Security Hardening

Debian 12 — php-twig — multiple vulnerabilities (15 CVEs) — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — php-twig — multiple vulnerabilities (15 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 20 January 2026 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2022-23614 CVE-2022-39261 CVE-2024-45411 CVE-2024-51754 CVE-2024-51755 CVE-2025-24374 CVE-2026-24425 CVE-2026-46627  +7 more Upstream summary: Twig is an open source template language for PHP. When in a sandbox mode, the `arrow` […]

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Windows Server 2016 — KB5050187 — security update — patch and remediation guide — diagnosis and fix on Windows Server 2016

Windows Server 2016 — KB5050187 — security update — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Windows Server 2016 📖 ~4 min read  •  Source: Microsoft KB5050187 • MSRC update-guide entry Related CVEs: CVE-2025-21176 Affected components: Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2016 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis […]

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Debian 13 — libseccomp — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — libseccomp — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 20 January 2026 Affected versions: Debian 13 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2019-9893 Upstream summary: libseccomp before 2.4.0 did not correctly generate 64-bit syscall argument comparisons using the arithmetic operators (LT, GT, LE, GE), which might able to lead to bypassing […]

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Ubuntu 20.04 — opam — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — opam — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 20 January 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8256-1 Related CVEs: CVE-2026-41082 Upstream summary: Andrew Nesbitt discovered that opam did not properly validate file destination paths in package install files. An attacker could use this issue to bypass […]

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Ubuntu 24.04 — rustc-1.80 — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 24.04

Ubuntu 24.04 — rustc-1.80 — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 20 January 2026 Affected versions: Ubuntu 24.04 (noble) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8168-1 Related CVEs: CVE-2026-33056 Upstream summary: It was discovered that tar-rs embedded in rustc incorrectly handled symlinks when unpacking a tar archive. If a user or automated system were tricked […]

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Windows Server 2016 — KB5055518 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Windows Server 2016

Windows Server 2016 — KB5055518 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2016 📖 ~4 min read  •  Source: Microsoft KB5055518 • MSRC update-guide entry Related CVEs: CVE-2025-26663 CVE-2025-26686 CVE-2025-26670 CVE-2025-27491 CVE-2023-40547 CVE-2025-26665 CVE-2025-26669 CVE-2025-26668  +12 more Affected components: Windows Server 2016 Microsoft summary: Use after free in Windows LDAP – Lightweight […]

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

SLES 16 — kbd — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 20 January 2026 Affected versions: SLES 16 📖 ~4 min read  •  Source: SUSE advisory SUSE-SR:2011:007 Related CVEs: CVE-2011-0460 Upstream summary: The init script in kbd, possibly 1.14.1 and earlier, allows local users to overwrite arbitrary files via a symlink attack on /dev/shm/defkeymap.map. Table of contents Symptom […]

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SLES 16 — mozilla-nspr — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on SLES 16

SLES 16 — mozilla-nspr — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 20 January 2026 Affected versions: SLES 16 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2015:1926-1 (see also SUSE bugzilla) Related CVEs: CVE-2015-7183 CVE-2014-1545 Upstream summary: Integer overflow in the PL_ARENA_ALLOCATE implementation in Netscape Portable Runtime (NSPR) in Mozilla Network Security Services (NSS) before 3.19.2.1 and 3.20.x […]

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SLES 12 — fetchmail — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on SLES 12

SLES 12 — fetchmail — multiple vulnerabilities (7 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 20 January 2026 Affected versions: SLES 12 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2025:3845-1 (see also SUSE bugzilla) Related CVEs: CVE-2025-61962 CVE-2021-36386 CVE-2021-39272 CVE-2009-2666 CVE-2010-1167 CVE-2011-1947 CVE-2012-3482 Upstream summary: In fetchmail before 6.5.6, the SMTP client can crash when authenticating upon receiving a 334 status […]

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Red Hat Enterprise Linux 9 — nginx — multiple vulnerabilities (6 CVEs) — patch and remediation guide — diagnosis and fix on Red Hat Enterprise Linux 9

Red Hat Enterprise Linux 9 — nginx — multiple vulnerabilities (6 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Red Hat Enterprise Linux 9 📖 ~4 min read  •  Source: Red Hat advisory RHSA RHSA-2026:19374 Related CVEs: CVE-2026-42945 CVE-2026-27651 CVE-2026-27654 CVE-2026-27784 CVE-2026-32647 CVE-2026-1642 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – […]

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