CVE-2026-24881

Published: Jan 27, 2026Updated: Jul 15, 2026 Sources: CVE List NVDCWE-121

8.1HIGH

NVD MITRE

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:HAttack Complexity

High

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:HConfidentiality

High

I:HIntegrity

High

A:HAvailability

High

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Weaknesses

CWE-121

Affected Products

GnuPG

oss-projectaka libgcrypt, libksba

GnuPGLibraryLibrary

Security Products / pki-crypto

gpg4win

commercial

gpg4winOn-prem

Security Products / pki-crypto

and 1 more affected products View all →

Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique

Privilege Escalation

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References

https://dev.gnupg.org/T8044

dev.gnupg.org

https://www.openwall.com/lists/oss-security/2026/01/27/8

openwall.com

https://access.redhat.com/security/cve/CVE-2026-24881

access.redhat.com

and 2 more references View all →

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