CVE-2022-48771
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.21%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.21% probability · 12th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/0008a0c78fc33a84e2212a7c04e6b21a36ca6f4dPatch
- https://git.kernel.org/stable/c/1d833b27fb708d6fdf5de9f6b3a8be4bd4321565Patch
- https://git.kernel.org/stable/c/6066977961fc6f437bc064f628cf9b0e4571c56cPatch
- https://git.kernel.org/stable/c/84b1259fe36ae0915f3d6ddcea6377779de48b82Patch
- https://git.kernel.org/stable/c/a0f90c8815706981c483a652a6aefca51a5e191cPatch
- https://git.kernel.org/stable/c/ae2b20f27732fe92055d9e7b350abc5cdf3e2414Patch
- https://git.kernel.org/stable/c/e8d092a62449dcfc73517ca43963d2b8f44d0516Patch
- https://git.kernel.org/stable/c/0008a0c78fc33a84e2212a7c04e6b21a36ca6f4dPatch
- https://git.kernel.org/stable/c/1d833b27fb708d6fdf5de9f6b3a8be4bd4321565Patch
- https://git.kernel.org/stable/c/6066977961fc6f437bc064f628cf9b0e4571c56cPatch
- https://git.kernel.org/stable/c/84b1259fe36ae0915f3d6ddcea6377779de48b82Patch
- https://git.kernel.org/stable/c/a0f90c8815706981c483a652a6aefca51a5e191cPatch
- https://git.kernel.org/stable/c/ae2b20f27732fe92055d9e7b350abc5cdf3e2414Patch
- https://git.kernel.org/stable/c/e8d092a62449dcfc73517ca43963d2b8f44d0516Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.