Linux

How to Use Percona XtraBackup for MySQL Hot Backups on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Use Percona XtraBackup for MySQL Hot Backups on RHEL 9

Percona XtraBackup is the industry-standard open-source tool for online, non-blocking hot backups of MySQL and MariaDB InnoDB databases. Unlike mysqldump, which produces a logical SQL dump and requires more time for large databases, XtraBackup performs a physical backup — copying InnoDB data files directly while MySQL is running, without acquiring table locks that would block […]

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How to Configure Firewalld Zones and Rules on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Configure Firewalld Zones and Rules on RHEL 10

Introduction RHEL 10 ships with a stable, security-hardened base that makes deploying configure firewalld zones and rules both straightforward and auditable. This tutorial covers the complete procedure for how to Configure Firewalld Zones and Rules on RHEL 10, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for network-facing services. […]

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Debian 12 — fastd — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — fastd — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 15 November 2025 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-27638 CVE-2025-24356 Upstream summary: receive.c in fastd before v21 allows denial of service (assertion failure) when receiving packets with an invalid type code. Table of contents Symptom & […]

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Debian 13 — r-cran-gh — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — r-cran-gh — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 15 November 2025 Affected versions: Debian 13 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2025-54956 Upstream summary: The gh package before 1.5.0 for R delivers an HTTP response in a data structure that includes the Authorization header from the corresponding HTTP request. Table […]

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Rocky Linux 9 — sssd — vulnerability — patch and remediation guide — diagnosis and fix on Rocky Linux 9

Rocky Linux 9 — sssd — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Rocky Linux 9 📖 ~4 min read  •  Source: Rocky Linux RXSA RLSA-2025:20954 Related CVEs: CVE-2025-11561 Upstream summary: The System Security Services Daemon (SSSD) service provides a set of daemons to manage access to remote directories and authentication mechanisms. It also provides […]

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Debian 13 — fribidi — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — fribidi — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 15 November 2025 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2019-18397 CVE-2022-25308 CVE-2022-25309 CVE-2022-25310 Upstream summary: A buffer overflow in the fribidi_get_par_embedding_levels_ex() function in lib/fribidi-bidi.c of GNU FriBidi through 1.0.7 allows an attacker to cause a denial of […]

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Alpine Linux 3.20 — geary — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux 3.20

Alpine Linux 3.20 — geary — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.20 / fixed in 3.37.91-r0 📖 ~4 min read  •  Source: Alpine secdb entry — geary 3.37.91-r0 Related CVEs: CVE-2020-24661 Upstream summary: Alpine community repository for vv3.20 ships geary 3.37.91-r0 which addresses CVE-2020-24661. Table of contents Symptom & Impact Environment […]

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Debian 13 — node-growl — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — node-growl — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 15 November 2025 Affected versions: Debian 13 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2017-16042 Upstream summary: Growl adds growl notification support to nodejs. Growl before 1.10.2 does not properly sanitize input before passing it to exec, allowing for arbitrary command execution. Table […]

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Debian 13 — r-cran-readxl — multiple vulnerabilities (16 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — r-cran-readxl — multiple vulnerabilities (16 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 15 November 2025 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2017-12108 CVE-2017-12109 CVE-2017-12110 CVE-2017-12111 CVE-2017-2896 CVE-2017-2897 CVE-2017-2919 CVE-2018-20450  +8 more Upstream summary: An exploitable integer overflow vulnerability exists in the xls_preparseWorkSheet function of libxls 1.4 when handling a […]

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Debian 13 — libposix-2008-perl — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — libposix-2008-perl — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 15 November 2025 Affected versions: Debian 13 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2024-55564 Upstream summary: The POSIX::2008 package before 0.24 for Perl has a potential _execve50c env buffer overflow. Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis […]

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