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 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 |
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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
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- version/linux linux kernel/4.14
- version/linux linux kernel/4.15
- version/linux linux kernel/4.20
- version/linux linux kernel/5.5
- version/linux linux kernel/5.11
- version/linux linux kernel/5.16
- version/linux linux kernel/5.17-rc1