CVE-2021-33641

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CVSS 3.1

7.8 high

EPSS

<1%p19

Published

Jan 20, 2023 (Jan 20, 2023)

Modified

Jun 17, 2026

Description

When processing files, malloc stores the data of the current line. When processing comments, malloc incorrectly accesses the released memory (use after free).

Vendors: openeuler
Products: byacc
Weakness: CWE-416
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (0.3%)

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