CVE-2026-41989
Libgcrypt: Libgcrypt: Denial of Service and buffer overflow via crafted ECDH ciphertext
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · April 23, 2026
Updated · October 15, 2026
Description
A flaw was found in Libgcrypt. A remote attacker could exploit this vulnerability by sending crafted Elliptic Curve Diffie-Hellman (ECDH) ciphertext to the gcry_pk_decrypt function. This can lead to a heap-based buffer overflow, potentially causing a denial of service (DoS) condition.
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
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
CVSS / CWE
CVSS 3.1 · 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-131 · Incorrect Calculation of Buffer Size