Bug 2387286 (CVE-2025-8733)

Summary: CVE-2025-8733 bison: Bison Assertion Reachability Vulnerability
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerability-draftAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: unspecifiedKeywords: Security
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in bison. The `__obstack_vprintf_internal` function in `obprintf.c` contains an issue where manipulation can lead to a reachable assertion, potentially allowing a local attacker to trigger an assertion failure. This condition is exploitable via crafted input. The primary consequence of this vulnerability is a denial of service.
Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2387627, 2387628    
Bug Blocks:    

Description OSIDB Bzimport 2025-08-08 18:01:49 UTC
A vulnerability was found in GNU Bison up to 3.8.2. It has been rated as problematic. This issue affects the function __obstack_vprintf_internal of the file obprintf.c. The manipulation leads to reachable assertion. It is possible to launch the attack on the local host. The exploit has been disclosed to the public and may be used.