CVE-2026-24881CRITICAL 8.1EPSS p74.2%

CVE-2026-24881CVE-2026-24881

gnupg / gnupg

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.

Scoring

CVSS 3.18.1 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS1.65% probability of exploitation · percentile 74.2% · 2026-08-03T12:00:16Z
Published2026-01-27
Last modified2026-07-15

Underlying weaknesses· 1

CWE-121

References

  1. https://dev.gnupg.org/T8044
  2. https://www.openwall.com/lists/oss-security/2026/01/27/8

1

TypeTargetConfidenceTier
WeaknessStack-based Buffer Overflowcwe-1210%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.