::
linux	linux_kernel	6.2	cpe:2.3:o:linux:linux_kernel:6.2:rc3::::::

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/ttm_object.c",
      "drivers/gpu/drm/vmwgfx/ttm_object.h",
      "drivers/gpu/drm/vmwgfx/vmwgfx_bo.c",
      "drivers/gpu/drm/vmwgfx/vmwgfx_drv.h",
      "drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c",
      "drivers/gpu/drm/vmwgfx/vmwgfx_resource.c"
    ],
    "versions": [
      {
        "version": "e14c02e6b699",
        "lessThan": "7ac9578e45b2",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "e14c02e6b699",
        "lessThan": "a309c7194e8a",
        "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/ttm_object.c",
      "drivers/gpu/drm/vmwgfx/ttm_object.h",
      "drivers/gpu/drm/vmwgfx/vmwgfx_bo.c",
      "drivers/gpu/drm/vmwgfx/vmwgfx_drv.h",
      "drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c",
      "drivers/gpu/drm/vmwgfx/vmwgfx_resource.c"
    ],
    "versions": [
      {
        "version": "4.20",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "4.20",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.7",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.2",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]