Security Hardening

Common Problems 116069

Ubuntu 26.04 LTS – chrony and systemd-timesyncd run together causing time flapping

🟡 Medium   ⏱ 5–30 min  Last verified: 27 May 2026 Affected versions: Ubuntu 26.04 LTS Ubuntu 26.04 Ubuntu 26.04.1 📖 ~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 […]

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Debian 13 — onevpl-intel-gpu — multiple vulnerabilities (10 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — onevpl-intel-gpu — multiple vulnerabilities (10 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 27 May 2026 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2023-22656 CVE-2023-45221 CVE-2023-47169 CVE-2023-47282 CVE-2023-48368 CVE-2023-48727 CVE-2024-21783 CVE-2024-21808  +2 more Upstream summary: Out-of-bounds read in Intel(R) Media SDK and some Intel(R) oneVPL software before version 23.3.5 may allow […]

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Red Hat Enterprise Linux 9 — sudo — vulnerability — patch and remediation guide — diagnosis and fix on Red Hat Enterprise Linux 9

Red Hat Enterprise Linux 9 — sudo — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Red Hat Enterprise Linux 9 📖 ~4 min read  •  Source: Red Hat advisory RHSA RHSA-2026:19220 Related CVEs: CVE-2026-35535 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative […]

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Ubuntu 22.04 — libvpx — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — libvpx — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 27 May 2026 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8053-1 Related CVEs: CVE-2026-2447 CVE-2025-5283 CVE-2024-5197 CVE-2023-44488 CVE-2023-5217 Upstream summary: It was discovered that libvpx did not properly handle certain malformed media files. If an application using libvpx opened a […]

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SLES 16 — vsftpd — vulnerability — patch and remediation guide — diagnosis and fix on SLES 16

SLES 16 — vsftpd — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 27 May 2026 Affected versions: SLES 16 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2015:0417-1 (see also SUSE bugzilla) Related CVEs: CVE-2015-1419 Upstream summary: Unspecified vulnerability in vsftpd 3.0.2 and earlier allows remote attackers to bypass access restrictions via unknown vectors, related to deny_file parsing. Table […]

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NetBSD 9.4 — polkit — multiple vulnerabilities (8 CVEs) — patch and remediation guide — diagnosis and fix on NetBSD 9.4

NetBSD 9.4 — polkit — multiple vulnerabilities (8 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: NetBSD 9.4 📖 ~4 min read  •  Source: pkgsrc audit-packages entry Related CVEs: CVE-2013-4288 CVE-2021-4034 CVE-2021-3560 CVE-2018-19788 CVE-2019-6133 CVE-2025-7519 CVE-2018-1116 CVE-2021-4115 Upstream summary: pkgsrc audit-packages flagged polkit<0.112 for vulnerability class 'privilege-escalation'. Reference: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4288 Table of contents Symptom & Impact Environment & Reproduction […]

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Common Problems 122572

Boot Delays Due to Missing Mount in fstab

🟡 Medium   ⏱ 5–30 min  Last verified: 27 May 2026 Affected versions: FreeBSD 14 📖 ~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 Errors & […]

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Windows Server 2019 — KB5087423 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Windows Server 2019

Windows Server 2019 — KB5087423 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2019 📖 ~4 min read  •  Source: Microsoft KB5087423 • MSRC update-guide entry Related CVEs: CVE-2026-35421 CVE-2026-41089 CVE-2026-32161 CVE-2026-40403 CVE-2026-21530 CVE-2026-33834 CVE-2026-33839 CVE-2026-34329  +12 more Affected components: Windows Server 2019 (Server Core installation) Microsoft summary: Heap-based buffer overflow in Windows […]

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SLES 16 — libneon27 — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on SLES 16

SLES 16 — libneon27 — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 27 May 2026 Affected versions: SLES 16 📖 ~4 min read  •  Source: SUSE advisory SUSE-SR:2007:002 (see also SUSE bugzilla) Related CVEs: CVE-2007-0157 CVE-2008-3746 CVE-2009-2473 CVE-2009-2474 Upstream summary: Array index error in the uri_lookup function in the URI parser for neon 0.26.0 to 0.26.2, possibly only on […]

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CHAT