CVE-2021-3345: _gcry_md_block_write in cipher/hash-common.c in Libgcrypt version 1.9.0 has a heap-based buffer overflow when the digest final function sets a large count value. It is recommended to upgrade to 1.9.1 or later.
Overview
- Severity
- High (CVSS 7.8)
- CVSS Vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Exploit Status
- Not Exploited
- Patch Tuesday
- 2026-Aug
- Released
- 2026-08-07
- EPSS Score
- 1.06% (percentile: 61.5%)
Detection & Weaponization (1 sources)
Maturity: Exploit
- GitHub PoC: 2 repositories
Affected Products (1)
Open Source Software
- azl3 grub2 2.06-23 on Azure Linux 3.0
Revision History
- 2026-08-07: Information published.