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Ubuntu 26.04 LTS : CRaC JDK 21 vulnerabilities (USN-8694-1)

high Nessus Plugin ID 365403

Synopsis

The remote Ubuntu host is missing one or more security updates.

Description

The remote Ubuntu 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8694-1 advisory.

 It was discovered that the JSSE component of CRaC JDK 21 did not correctly authenticate users. A remote attacker could possibly use this issue to read or modify sensitive data. (CVE-2026-46968)

 It was discovered that the JSSE component of CRaC JDK 21 did not correctly authorize users. A remote attacker could possibly use this issue to cause a denial of service. (CVE-2026-46917)

 It was discovered that the ImageIO component of CRaC JDK 21 did not correctly authorize users. A remote attacker could possibly use this issue to read or modify sensitive data. (CVE-2026-47010)

 It was discovered that the 2D component of CRaC JDK 21 did not correctly authorize users. A remote attacker could possibly use this issue to cause a denial of service. (CVE-2026-47021, CVE-2026-47059)

 It was discovered that the Libraries component of CRaC JDK 21 did not correctly authorize users. A remote attacker could possibly use this issue to cause a denial of service. (CVE-2026-47027)

 It was discovered that the Security component of CRaC JDK 21 did not correctly authenticate users. A remote attacker could possibly use this issue to read or modify sensitive data. (CVE-2026-60147)

 It was discovered that the Libraries component of CRaC JDK 21 did not correctly authenticate users. A remote attacker could possibly use this issue to read or modify sensitive data. (CVE-2026-47063)

 It was discovered that the 2D (Little CMS) component of CRaC JDK 21 did not correctly handle certain integer arithmetic. An attacker could possibly use this issue to cause a denial of service.
 (CVE-2026-41254)

 In addition to security fixes, the updated packages contain bug fixes, new features, and possibly incompatible changes.

 Please see the following for more information:
 https://openjdk.org/groups/vulnerability/advisories/2026-07-21

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

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

Solution

Update the affected packages.

See Also

https://ubuntu.com/security/notices/USN-8694-1

Plugin Details

Severity: High

ID: 365403

File Name: ubuntu_USN-8694-1.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 10/13/2026

Updated: 10/13/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.75

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2026-47063

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:26.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:openjdk-21-crac-demo, p-cpe:/a:canonical:ubuntu_linux:openjdk-21-crac-jdk-headless, p-cpe:/a:canonical:ubuntu_linux:openjdk-21-crac-jdk, p-cpe:/a:canonical:ubuntu_linux:openjdk-21-crac-jre-headless, p-cpe:/a:canonical:ubuntu_linux:openjdk-21-crac-jre-zero, p-cpe:/a:canonical:ubuntu_linux:openjdk-21-crac-jre, p-cpe:/a:canonical:ubuntu_linux:openjdk-21-crac-source, p-cpe:/a:canonical:ubuntu_linux:openjdk-21-crac-testsupport

Required KB Items: Host/cpu, Host/Debian/dpkg-l, Host/Ubuntu, Host/Ubuntu/release

Exploit Ease: No known exploits are available

Patch Publication Date: 8/31/2026

Vulnerability Publication Date: 7/21/2026

Reference Information

CVE: CVE-2026-46917, CVE-2026-46968, CVE-2026-47010, CVE-2026-47021, CVE-2026-47027, CVE-2026-47059, CVE-2026-47063, CVE-2026-60147

USN: 8694-1