Linux Distros Unpatched Vulnerability : CVE-2026-15714

critical Nessus Plugin ID 326910

Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

- An out-of-bounds read vulnerability was found in libsoup's multipart processing subsystem. The flaw exists in the soup_multipart_input_stream_read_headers() function inside soup-multipart-input-stream.c, which does not adequately restrict or validate the size of incoming multipart boundary strings. When processing a crafted HTTP response containing a malformed or oversized boundary parameter, the internal stream reader reads past the allocated buffer bounds. A remote, unauthenticated attacker can exploit this behavior to cause a service denial (DoS) through application failure or potentially read fragments of unauthorized memory metadata. (CVE-2026-15714)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

Plugin Details

Severity: Critical

ID: 326910

File Name: unpatched_CVE_2026_15714.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Misc.

Published: 7/15/2026

Updated: 7/15/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 2.1

Percentile: 7.83

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 5.4

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

CVSS Score Source: CVE-2026-15714

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 8.3

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:U/RC:C

Vulnerability Information

CPE: cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:centos:centos:libsoup3-doc, p-cpe:/a:centos:centos:libsoup, p-cpe:/a:redhat:enterprise_linux:libsoup3, p-cpe:/a:centos:centos:libsoup3-devel, cpe:/o:centos:centos:8, p-cpe:/a:centos:centos:libsoup-devel, p-cpe:/a:redhat:enterprise_linux:libsoup, cpe:/o:redhat:enterprise_linux:10, p-cpe:/a:centos:centos:libsoup3, p-cpe:/a:redhat:enterprise_linux:libsoup-devel, p-cpe:/a:redhat:enterprise_linux:libsoup3-doc, p-cpe:/a:redhat:enterprise_linux:libsoup3-devel, cpe:/o:redhat:enterprise_linux:8

Required KB Items: Host/cpu, Host/local_checks_enabled, global_settings/vendor_unpatched, Host/OS/identifier

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 7/14/2026

Reference Information

CVE: CVE-2026-15714

Detections

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