Linux Distros Unpatched Vulnerability : CVE-2026-96639

critical Nessus Plugin ID 370547

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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.

- Pillow is a Python imaging library. From 11.0.0 until 13.0.0, multi-frame loaders can retain an ImagingCore allocation created for a narrow frame mode while a later frame of the same dimensions changes the logical mode and decoder tiles to wider RGB or CMYK data. ImageFile.load_prepare() reuses the stale native storage because _im is non-null without verifying that its mode and size still match. Crafted PSD, MPO, DCX, or MIC frame transitions can then write wider pixels into the narrow allocation, causing native out-of-bounds writes and crashes. The MPO path can also cause a native over-read and, in demonstrated runtime-specific profiles, command execution. This issue is fixed in version 13.0.0. (CVE-2026-96639)

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: 370547

File Name: unpatched_CVE_2026_96639.nasl

Version: 1.7

Type: Local

Agent: unix

Family: Misc.

Published: 10/22/2026

Updated: 11/4/2026

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: Medium

Score: 4.9

Percentile: 58.52

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 8.5

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

CVSS Score Source: CVE-2026-96639

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 9

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:14.04:-:lts, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, cpe:/o:canonical:ubuntu_linux:26.04:-:lts, cpe:/o:canonical:ubuntu_linux:26.10, cpe:/o:centos:centos:8, cpe:/o:debian:debian_linux:12.0, cpe:/o:debian:debian_linux:13.0, cpe:/o:debian:debian_linux:14.0, cpe:/o:redhat:enterprise_linux:8, p-cpe:/a:canonical:ubuntu_linux:pillow-python2, p-cpe:/a:canonical:ubuntu_linux:pillow, p-cpe:/a:centos:centos:python-pillow, p-cpe:/a:centos:centos:python3-pillow-devel, p-cpe:/a:centos:centos:python3-pillow-doc, p-cpe:/a:centos:centos:python3-pillow-tk, p-cpe:/a:centos:centos:python3-pillow, p-cpe:/a:debian:debian_linux:pillow, p-cpe:/a:redhat:enterprise_linux:python-pillow, p-cpe:/a:redhat:enterprise_linux:python3-pillow-devel, p-cpe:/a:redhat:enterprise_linux:python3-pillow-doc, p-cpe:/a:redhat:enterprise_linux:python3-pillow-tk, p-cpe:/a:redhat:enterprise_linux:python3-pillow

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: 10/21/2026

Reference Information

CVE: CVE-2026-96639

Detections

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