Alma Linux: CVE-2021-47321: Important: kernel security update (Multiple Advisories)
Description
In the Linux kernel, the following vulnerability has been resolved: watchdog: Fix possible use-after-free by calling del_timer_sync() This driver'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)
- 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
- Lightweight Endpoint Agent
- Live Dashboards
- Real Risk Prioritization
- IT-Integrated Remediation Projects
- Cloud, Virtual, and Container Assessment
- Integrated Threat Feeds
- Easy-to-Use RESTful API
- Automation-Assisted Patching
- Automated Containment
With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.
– Scott Cheney, Manager of Information Security, Sierra View Medical Center