Common Problems

Ubuntu 20.04 — avahi — multiple vulnerabilities (13 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — avahi — multiple vulnerabilities (13 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 3 July 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8269-1 Related CVEs: CVE-2026-24401 CVE-2026-34933 CVE-2025-68276 CVE-2025-68468 CVE-2025-68471 CVE-2023-38469 CVE-2023-38470 CVE-2023-38471  +5 more Upstream summary: It is discovered that Avahi incorrectly handled crafted input. A remote attacker could possibly use […]

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AlmaLinux 8 — squid — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — squid — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2023:7213 Related CVEs: CVE-2023-46846 CVE-2023-46847 CVE-2026-32748 CVE-2026-33526 CVE-2025-62168 CVE-2024-23638 CVE-2024-45802 CVE-2023-50269  +12 more Upstream summary: Squid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data objects. […]

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Common Problems 115969

Ubuntu 26.04 LTS – nftables backend conflicts with legacy iptables scripts

🟡 Medium   ⏱ 5–30 min  Last verified: 2 July 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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AlmaLinux 10 — kea — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on AlmaLinux 10

AlmaLinux 10 — kea — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 10 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2026:7342 Related CVEs: CVE-2026-3608 CVE-2025-11232 CVE-2025-32801 CVE-2025-32802 CVE-2025-32803 Upstream summary: DHCP implementation from Internet Systems Consortium, Inc. that features fully functional DHCPv4, DHCPv6 and Dynamic DNS servers. Both DHCP servers fully support […]

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Common Problems 115903

Fix Broken Dependencies After Upgrading to Ubuntu 26.04 LTS

🟠 High   ⏱ 5–30 min  Last verified: 2 July 2026 Affected versions: 26.04 📖 ~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 & Cross-Refs […]

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Windows Server 2025 — KB5073696 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Windows Server 2025

Windows Server 2025 — KB5073696 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Windows Server 2025 📖 ~4 min read  •  Source: Microsoft KB5073696 • MSRC update-guide entry Related CVEs: CVE-2026-21265 CVE-2026-0386 CVE-2026-20805 CVE-2026-20809 CVE-2026-20816 CVE-2026-20820 CVE-2026-20821 CVE-2026-20824  +12 more Affected components: Windows Server 2025 Microsoft summary: Windows Secure Boot stores Microsoft certificates in the […]

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Common Problems 115896

APT Lock Contention During Package Operations

🟡 Medium   ⏱ 5–30 min  Last verified: 2 July 2026 📖 ~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 & Cross-Refs References & Further […]

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FreeBSD 15 — apache-peruser — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — apache-peruser — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 2 July 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: Apache — Insecure LD_LIBRARY_PATH handling Related CVEs: CVE-2011-3192 CVE-2012-0883 Upstream summary: Apache reports: Insecure handling of LD_LIBRARY_PATH was found that could lead to the current working directory to be searched […]

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Windows Server 2025 — KB5087539 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Windows Server 2025

Windows Server 2025 — KB5087539 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2025 📖 ~4 min read  •  Source: Microsoft KB5087539 • MSRC update-guide entry Related CVEs: CVE-2026-35421 CVE-2026-41089 CVE-2026-41096 CVE-2026-32161 CVE-2026-40403 CVE-2026-21530 CVE-2026-33834 CVE-2026-33839  +12 more Affected components: Windows Server 2025 Microsoft summary: Heap-based buffer overflow in Windows GDI allows an […]

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FreeBSD 15 — keycloak — multiple vulnerabilities (10 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — keycloak — multiple vulnerabilities (10 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 2 July 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: keycloak — Multiple security fixes Related CVEs: CVE-2021-10039 CVE-2021-10270 CVE-2021-10451 CVE-2021-10492 CVE-2021-44549 CVE-2021-9666 CVE-2022-40151 CVE-2022-41966  +2 more Upstream summary: Keycloak reports: This update includes 2 security fixes: CVE-2024-11734: Unrestricted admin […]

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