gnupg Libgcrypt up to 1.10.3/1.11.2/1.12.1 ECDH gcry_pk_decrypt out-of-bounds write

CVSS Meta Temp Score
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CTI Interest Score
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5.9$0-$5k0.00

Summaryinfo

A vulnerability was found in gnupg Libgcrypt up to 1.10.3/1.11.2/1.12.1. It has been classified as critical. This affects the function gcry_pk_decrypt of the component ECDH Handler. This manipulation causes out-of-bounds write. The identification of this vulnerability is CVE-2026-41989. The attack can only be executed locally. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical was found in gnupg Libgcrypt up to 1.10.3/1.11.2/1.12.1. Affected by this vulnerability is the function gcry_pk_decrypt of the component ECDH Handler. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Libgcrypt before 1.12.2 sometimes allows a heap-based buffer overflow and denial of service via crafted ECDH ciphertext to gcry_pk_decrypt.

It is possible to read the advisory at lists.gnupg.org. This vulnerability is known as CVE-2026-41989 since 04/23/2026. The exploitation appears to be easy. Attacking locally is a requirement. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 316550 (Debian dsa-6294 : libgcrypt-bin - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.10.4, 1.11.3 or 1.12.2 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (316550), EUVD (EUVD-2026-25192) and CERT Bund (WID-SEC-2026-1267). Be aware that VulDB is the high quality source for vulnerability data.

Affected

  • Red Hat Enterprise Linux
  • Fedora Linux
  • SUSE Linux
  • Oracle Linux
  • RESF Rocky Linux
  • IBM MQ
  • Debian Linux

Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.0
VulDB Meta Temp Score: 5.9

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.7
CNA Vector (MITRE): 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 316550
Nessus Name: Debian dsa-6294 : libgcrypt-bin - security update

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Libgcrypt 1.10.4/1.11.3/1.12.2

Timelineinfo

04/23/2026 Advisory disclosed
04/23/2026 +0 days CVE reserved
04/23/2026 +0 days VulDB entry created
06/03/2026 +41 days VulDB entry last update

Sourcesinfo

Advisory: lists.gnupg.org
Status: Confirmed

CVE: CVE-2026-41989 (🔒)
GCVE (CVE): GCVE-0-2026-41989
GCVE (VulDB): GCVE-100-359119
EUVD: 🔒
CERT Bund: WID-SEC-2026-1267 - Red Hat Hardened Images RPMs: Mehrere Schwachstellen

Entryinfo

Created: 04/23/2026 07:21
Updated: 06/03/2026 08:56
Changes: 04/23/2026 07:21 (65), 04/23/2026 10:30 (1), 05/25/2026 20:22 (2), 06/03/2026 08:56 (7)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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