HIGH 7.8 Microsoft
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.
Microsoft Security Update 2026-Aug: _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.
Affected Products
- azl3 grub2 2.06-23 on Azure Linux 3.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-3345
- https://nvd.nist.gov/vuln/detail/CVE-2021-3345
This high severity vulnerability with a CVSS score of 7.8 was published on 2026-08-06 via Microsoft. Affected: azl3 grub2 2.06-23 on Azure Linux 3.0.
vulnfeed aggregates 8893 vulnerabilities from NVD, CISA KEV,
Ubuntu, Debian, Red Hat, Kubernetes, Exploit-DB, OSS-Security, GitHub and OpenStack — updated every 4 hours.