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Linux Distros Unpatched Vulnerability : CVE-2026-40250

high Nessus Plugin ID 309647

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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.

 - OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. In versions 3.4.0 through 3.4.9, 3.3.0 through 3.3.9, and 3.2.0 through 3.2.7, `internal_dwa_compressor.h:1040` performs `chan->width * chan->bytes_per_element` in `int32` arithmetic without a `(size_t)` cast. This is the same overflow pattern fixed in other decoders by CVE-2026-34589/34588/34544, but this line was missed. Versions 3.4.10, 3.3.10, and 3.2.8 contain a fix that addresses `internal_dwa_compressor.h:1040`. (CVE-2026-40250)

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

Solution

There is no known solution at this time.

See Also

https://access.redhat.com/security/cve/cve-2026-40250

https://security-tracker.debian.org/tracker/CVE-2026-40250

Plugin Details

Severity: High

ID: 309647

File Name: unpatched_CVE_2026_40250.nasl

Version: 1.3

Type: Local

Agent: unix

Family: Misc.

Published: 4/22/2026

Updated: 4/23/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: Medium

Base Score: 6.6

Temporal Score: 5.6

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

CVSS Score Source: CVE-2026-40250

CVSS v3

Risk Factor: High

Base Score: 7.1

Temporal Score: 6.5

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

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

CVSS v4

Risk Factor: High

Base Score: 8.4

Threat Score: 5.7

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

CPE: cpe:/o:centos:centos:7, cpe:/o:debian:debian_linux:11.0, cpe:/o:redhat:enterprise_linux:7, cpe:/o:redhat:enterprise_linux:9, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:6, p-cpe:/a:centos:centos:openexr, p-cpe:/a:redhat:enterprise_linux:openexr-devel, p-cpe:/a:debian:debian_linux:openexr, cpe:/o:centos:centos:8, cpe:/o:debian:debian_linux:14.0, p-cpe:/a:centos:centos:openexr-libs, p-cpe:/a:centos:centos:openexr-devel, p-cpe:/a:redhat:enterprise_linux:openexr-libs, cpe:/o:debian:debian_linux:12.0, cpe:/o:redhat:enterprise_linux:10, cpe:/o:debian:debian_linux:13.0, p-cpe:/a:redhat:enterprise_linux:openexr

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

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 4/19/2026

Reference Information

CVE: CVE-2026-40250