CVE-2026-24883

Severity CVSS v4.0:

Pending analysis

Type:

CWE-476 NULL Pointer Dereference

Publication date:

27/01/2026

Last modified:

06/02/2026

Description

In GnuPG before 2.5.17, a long signature packet length causes parse_signature to return success with sig->data[] set to a NULL value, leading to a denial of service (application crash).

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS v3.1 Severity and Metrics:

Base Score: 3.70 LOW
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): Low

Base Score 3.x

3.70

Severity 3.x

LOW

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:gnupg:gnupg:::::-:::*	2.5.13 (including)	2.5.17 (excluding)
cpe:2.3:a:gpg4win:gpg4win::::::::	5.0.0 (including)	5.0.1 (excluding)

To consult the complete list of CPE names with products and versions, see this page

CVE-2026-24883

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools