Detections
Analytics

RHEL 9 : protobuf (RHSA-2026:3095)

high Nessus Plugin ID 299786

Synopsis

The remote Red Hat host is missing a security update for protobuf.

Description

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:3095 advisory.

 The protobuf packages provide Protocol Buffers, Google's data interchange format. Protocol Buffers can encode structured data in an efficient yet extensible format, and provide a flexible, efficient, and automated mechanism for serializing structured data.

 Security Fix(es):

 * python: protobuf: Protobuf: Denial of Service due to recursion depth bypass (CVE-2026-0994)

 For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the RHEL protobuf package based on the guidance in RHSA-2026:3095.

See Also

https://access.redhat.com/security/updates/classification/#important

https://bugzilla.redhat.com/show_bug.cgi?id=2432398

http://www.nessus.org/u?a164b419

https://access.redhat.com/errata/RHSA-2026:3095

Plugin Details

Severity: High

ID: 299786

File Name: redhat-RHSA-2026-3095.nasl

Version: 1.1

Type: local

Agent: unix

Published: 2/23/2026

Updated: 2/23/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2026-0994

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

CVSS v4

Risk Factor: High

Base Score: 8.2

Threat Score: 4.6

Threat Vector: CVSS:4.0/E:U

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

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:protobuf-devel, p-cpe:/a:redhat:enterprise_linux:protobuf-lite, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:redhat:enterprise_linux:protobuf-lite-devel, p-cpe:/a:redhat:enterprise_linux:protobuf, p-cpe:/a:redhat:enterprise_linux:python3-protobuf, p-cpe:/a:redhat:enterprise_linux:protobuf-compiler

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

Exploit Ease: No known exploits are available

Patch Publication Date: 2/23/2026

Vulnerability Publication Date: 1/23/2026

Reference Information

CVE: CVE-2026-0994

CWE: 674

RHSA: 2026:3095