CVE-2022-48771
Last modified
CVE-2022-48771 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.. EPSS estimates a 0.21% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Linux | Linux Kernel | >= 4.14, < 4.14.264 | — |
| Linux | Linux Kernel | >= 4.15, < 4.19.227 | — |
| Linux | Linux Kernel | >= 4.20, < 5.4.175 | — |
| Linux | Linux Kernel | >= 5.5, < 5.10.95 | — |
| Linux | Linux Kernel | >= 5.11, < 5.15.18 | — |
| Linux | Linux Kernel | >= 5.16, < 5.16.4 | — |
| Linux | Linux Kernel | 5.17 | Rc1 |
References
Timeline
- Published
- Last Modified
- Status
- Modified
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