Security Hardening

How to Configure Kerberos Client on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Configure Kerberos Client on RHEL 10

Introduction Setting up configure kerberos client on a RHEL 10 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Configure Kerberos Client on RHEL 10, with all the commands you need, the SELinux and firewalld considerations to keep in mind, and how to validate the […]

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Fedora 42 — xen — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Fedora 42

Fedora 42 — xen — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Fedora 42 📖 ~4 min read  •  Source: Fedora update FEDORA-2026-0c9aff64a5 Related CVEs: CVE-2026-23556 CVE-2026-23557 CVE-2026-23558 CVE-2025-54505 Upstream summary: oxenstored keeps quota related use counts across domain destruction [XSA-483, CVE-2026-23556] Xenstored DoS via XS_RESET_WATCHES command [XSA-484, CVE-2026-23557] grant table v2 race in […]

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SLES 16 — dpdk — multiple vulnerabilities (16 CVEs) — patch and remediation guide — diagnosis and fix on SLES 16

SLES 16 — dpdk — multiple vulnerabilities (16 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 28 February 2026 Affected versions: SLES 16 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2020:1334-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-10725 CVE-2020-14374 CVE-2020-14375 CVE-2020-14376 CVE-2020-14377 CVE-2020-14378 CVE-2024-11614 CVE-2025-23259  +8 more Upstream summary: A flaw was found in DPDK version 19.11 and above that allows a […]

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SLES 16 — uriparser — multiple vulnerabilities (8 CVEs) — patch and remediation guide — diagnosis and fix on SLES 16

SLES 16 — uriparser — multiple vulnerabilities (8 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 28 February 2026 Affected versions: SLES 16 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2019:0228-1 (see also SUSE bugzilla) Related CVEs: CVE-2018-19198 CVE-2018-19199 CVE-2018-20721 CVE-2018-19200 CVE-2024-34402 CVE-2024-34403 CVE-2021-46141 CVE-2021-46142 Upstream summary: An issue was discovered in uriparser before 0.9.0. UriQuery.c allows an out-of-bounds write via a […]

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SLES 16 — sudo — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on SLES 16

SLES 16 — sudo — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 28 February 2026 Affected versions: SLES 16 📖 ~4 min read  •  Source: SUSE advisory RHSA-2026:10758 (see also SUSE bugzilla) Related CVEs: CVE-2026-35535 CVE-2012-2337 CVE-2017-1000367 CVE-2017-1000368 CVE-2019-18634 CVE-2021-23240 CVE-2021-3156 CVE-2022-43995  +12 more Upstream summary: In Sudo through 1.9.17p2 before 3e474c2, a failure of a setuid, setgid, or […]

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Amazon Linux 2 — ruby — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — ruby — multiple vulnerabilities (20 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 ALAS2-2026-3284 Related CVEs: CVE-2026-41316 CVE-2024-47220 CVE-2021-33621 CVE-2017-17742 CVE-2019-15845 CVE-2019-16201 CVE-2019-16254 CVE-2019-16255  +12 more Upstream summary: ERB is a templating system for Ruby. Ruby 2.7.0 (before ERB 2.2.0 was published on […]

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FreeBSD 15 — grafana — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — grafana — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 28 February 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: Grafana — DingDing contact points exposed in Grafana Alerting Related CVEs: CVE-2018-558213 CVE-2021-39226 CVE-2021-41174 CVE-2021-41244 CVE-2021-43798 CVE-2021-43813 CVE-2021-43815 CVE-2022-21702  +12 more Upstream summary: Grafana Labs reports: An incident occurred where […]

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AlmaLinux 9 — buildah — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on AlmaLinux 9

AlmaLinux 9 — buildah — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 9 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2026:10135 Related CVEs: CVE-2026-34986 CVE-2025-61726 CVE-2025-61729 CVE-2025-68121 CVE-2025-47913 CVE-2025-52881 CVE-2025-58183 CVE-2024-11218  +12 more Upstream summary: The buildah package provides a tool for facilitating building OCI container images. Among other things, buildah enables […]

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Common Problems 113944

RHEL 10 – Boot Enters Emergency Mode Due to Invalid fstab UUID – Corrective Steps

🟠 High   ⏱ 5–30 min  Last verified: 27 February 2026 Affected versions: RHEL 10.0 RHEL 10.1 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related […]

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FreeBSD 15 — linux-c7-libssh — multiple vulnerabilities (9 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — linux-c7-libssh — multiple vulnerabilities (9 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 27 February 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: libssh2 — multiple issues Related CVEs: CVE-2019-3855 CVE-2019-3856 CVE-2019-3857 CVE-2019-3858 CVE-2019-3859 CVE-2019-3860 CVE-2019-3861 CVE-2019-3862  +1 more Upstream summary: libssh2 developers report: Defend against possible integer overflows in comp_method_zlib_decomp. Defend against […]

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