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CVE-2026-24881

CVE-2026-24881

CVSS 8.1 HIGHEPSS 2.0%CWE-121
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:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
GnuPG · GnuPG

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References
https://dev.gnupg.org/T8044https://www.openwall.com/lists/oss-security/2026/01/27/8