Alma Linux: CVE-2023-52439: Moderate: kernel update (Multiple Advisories)

Alma Linux: CVE-2023-52439: Moderate: kernel update (Multiple Advisories)

Severity

7

CVSS

(AV:L/AC:L/Au:S/C:C/I:C/A:C)

Published

02/20/2024

Created

06/07/2024

Added

06/06/2024

Modified

01/28/2025

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)

• alma-upgrade-bpftool
• alma-upgrade-kernel
• alma-upgrade-kernel-64k
• alma-upgrade-kernel-64k-core
• alma-upgrade-kernel-64k-debug
• alma-upgrade-kernel-64k-debug-core
• alma-upgrade-kernel-64k-debug-devel
• alma-upgrade-kernel-64k-debug-devel-matched
• alma-upgrade-kernel-64k-debug-modules
• alma-upgrade-kernel-64k-debug-modules-core
• alma-upgrade-kernel-64k-debug-modules-extra
• alma-upgrade-kernel-64k-devel
• alma-upgrade-kernel-64k-devel-matched
• alma-upgrade-kernel-64k-modules
• alma-upgrade-kernel-64k-modules-core
• alma-upgrade-kernel-64k-modules-extra
• alma-upgrade-kernel-abi-stablelists
• alma-upgrade-kernel-core
• alma-upgrade-kernel-cross-headers
• alma-upgrade-kernel-debug
• alma-upgrade-kernel-debug-core
• alma-upgrade-kernel-debug-devel
• alma-upgrade-kernel-debug-devel-matched
• alma-upgrade-kernel-debug-modules
• alma-upgrade-kernel-debug-modules-core
• alma-upgrade-kernel-debug-modules-extra
• alma-upgrade-kernel-debug-uki-virt
• alma-upgrade-kernel-devel
• alma-upgrade-kernel-devel-matched
• alma-upgrade-kernel-doc
• alma-upgrade-kernel-headers
• alma-upgrade-kernel-modules
• alma-upgrade-kernel-modules-core
• alma-upgrade-kernel-modules-extra
• alma-upgrade-kernel-rt
• alma-upgrade-kernel-rt-core
• alma-upgrade-kernel-rt-debug
• alma-upgrade-kernel-rt-debug-core
• alma-upgrade-kernel-rt-debug-devel
• alma-upgrade-kernel-rt-debug-kvm
• alma-upgrade-kernel-rt-debug-modules
• alma-upgrade-kernel-rt-debug-modules-core
• alma-upgrade-kernel-rt-debug-modules-extra
• alma-upgrade-kernel-rt-devel
• alma-upgrade-kernel-rt-kvm
• alma-upgrade-kernel-rt-modules
• alma-upgrade-kernel-rt-modules-core
• alma-upgrade-kernel-rt-modules-extra
• alma-upgrade-kernel-tools
• alma-upgrade-kernel-tools-libs
• alma-upgrade-kernel-tools-libs-devel
• alma-upgrade-kernel-uki-virt
• alma-upgrade-kernel-zfcpdump
• alma-upgrade-kernel-zfcpdump-core
• alma-upgrade-kernel-zfcpdump-devel
• alma-upgrade-kernel-zfcpdump-devel-matched
• alma-upgrade-kernel-zfcpdump-modules
• alma-upgrade-kernel-zfcpdump-modules-core
• alma-upgrade-kernel-zfcpdump-modules-extra
• alma-upgrade-libperf
• alma-upgrade-perf
• alma-upgrade-python3-perf
• alma-upgrade-rtla
• alma-upgrade-rv

References

• https://attackerkb.com/topics/cve-2023-52439
• CVE - 2023-52439
• https://errata.almalinux.org/8/ALSA-2024-3618.html
• https://errata.almalinux.org/8/ALSA-2024-3627.html
• https://errata.almalinux.org/9/ALSA-2024-6997.html