CVE-2020-24979

bison: Buffer overflow in src/symtab.c via crafted input file redefining the EOF token can lead to DoS

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · September 4, 2020

Updated · June 27, 2026

Description

[REJECTED CVE] A Buffer Overflow vulnerability was found in GNU bison in src/symtab.c. A local attacker may execute bison with crafted input file redefining the EOF token, which could triggers Heap buffer overflow and thus cause system crash.

Statement

Please note that this CVE has been rejected Upstream.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

This flaw can be mitigated by not supplying untrusted input to be processed by GNU Bison.

CVSS / CWE

CVSS 3.1 · 5.5
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CWE-787 · Out-of-bounds Write