Security Hardening

CentOS Stream 9 — python-tornado — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on CentOS Stream 9

CentOS Stream 9 — python-tornado — multiple vulnerabilities (5 CVEs) — patch and remediation guide

  • January 26, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 26 January 2026 Affected versions: CentOS Stream 9 📖 ~4 min read  •  Source: AlmaLinux/RHEL advisory ALSA-2025:8136 Related CVEs: CVE-2025-47287 CVE-2024-52804 CVE-2026-31958 CVE-2026-35536 CVE-2023-28370 Upstream summary: Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic […]

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openSUSE Leap 15.6 — xen — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Leap 15.6

openSUSE Leap 15.6 — xen — multiple vulnerabilities (20 CVEs) — patch and remediation guide

  • January 26, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Leap 15.6 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2026:0908-1 (see also SUSE bugzilla) Related CVEs: CVE-2026-23554 CVE-2026-23555 CVE-2025-27466 CVE-2025-58142 CVE-2025-58143 CVE-2025-27465 CVE-2024-31145 CVE-2024-31143  +12 more Upstream summary: The Intel EPT paging code uses an optimization to defer flushing of […]

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CentOS Stream 10 — python-pyasn1 — vulnerability — patch and remediation guide — diagnosis and fix on CentOS Stream 10

CentOS Stream 10 — python-pyasn1 — vulnerability — patch and remediation guide

  • January 26, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 26 January 2026 Affected versions: CentOS Stream 10 📖 ~4 min read  •  Source: AlmaLinux/RHEL advisory ALSA-2026:3354 Related CVEs: CVE-2026-23490 Upstream summary: Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces […]

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SLES 12 — xen — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on SLES 12

SLES 12 — xen — multiple vulnerabilities (20 CVEs) — patch and remediation guide

  • January 26, 2026
  • Linux
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🔴 Critical   ⏱ 15–90 min  Last verified: 26 January 2026 Affected versions: SLES 12 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2016:0010-1 (see also SUSE bugzilla) Related CVEs: CVE-2015-7512 CVE-2015-8104 CVE-2025-27465 CVE-2024-31145 CVE-2024-31143 CVE-2023-34326 CVE-2023-34322 CVE-2022-42332  +12 more Upstream summary: Buffer overflow in the pcnet_receive function in hw/net/pcnet.c in QEMU, when a guest […]

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SLES 16 — libct4 — vulnerability — patch and remediation guide — diagnosis and fix on SLES 16

SLES 16 — libct4 — vulnerability — patch and remediation guide

  • January 26, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 26 January 2026 Affected versions: SLES 16 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2020:1417-1 (see also SUSE bugzilla) Related CVEs: CVE-2019-13508 Upstream summary: FreeTDS through 1.1.11 has a Buffer Overflow. Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step […]

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

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

  • January 26, 2026
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Red Hat Enterprise Linux 8 📖 ~4 min read  •  Source: Red Hat advisory RHSA RHSA-2026:1852 Related CVEs: CVE-2025-14104 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 — libcpp-httplib0_22 — multiple vulnerabilities (10 CVEs) — patch and remediation guide — diagnosis and fix on SLES 16

SLES 16 — libcpp-httplib0_22 — multiple vulnerabilities (10 CVEs) — patch and remediation guide

  • January 26, 2026
  • Linux
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🔴 Critical   ⏱ 15–90 min  Last verified: 26 January 2026 Affected versions: SLES 16 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2026:20090-1 (see also SUSE bugzilla) Related CVEs: CVE-2025-66570 CVE-2026-21428 CVE-2026-28435 CVE-2025-53628 CVE-2025-53629 CVE-2025-46728 CVE-2026-22776 CVE-2026-28434  +2 more Upstream summary: cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.27.0, […]

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Red Hat Enterprise Linux 7 — libpng12 — vulnerability — patch and remediation guide — diagnosis and fix on Red Hat Enterprise Linux 7

Red Hat Enterprise Linux 7 — libpng12 — vulnerability — patch and remediation guide

  • January 26, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Red Hat Enterprise Linux 7 📖 ~4 min read  •  Source: Red Hat advisory RHSA RHSA-2026:7032 Related CVEs: CVE-2026-25646 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 20.04 — linux-ibm-5.15 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — linux-ibm-5.15 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

  • January 26, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 26 January 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8279-1 Related CVEs: CVE-2024-35862 CVE-2024-50060 CVE-2026-23274 CVE-2026-23351 CVE-2026-31419 CVE-2026-31431 CVE-2026-31504 CVE-2026-31533  +12 more Upstream summary: It was discovered that the Linux kernel algif_aead module did not properly handle in-place cryptographic […]

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Ubuntu 22.04 — unbound — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — unbound — multiple vulnerabilities (20 CVEs) — patch and remediation guide

  • January 26, 2026
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 26 January 2026 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8282-1 Related CVEs: CVE-2026-40622 CVE-2026-33278 CVE-2026-42923 CVE-2026-44390 CVE-2026-42944 CVE-2026-41292 CVE-2026-42959 CVE-2026-42960  +12 more Upstream summary: Andrew Griffiths discovered that Unbound did not properly handle certain DNSCrypt packets. A remote attacker […]

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