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Fedora 44 : perl-YAML-Syck (2026-2139aa7dce)

critical Nessus Plugin ID 329164

Synopsis

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

Description

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-2139aa7dce advisory.

 This update addresses four `libsyck` memory-safety CVEs reachable from the default `YAML::Syck::Load()` path on untrusted input with no special flags:

 * CVE-2026-57075 (CWE-125): Out-of-bounds read in the base64 decoder caused by signed-char indexing of the decode table on !!binary input
 * CVE-2026-57076 (CWE-416): Use-after-free of an anchor key string shared between the node and the anchors table
 * CVE-2026-57077 (CWE-125): One-byte out-of-bounds read in the lexer newline scan during block-scalar parsing (incomplete-fix follow-on to CVE-2025-11683)
 * CVE-2026-13713 (CWE-416/CWE-415): Use-after-free / double-free of an anchor node on anchor redefinition, a remote-crash DoS from a 7-byte input

 There are also a few other bug-fixes included.


Tenable has extracted the preceding description block directly from the Fedora 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 perl-YAML-Syck package.

See Also

https://bodhi.fedoraproject.org/updates/FEDORA-2026-2139aa7dce

Plugin Details

Severity: Critical

ID: 329164

File Name: fedora_2026-2139aa7dce.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 7/23/2026

Updated: 7/23/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.9

Percentile: 96.89

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7

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

CVSS Score Source: CVE-2026-57075

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 7.9

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

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

Vulnerability Information

CPE: cpe:/o:fedoraproject:fedora:44, p-cpe:/a:fedoraproject:fedora:perl-yaml-syck

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 7/14/2026

Vulnerability Publication Date: 10/16/2025

Reference Information

CVE: CVE-2025-11683, CVE-2026-13713, CVE-2026-57075, CVE-2026-57076, CVE-2026-57077