发布于3月6日3月6日 Members Alma Linux: CVE-2023-52811: Important: kernel security update (Multiple Advisories) Severity 4 CVSS (AV:L/AC:M/Au:N/C:P/I:P/A:P) Published 05/21/2024 Created 08/13/2024 Added 08/12/2024 Modified 09/20/2024 Description In the Linux kernel, the following vulnerability has been resolved: scsi: ibmvfc: Remove BUG_ON in the case of an empty event pool In practice the driver should never send more commands than are allocated to a queue's event pool. In the unlikely event that this happens, the code asserts a BUG_ON, and in the case that the kernel is not configured to crash on panic returns a junk event pointer from the empty event list causing things to spiral from there. This BUG_ON is a historical artifact of the ibmvfc driver first being upstreamed, and it is well known now that the use of BUG_ON is bad practice except in the most unrecoverable scenario. There is nothing about this scenario that prevents the driver from recovering and carrying on. Remove the BUG_ON in question from ibmvfc_get_event() and return a NULL pointer in the case of an empty event pool. Update all call sites to ibmvfc_get_event() to check for a NULL pointer and perfrom the appropriate failure or recovery action. Solution(s) alma-upgrade-bpftool alma-upgrade-kernel 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-modules alma-upgrade-kernel-debug-modules-extra alma-upgrade-kernel-devel alma-upgrade-kernel-doc alma-upgrade-kernel-headers alma-upgrade-kernel-modules 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-extra alma-upgrade-kernel-rt-devel alma-upgrade-kernel-rt-kvm alma-upgrade-kernel-rt-modules alma-upgrade-kernel-rt-modules-extra alma-upgrade-kernel-tools alma-upgrade-kernel-tools-libs alma-upgrade-kernel-tools-libs-devel alma-upgrade-kernel-zfcpdump alma-upgrade-kernel-zfcpdump-core alma-upgrade-kernel-zfcpdump-devel alma-upgrade-kernel-zfcpdump-modules alma-upgrade-kernel-zfcpdump-modules-extra alma-upgrade-perf alma-upgrade-python3-perf References https://attackerkb.com/topics/cve-2023-52811 CVE - 2023-52811 https://errata.almalinux.org/8/ALSA-2024-5101.html https://errata.almalinux.org/8/ALSA-2024-5102.html
