CVE-2026-24881

Published: Jan 27, 2026Modified: Jul 15, 2026

9.8

Vector

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

Exploitability: 3.9 / Impact: 5.9

Source: NVD

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.

Affected (2)

Products: Gnupg: Gnupg · Gpg4win: Gpg4win

1 product

1 product

Configuration A

2 vulnerable

Vulnerable Software	Affected Versions
Gnupg Gnupg	From 2.5.13 to 2.5.17
Gpg4win Gpg4win	From 5.0.0 to 5.0.1

Related CWEs

Stack-based Buffer Overflow

A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).

References (5)

https://dev.gnupg.org/T8044

Source: cve@mitre.org

ExploitProduct

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

Source: cve@mitre.org

Mailing ListThird Party Advisory

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

Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

https://bugzilla.redhat.com/show_bug.cgi?id=2433480

Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-24881.json

Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

Timeline

No history available yet.