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AlmaLinux 9.2 [TuxCare] Security Update: osbuild-composer / osbuild-composer-core / etc Multiple Vulnerabilities (ALMALINUX9.2:CLSA-2026:1789780319)

medium Nessus Plugin ID 362101

Synopsis

The AlmaLinux host is missing one or more security updates.

Description

The AlmaLinux 9.2 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare ALMALINUX9.2:CLSA-2026:1789780319 advisory.

 - During chain building, the amount of work that is done is not correctly limited when a large number of intermediate certificates are passed in VerifyOptions.Intermediates, which can lead to a denial of service. This affects both direct users of crypto/x509 and users of crypto/tls. (CVE-2026-32280)

 - Enforce a recursion limit in Unmarshal to prevent stack exhaustion when parsing deeply-nested, recursive structures. (CVE-2026-33818)

 - Decoding a maliciously-crafted MIME header containing many invalid encoded-words can consume excessive CPU. (CVE-2026-42504)

 - Previously, pathological inputs could close an unescaped '/' early, allowing for attack-controlled data to inject arbitrary content, potentially leading to XSS. (CVE-2026-56858)

 - Previously, DecodeElement would reset the depth counter causing it to never fire; this could lead to stack exhaustion. (CVE-2026-56859)

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 based on the guidance in TuxCare advisory ALMALINUX9.2:CLSA-2026:1789780319.

See Also

https://cve.tuxcare.com/els/releases/CLSA-2026:1789780319

http://www.nessus.org/u?03e2cafb

Plugin Details

Severity: Medium

ID: 362101

File Name: tuxcare_alma_linux_9.2_CLSA-2026-1789780319.nasl

Version: 1.1

Type: Local

Published: 10/1/2026

Updated: 10/1/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 93.28

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7

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

CVSS Score Source: CVE-2026-56858

CVSS v3

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 5.3

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

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

Vulnerability Information

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/AlmaLinux/release, Host/AlmaLinux/rpm-list, Host/OS/extended-third-party

Exploit Ease: No known exploits are available

Patch Publication Date: 9/19/2026

Vulnerability Publication Date: 4/7/2026

Reference Information

CVE: CVE-2026-32280, CVE-2026-33818, CVE-2026-42504, CVE-2026-56858, CVE-2026-56859, CVE-2026-56860, CVE-2026-56862

CLSA: 2026:1789780319