Security Hardening

Debian 11 — xscreensaver — multiple vulnerabilities (10 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — xscreensaver — multiple vulnerabilities (10 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2003-0885 CVE-2003-1294 CVE-2003-1295 CVE-2004-2655 CVE-2007-1859 CVE-2007-5585 CVE-2011-2187 CVE-2015-8025  +2 more Upstream summary: Xscreensaver 4.14 contains certain debugging code that should have been omitted, which causes Xscreensaver to create […]

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Debian 11 — openblas — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — openblas — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2021-4048 Upstream summary: An out-of-bounds read flaw was found in the CLARRV, DLARRV, SLARRV, and ZLARRV functions in lapack through version 3.10.0, as also used in OpenBLAS before […]

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Debian 11 — libnbd — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — libnbd — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2019-14842 CVE-2021-20286 CVE-2022-0485 CVE-2023-5215 CVE-2024-7383 Upstream summary: Structured reply is a feature of the newstyle NBD protocol allowing the server to send a reply in chunks. A bounds […]

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Debian 11 — python-keyring — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — python-keyring — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2012-4571 CVE-2012-5577 CVE-2012-5578 Upstream summary: Python Keyring 0.9.1 does not securely initialize the cipher when encrypting passwords for CryptedFileKeyring files, which makes it easier for local users to […]

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Debian 11 — ulfius — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — ulfius — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2021-40540 Upstream summary: ulfius_uri_logger in Ulfius HTTP Framework before 2.7.4 omits con_info initialization and a con_info->request NULL check for certain malformed HTTP requests. Table of contents Symptom & […]

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Debian 12 — libcpanel-json-xs-perl — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — libcpanel-json-xs-perl — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2022-48623 CVE-2025-40929 Upstream summary: The Cpanel::JSON::XS package before 4.33 for Perl performs out-of-bounds accesses in a way that allows attackers to obtain sensitive information or cause a denial […]

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Debian 13 — evolution — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — evolution — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2002-1471 CVE-2002-1765 CVE-2003-0128 CVE-2003-0129 CVE-2003-0130 CVE-2003-0133 CVE-2003-0296 CVE-2005-0102  +12 more Upstream summary: The camel component for Ximian Evolution 1.0.x and earlier does not verify certificates when it establishes […]

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Debian 12 — libgit2 — multiple vulnerabilities (16 CVEs) — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — libgit2 — multiple vulnerabilities (16 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2014-9390 CVE-2016-10128 CVE-2016-10129 CVE-2016-10130 CVE-2016-8568 CVE-2016-8569 CVE-2018-10887 CVE-2018-10888  +8 more Upstream summary: Git before 1.8.5.6, 1.9.x before 1.9.5, 2.0.x before 2.0.5, 2.1.x before 2.1.4, and 2.2.x before 2.2.1 […]

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Debian 12 — ocaml-batteries — vulnerability — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — ocaml-batteries — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2017-17519 Upstream summary: batteriesConfig.mlp in OCaml Batteries Included (aka ocaml-batteries) 2.6 does not validate strings before launching the program specified by the BROWSER environment variable, which might allow […]

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

Debian 12 — psi — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2008-6393 Upstream summary: PSI Jabber client before 0.12.1 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a file transfer request […]

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