CVE-2026-24881

HIGH

8.1

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.

CVE Details

CVSS v3.1 Score8.1

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityHIGH

Privileges RequiredNONE

User InteractionNONE

Published1/27/2026

Last Modified2/12/2026

Sourcenvd

Honeypot Sightings0

Affected Products

gnupg:gnupggpg4win:gpg4win

Weaknesses (CWE)

CWE-121

References

https://dev.gnupg.org/T8044(cve@mitre.org)

https://www.openwall.com/lists/oss-security/2026/01/27/8(cve@mitre.org)

IOC Correlations

No correlations recorded

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