Linux

Common Problems 114117

RHEL 10 – Postfix starts but mail remains deferred due to SELinux policy denial – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 16 November 2025 Affected versions: RHEL 10 📖 ~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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Ubuntu 22.04 — node-sha.js — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — node-sha.js — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 16 November 2025 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7778-1 Related CVEs: CVE-2025-9288 Upstream summary: Nikita Skovoroda discovered that sha.js did not properly handle certain inputs. An attacker could possibly use this issue to manipulate the internal state of […]

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Ubuntu 22.04 — simgear — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — simgear — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 16 November 2025 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7965-1 Related CVEs: CVE-2025-0781 Upstream summary: It was discovered that SimGear could be made to bypass the sandboxing of Nasal scripts. An attacker could possibly use this issue to execute […]

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Ubuntu 22.04 — erlang — multiple vulnerabilities (10 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — erlang — multiple vulnerabilities (10 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 16 November 2025 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7831-1 Related CVEs: CVE-2025-48041 CVE-2025-48038 CVE-2025-48040 CVE-2025-48039 CVE-2025-46712 CVE-2025-4748 CVE-2025-32433 CVE-2025-30211  +2 more Upstream summary: It was discovered that Erlang incorrectly handled resource allocation and consumption in the SFTP SSH […]

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Red Hat Enterprise Linux 8 — gnupg2 — vulnerability — patch and remediation guide — diagnosis and fix on Red Hat Enterprise Linux 8

Red Hat Enterprise Linux 8 — gnupg2 — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Red Hat Enterprise Linux 8 📖 ~4 min read  •  Source: Red Hat advisory RHSA RHSA-2026:1468 Related CVEs: CVE-2025-68973 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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SLES 16 — python313-Pygments — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on SLES 16

SLES 16 — python313-Pygments — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 16 November 2025 Affected versions: SLES 16 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2021:1500-1 (see also SUSE bugzilla) Related CVEs: CVE-2021-20270 CVE-2021-27291 Upstream summary: An infinite loop in SMLLexer in Pygments versions 1.5 to 2.7.3 may lead to denial of service when performing syntax highlighting […]

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

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

🟠 High   ⏱ 15–60 min  Last verified: 16 November 2025 Affected versions: SLES 16 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2021:3582-1 (see also SUSE bugzilla) Related CVEs: CVE-2021-42781 CVE-2021-42782 CVE-2023-40660 CVE-2008-2235 CVE-2009-0368 CVE-2010-4523 CVE-2018-16391 CVE-2018-16392  +12 more Upstream summary: Heap buffer overflow issues were found in Opensc before version 0.22.0 in pkcs15-oberthur.c […]

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SLES 15 — go1.22 — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — go1.22 — multiple vulnerabilities (7 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 16 November 2025 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2025:01731-1 (see also SUSE bugzilla) Related CVEs: CVE-2025-22866 CVE-2024-45336 CVE-2024-45341 CVE-2024-34155 CVE-2024-34156 CVE-2024-34158 CVE-2024-24788 Upstream summary: Due to the usage of a variable time instruction in the assembly implementation of an internal […]

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Oracle Linux 9 — python3.9 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — python3.9 — vulnerability — patch and remediation guide (ELSA-2026-1478)

🟡 Medium   ⏱ 10–30 min  Last verified: 16 November 2025 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2026-1478 Related CVEs: CVE-2025-12084 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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Oracle Linux 9 — grub2 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — grub2 — vulnerability — patch and remediation guide (ELSA-2025-2867)

🟠 High   ⏱ 15–60 min  Last verified: 16 November 2025 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2025-2867 Related CVEs: CVE-2025-0624 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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