CVE-2022-48771high

CVE-2022-48771: high-severity vulnerability in Linux

drm/vmwgfx: Fix stale file descriptors on failed usercopy

Published · Updated

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.8epss 0.2%
exploitation probability
0.2%top 89% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
Linux · Linux
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References
https://git.kernel.org/stable/c/0008a0c78fc33a84e2212a7c04e6b21a36ca6f4dhttps://git.kernel.org/stable/c/1d833b27fb708d6fdf5de9f6b3a8be4bd4321565https://git.kernel.org/stable/c/6066977961fc6f437bc064f628cf9b0e4571c56chttps://git.kernel.org/stable/c/84b1259fe36ae0915f3d6ddcea6377779de48b82https://git.kernel.org/stable/c/a0f90c8815706981c483a652a6aefca51a5e191chttps://git.kernel.org/stable/c/ae2b20f27732fe92055d9e7b350abc5cdf3e2414https://git.kernel.org/stable/c/e8d092a62449dcfc73517ca43963d2b8f44d0516