Security Hardening

Debian 13 — mailutils — multiple vulnerabilities (8 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — mailutils — multiple vulnerabilities (8 CVEs) — patch and remediation guide

  • February 27, 2026
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 27 February 2026 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2004-0984 CVE-2005-1520 CVE-2005-1521 CVE-2005-1522 CVE-2005-1523 CVE-2005-1824 CVE-2005-2878 CVE-2019-18862 Upstream summary: Unknown vulnerability in the dotlock implementation in mailutils before 1:0.5-4 on Debian GNU/Linux allows attackers to gain privileges. […]

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Red Hat Enterprise Linux 9 — python3.14 — multiple vulnerabilities (9 CVEs) — patch and remediation guide — diagnosis and fix on Red Hat Enterprise Linux 9

Red Hat Enterprise Linux 9 — python3.14 — multiple vulnerabilities (9 CVEs) — patch and remediation guide

  • February 27, 2026
  • Linux
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🟠 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-2026:19176 Related CVEs: CVE-2026-0865 CVE-2026-1502 CVE-2026-2297 CVE-2026-3644 CVE-2026-4224 CVE-2026-4519 CVE-2026-4786 CVE-2026-5713  +1 more Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage […]

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Debian 13 — shim — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — shim — multiple vulnerabilities (7 CVEs) — patch and remediation guide

  • February 27, 2026
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 27 February 2026 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2022-28737 CVE-2023-40546 CVE-2023-40547 CVE-2023-40548 CVE-2023-40549 CVE-2023-40550 CVE-2023-40551 Upstream summary: There's a possible overflow in handle_image() when shim tries to load and execute crafted EFI executables; The handle_image() function […]

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Debian 12 — glslang — vulnerability — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — glslang — vulnerability — patch and remediation guide

  • February 27, 2026
  • Linux
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🟢 Low   ⏱ 5–15 min  Last verified: 27 February 2026 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2025-3010 Upstream summary: A vulnerability, which was classified as problematic, has been found in Khronos Group glslang 15.1.0. Affected by this issue is the function glslang::TIntermediate::isConversionAllowed of the […]

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Ubuntu 18.04 — python-tornado — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — python-tornado — multiple vulnerabilities (7 CVEs) — patch and remediation guide

  • February 27, 2026
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 27 February 2026 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8198-1 Related CVEs: CVE-2026-31958 CVE-2026-35536 CVE-2025-67724 CVE-2025-67725 CVE-2025-67726 CVE-2023-28370 CVE-2024-52804 Upstream summary: It was discovered that Tornado incorrectly handled parsing of large multipart request bodies. An attacker could possibly use […]

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Ubuntu 22.04 — pyjwt — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — pyjwt — multiple vulnerabilities (3 CVEs) — patch and remediation guide

  • February 27, 2026
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 27 February 2026 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8133-1 Related CVEs: CVE-2026-32597 https://launchpad.net/bugs/1986487 CVE-2022-29217 Upstream summary: It was discovered that PyJWT did not validate the critical header parameter, contrary to the RFC specification expectations. A remote attacker could […]

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openSUSE Tumbleweed — libpq5 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — libpq5 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

  • February 27, 2026
  • Linux
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🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory SUSE-CU-2023:3807-1 (see also SUSE bugzilla) Related CVEs: CVE-2023-5869 CVE-2015-3165 CVE-2015-3166 CVE-2015-3167 CVE-2026-6473 CVE-2026-6475 CVE-2026-6476 CVE-2026-6477  +12 more Upstream summary: A flaw was found in PostgreSQL that allows authenticated database users to execute […]

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Ubuntu 22.04 — python-urllib3 — multiple vulnerabilities (10 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — python-urllib3 — multiple vulnerabilities (10 CVEs) — patch and remediation guide

  • February 27, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 27 February 2026 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7955-2 Related CVEs: CVE-2026-21441 https://bugs.launchpad.net/bugs/2138420 CVE-2025-66418 CVE-2025-66471 CVE-2025-50182 CVE-2025-50181 CVE-2024-37891 CVE-2018-25091  +2 more Upstream summary: USN-7955-1 fixed vulnerabilities in urllib3. The update introduced a regression in response streaming on Ubuntu […]

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

Ubuntu 20.04 — zulucrypt — vulnerability — patch and remediation guide

  • February 27, 2026
  • Linux
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🟢 Low   ⏱ 5–15 min  Last verified: 27 February 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8218-1 Related CVEs: CVE-2025-53391 Upstream summary: Aaron Rainbolt discovered that zuluCrypt used insecure PolicyKit settings in zuluPolkit. An attacker could possibly use this issue to cause local privilege escalation to […]

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

SLES 16 — libpixman — vulnerability — patch and remediation guide

  • February 27, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 27 February 2026 Affected versions: SLES 16 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2022:4148-1 (see also SUSE bugzilla) Related CVEs: CVE-2022-44638 Upstream summary: In libpixman in Pixman before 0.42.2, there is an out-of-bounds write (aka heap-based buffer overflow) in rasterize_edges_8 due to an integer overflow […]

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