Reachable Assertion Affecting rhcos package, versions *


Severity

Recommended
0.0
low
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.02% (3rd percentile)

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  • Snyk IDSNYK-RHEL8-RHCOS-11784988
  • published2 Sept 2025
  • disclosed8 Aug 2025

Introduced: 8 Aug 2025

CVE-2025-8733  (opens in a new tab)
CWE-617  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:8 rhcos.

NVD Description

Note: Versions mentioned in the description apply only to the upstream rhcos package and not the rhcos package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

A flaw has been found in GNU Bison up to 3.8.2. This affects the function __obstack_vprintf_internal of the file obprintf.c. Executing manipulation can lead to reachable assertion. The attack requires local access. The exploit has been published and may be used. It is still unclear if this vulnerability genuinely exists. The issue could not be reproduced from a GNU Bison 3.8.2 tarball run in a Fedora 42 container.

CVSS Base Scores

version 3.1