CVE Database›Document archive›CVE-2026-41989

CVE-2026-41989

Libgcrypt: Libgcrypt: Denial of Service and buffer overflow via crafted ECDH ciphertext

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Severity

Moderate

Red Hat Product Security

7.5

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 · 7.5
CVSS: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