CVE-2026-24881

CRITICAL EPSS 78.0%
Published Jan 27, 20265mo ago · Modified Jun 17, 20261w ago
9.8 CVSS 3.1
Critical
Find Similar
Published Jan 27, 2026 5mo ago
Last Modified Jun 17, 2026 1w ago

Description

In GnuPG before 2.5.17, a crafted CMS (S/MIME) EnvelopedData message carrying an oversized wrapped session key can cause a stack-based buffer overflow in gpg-agent during PKDECRYPT--kem=CMS handling. This can easily be leveraged for denial of service; however, there is also memory corruption that could lead to remote code execution.

CVSS Details

Base Score
9.8
Exploitability
3.9
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
78.0% percentile
Exploit & Patch Status
Public Exploit Known
No Patch Available

Weaknesses 1

CWE-121

Affected Products 2

VendorProductVersionRange
gnupggnupg*≥2.5.13  –  <2.5.17
gpg4wingpg4win*≥5.0.0  –  <5.0.1

References 2

  • dev.gnupg.org https://dev.gnupg.org/T8044
    ExploitProduct
  • openwall.com https://www.openwall.com/lists/oss-security/2026/01/27/8
    Mailing ListThird Party Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.