发布于3月6日3月6日 Members Rocky Linux: CVE-2021-47356: kernel-rt (Multiple Advisories) Severity 4 CVSS (AV:L/AC:M/Au:N/C:P/I:P/A:P) Published 05/21/2024 Created 07/16/2024 Added 07/16/2024 Modified 11/18/2024 Description In the Linux kernel, the following vulnerability has been resolved: mISDN: fix possible use-after-free in HFC_cleanup() This module's remove path calls del_timer(). However, that function does not wait until the timer handler finishes. This means that the timer handler may still be running after the driver's remove function has finished, which would result in a use-after-free. Fix by calling del_timer_sync(), which makes sure the timer handler has finished, and unable to re-schedule itself. 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 References https://attackerkb.com/topics/cve-2021-47356 CVE - 2021-47356 https://errata.rockylinux.org/RLSA-2024:4211 https://errata.rockylinux.org/RLSA-2024:4352
