CVE-2022-48771: drm/vmwgfx: Fix stale file descriptors on failed usercopy
First published: Thu Jun 20 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=4.14<4.14.264 | |
| Linux Kernel | >=4.15<4.19.227 | |
| Linux Kernel | >=4.20<5.4.175 | |
| Linux Kernel | >=5.5<5.10.95 | |
| Linux Kernel | >=5.11<5.15.18 | |
| Linux Kernel | >=5.16<5.16.4 | |
| Linux Kernel | =5.17-rc1 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://git.kernel.org/stable/c/e8d092a62449dcfc73517ca43963d2b8f44d0516
- https://git.kernel.org/stable/c/0008a0c78fc33a84e2212a7c04e6b21a36ca6f4d
- https://git.kernel.org/stable/c/84b1259fe36ae0915f3d6ddcea6377779de48b82
- https://git.kernel.org/stable/c/ae2b20f27732fe92055d9e7b350abc5cdf3e2414
- https://git.kernel.org/stable/c/6066977961fc6f437bc064f628cf9b0e4571c56c
- https://git.kernel.org/stable/c/1d833b27fb708d6fdf5de9f6b3a8be4bd4321565
- https://git.kernel.org/stable/c/a0f90c8815706981c483a652a6aefca51a5e191c
Frequently Asked Questions
What is the severity of CVE-2022-48771?
CVE-2022-48771 is classified as a medium severity vulnerability due to its potential to lead to a stale entry in the file descriptor table.
What software is affected by CVE-2022-48771?
CVE-2022-48771 affects several versions of the Linux kernel, specifically from 4.14 up to version 5.17-rc1.
How do I fix CVE-2022-48771?
To fix CVE-2022-48771, you should update your Linux kernel to a patched version that addresses this vulnerability.
What type of vulnerability is CVE-2022-48771?
CVE-2022-48771 is a vulnerability in the drm/vmwgfx subsystem of the Linux kernel.
What are the potential impacts of CVE-2022-48771?
CVE-2022-48771 could lead to userland applications encountering stale file descriptors, which may cause unexpected behavior.
- agent/title
- agent/references
- agent/weakness
- agent/type
- agent/description
- agent/first-publish-date
- agent/author
- agent/event
- collector/mitre-cve
- source/MITRE
- agent/remedy
- agent/last-modified-date
- agent/severity
- agent/softwarecombine
- agent/source
- agent/tags
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- agent/software-canonical-lookup-request
- vendor/linux
- canonical/linux kernel
- version/linux kernel/4.14
- version/linux kernel/4.15
- version/linux kernel/4.20
- version/linux kernel/5.5
- version/linux kernel/5.11
- version/linux kernel/5.16
- version/linux kernel/5.17-rc1