Rocky Linux: CVE-2023-52439: kernel-rt (Multiple Advisories)
Description
In the Linux kernel, the following vulnerability has been resolved: uio: Fix use-after-free in uio_open core-1 core-2 ------------------------------------------------------- uio_unregister_device uio_open idev = idr_find() device_unregister(&idev->dev) put_device(&idev->dev) uio_device_release get_device(&idev->dev) kfree(idev) uio_free_minor(minor) uio_release put_device(&idev->dev) kfree(idev) ------------------------------------------------------- In the core-1 uio_unregister_device(), the device_unregister will kfree idev when the idev->dev kobject ref is 1. But after core-1 device_unregister, put_device and before doing kfree, the core-2 may get_device. Then: 1. After core-1 kfree idev, the core-2 will do use-after-free for idev. 2. When core-2 do uio_release and put_device, the idev will be double freed. To address this issue, we can get idev atomic & inc idev reference with minor_lock.
Solution(s)
- rocky-upgrade-bpftool
- rocky-upgrade-bpftool-debuginfo
- rocky-upgrade-kernel
- rocky-upgrade-kernel-core
- rocky-upgrade-kernel-cross-headers
- rocky-upgrade-kernel-debug
- rocky-upgrade-kernel-debug-core
- rocky-upgrade-kernel-debug-debuginfo
- rocky-upgrade-kernel-debug-devel
- rocky-upgrade-kernel-debug-modules
- rocky-upgrade-kernel-debug-modules-extra
- rocky-upgrade-kernel-debuginfo
- rocky-upgrade-kernel-debuginfo-common-x86_64
- rocky-upgrade-kernel-devel
- rocky-upgrade-kernel-headers
- rocky-upgrade-kernel-modules
- rocky-upgrade-kernel-modules-extra
- rocky-upgrade-kernel-rt
- rocky-upgrade-kernel-rt-core
- rocky-upgrade-kernel-rt-debug
- rocky-upgrade-kernel-rt-debug-core
- rocky-upgrade-kernel-rt-debug-debuginfo
- rocky-upgrade-kernel-rt-debug-devel
- rocky-upgrade-kernel-rt-debug-kvm
- rocky-upgrade-kernel-rt-debug-modules
- rocky-upgrade-kernel-rt-debug-modules-extra
- rocky-upgrade-kernel-rt-debuginfo
- rocky-upgrade-kernel-rt-debuginfo-common-x86_64
- rocky-upgrade-kernel-rt-devel
- rocky-upgrade-kernel-rt-kvm
- rocky-upgrade-kernel-rt-modules
- rocky-upgrade-kernel-rt-modules-extra
- rocky-upgrade-kernel-tools
- rocky-upgrade-kernel-tools-debuginfo
- rocky-upgrade-kernel-tools-libs
- rocky-upgrade-kernel-tools-libs-devel
- rocky-upgrade-perf
- rocky-upgrade-perf-debuginfo
- rocky-upgrade-python3-perf
- rocky-upgrade-python3-perf-debuginfo
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