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Azul Zulu Java Multiple Vulnerabilities (2026-01-20)

high Nessus Plugin ID 294803

Synopsis

Azul Zulu OpenJDK is affected by multiple vulnerabilities.

Description

The version of Azul Zulu installed on the remote host is 6 prior to 6.77.0.12 / 7 prior to 7.83.0.12 / 8 prior to 8.91.0.12 / 11 prior to 11.85.12 / 17 prior to 17.63.12 / 21 prior to 21.47.14 / 25 prior to 25.31.14. It is, therefore, affected by multiple vulnerabilities as referenced in the 2026-01-20 advisory.

 - A flaw was found in how GLib's GString manages memory when adding data to strings. If a string is already very large, combining it with more input can cause a hidden overflow in the size calculation. This makes the system think it has enough memory when it doesn't. As a result, data may be written past the end of the allocated memory, leading to crashes or memory corruption. (CVE-2025-6052)

 - A flaw was found in libxml2's xmlBuildQName function, where integer overflows in buffer size calculations can lead to a stack-based buffer overflow. This issue can result in memory corruption or a denial of service when processing crafted input. (CVE-2025-6021)

 - A flaw was found in libxslt where the attribute type, atype, flags are modified in a way that corrupts internal memory management. When XSLT functions, such as the key() process, result in tree fragments, this corruption prevents the proper cleanup of ID attributes. As a result, the system may access freed memory, causing crashes or enabling attackers to trigger heap corruption. (CVE-2025-7425)

 - A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26, iOS 26 and iPadOS 26. Processing maliciously crafted web content may lead to an unexpected Safari crash.
 (CVE-2025-43368)

 - In GStreamer through 1.26.1, the isomp4 plugin's qtdemux_parse_trak function may read past the end of a heap buffer while parsing an MP4 file, possibly leading to information disclosure. (CVE-2025-47219)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Apply the appropriate patch according to the January 2026 Azul Zulu OpenJDK Patch Update advisory.

See Also

https://docs.azul.com/core/release/january-2026/release-notes

Plugin Details

Severity: High

ID: 294803

File Name: azul_zulu_25_32_17.nasl

Version: 1.1

Type: local

Agent: windows, macosx, unix

Family: Misc.

Published: 1/21/2026

Updated: 1/21/2026

Configuration: Enable thorough checks (optional)

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.1

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2025-6052

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:azul:zulu

Required KB Items: installed_sw/Java

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 1/20/2026

Vulnerability Publication Date: 6/10/2025

Reference Information

CVE: CVE-2025-43368, CVE-2025-47219, CVE-2025-6021, CVE-2025-6052, CVE-2025-7425, CVE-2026-21925, CVE-2026-21932, CVE-2026-21933, CVE-2026-21945, CVE-2026-21947