CVE-2026-24881

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 v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://dev.gnupg.org/T8044	Exploit Product
https://www.openwall.com/lists/oss-security/2026/01/27/8	Mailing List Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-24881
https://bugzilla.redhat.com/show_bug.cgi?id=2433480
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-24881.json

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:gnupg:gnupg:::::-:::*
	cpe:2.3:a:gpg4win:gpg4win::::::::

History

No history.

Information

Published : 2026-01-27 19:16

Updated : 2026-07-15 02:18

NVD link : CVE-2026-24881

Mitre link : CVE-2026-24881

CVE.ORG link : CVE-2026-24881

JSON object : View

Products Affected

gpg4win

gpg4win

gnupg

gnupg

CWE

CWE-121

Stack-based Buffer Overflow

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This can easily be leveraged for denial of service; however, there is also memory corruption that could lead to remote code execution."}, {"lang": "es", "value": "En GnuPG anterior a 2.5.17, un mensaje CMS (S/MIME) EnvelopedData manipulado que transporta una clave de sesi\u00f3n envuelta de tama\u00f1o excesivo puede causar un desbordamiento de b\u00fafer basado en pila en gpg-agent durante el manejo de PKDECRYPT--kem=CMS. Esto puede ser f\u00e1cilmente aprovechado para una denegaci\u00f3n de servicio; sin embargo, tambi\u00e9n hay corrupci\u00f3n de memoria que podr\u00eda conducir a la ejecuci\u00f3n remota de c\u00f3digo."}], "lastModified": "2026-07-15T02:18:52.100", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:gnupg:gnupg:*:*:*:*:-:*:*:*", "vulnerable": true, "matchCriteriaId": "B85633E2-C26B-4A9C-8277-84071984B915", "versionEndExcluding": "2.5.17", "versionStartIncluding": "2.5.13"}, {"criteria": "cpe:2.3:a:gpg4win:gpg4win:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "731095A1-2A2B-4441-B76D-CD78119D7E0E", "versionEndExcluding": "5.0.1", "versionStartIncluding": "5.0.0"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}