Use After Free Affecting kernel-debug-modules package, versions <0:4.18.0-372.9.1.el8
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Test your applications- Snyk ID SNYK-RHEL8-KERNELDEBUGMODULES-8165814
- published 8 Oct 2024
- disclosed 20 Jun 2024
Introduced: 20 Jun 2024
CVE-2022-48771 Open this link in a new tabHow to fix?
Upgrade RHEL:8 kernel-debug-modules to version 0:4.18.0-372.9.1.el8 or higher.
This issue was patched in RHSA-2022:1988.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-debug-modules package and not the kernel-debug-modules package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
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.
References
- https://access.redhat.com/security/cve/CVE-2022-48771
- https://git.kernel.org/stable/c/0008a0c78fc33a84e2212a7c04e6b21a36ca6f4d
- https://git.kernel.org/stable/c/1d833b27fb708d6fdf5de9f6b3a8be4bd4321565
- https://git.kernel.org/stable/c/6066977961fc6f437bc064f628cf9b0e4571c56c
- https://git.kernel.org/stable/c/84b1259fe36ae0915f3d6ddcea6377779de48b82
- https://git.kernel.org/stable/c/a0f90c8815706981c483a652a6aefca51a5e191c
- https://git.kernel.org/stable/c/ae2b20f27732fe92055d9e7b350abc5cdf3e2414
- https://git.kernel.org/stable/c/e8d092a62449dcfc73517ca43963d2b8f44d0516