Linux

Amazon Linux 2 — rsyslog — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — rsyslog — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2-2022-1803 Related CVEs: CVE-2014-3634 CVE-2022-24903 CVE-2019-17041 CVE-2019-17042 CVE-2018-16881 Upstream summary: A flaw was found in the way rsyslog handled invalid log message priority values. In certain configurations, a local attacker, […]

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CentOS Stream 9 — python-wheel — vulnerability — patch and remediation guide — diagnosis and fix on CentOS Stream 9

CentOS Stream 9 — python-wheel — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 7 March 2022 Affected versions: CentOS Stream 9 📖 ~4 min read  •  Source: AlmaLinux/RHEL advisory ALSA-2023:6712 Related CVEs: CVE-2022-40898 Upstream summary: Wheel is the reference implementation of the Python wheel packaging standard, as defined in PEP 427. Security Fix(es): * python-wheel: remote attackers can cause denial […]

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How to Manage Users and Groups on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Manage Users and Groups on Debian 11

Introduction How to Manage Users and Groups on Debian 11 is a fundamental operation for any administrator maintaining a Debian 11 Bullseye server. Debian 11 Bullseye ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian 11. […]

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SLES 12 — tk — vulnerability — patch and remediation guide — diagnosis and fix on SLES 12

SLES 12 — tk — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 7 March 2022 Affected versions: SLES 12 📖 ~4 min read  •  Source: SUSE advisory SUSE-FU-2022:0484-1 (see also SUSE bugzilla) Related CVEs: CVE-2021-35331 Upstream summary: In Tcl 8.6.11, a format string vulnerability in nmakehlp.c might allow code execution via a crafted file. NOTE: multiple third parties dispute […]

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How to Configure DRBD for High-Availability Storage on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Configure DRBD for High-Availability Storage on RHEL 7

How to Configure DRBD for High-Availability Storage on RHEL 7 Distributed Replicated Block Device (DRBD) is a Linux kernel module and set of user-space utilities that provide synchronous block-level replication between two servers over a network. It is often described as a network-based RAID-1 and is widely used as the storage layer in high-availability clusters […]

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How to Configure SELinux Boolean Settings on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Configure SELinux Boolean Settings on CentOS Stream 9

Introduction CentOS Stream 9 ships with a stable, security-hardened base that makes deploying configure selinux boolean settings on centos stream 9 both straightforward and auditable. This tutorial covers the complete procedure for how to Configure SELinux Boolean Settings on CentOS Stream 9, including dnf module streams where applicable, systemd unit management, and the firewalld rules […]

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AlmaLinux 8 — libcacard — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — libcacard — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALBA-2019:3785 Upstream summary: The libcacard packages contain the Common Access Card (CAC) emulation library. This update fixes the following bug: * Backport the patch removing key caching to unbreak libcacard for CI […]

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AlmaLinux 8 — userspace-rcu — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — userspace-rcu — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALBA-2021:1731 Upstream summary: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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Debian 11 — e2fsprogs — multiple vulnerabilities (6 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — e2fsprogs — multiple vulnerabilities (6 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 6 March 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2007-5497 CVE-2015-0247 CVE-2015-1572 CVE-2019-5094 CVE-2019-5188 CVE-2022-1304 Upstream summary: Multiple integer overflows in libext2fs in e2fsprogs before 1.40.3 allow user-assisted remote attackers to execute arbitrary code via a crafted […]

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How to Install Nginx on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Install Nginx on Debian 11 (DEBIAN-11-2)

Introduction Debian 11 Bullseye is built around the ethos of stability and free software. Setting up install nginx on debian 11 on Bullseye leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Bullseye freeze. Follow each step carefully and the resulting […]

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