CVE-2026-24881
CVSS Score
8.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-121 |
| Vendor | gnupg |
| Product | gnupg |
| Published | Jan 27, 2026 |
| Last Updated | Jun 30, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
GnuPG / GnuPG
2.5.13 < 2.5.17
References
openwall.com: https://www.openwall.com/lists/oss-security/2026/01/27/8 dev.gnupg.org: https://dev.gnupg.org/T8044 access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-24881 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2433480 security.access.redhat.com: https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-24881.json