What is CVE-2015-1607?

CVE-2015-1607 is a medium-severity vulnerability in Gnupg, classified under Improper Input Validation. CVSS score: 5.5/10. Published 2019-11-20.

How severe is CVE-2015-1607?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Is CVE-2015-1607 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Improper input validation in Gnupg

CVE-2015-1607

kbx/keybox-search.c in GnuPG before 1.4.19, 2.0.x before 2.0.27, and 2.1.x before 2.1.2 does not properly handle bitwise left-shifts, which allows remote attackers to cause a denial of service (invalid read operation) via a crafted keyring file, related to sign extensions and "memcpy with overlapping ranges."

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2019-11-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.025 (83.9th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 83.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.025 · newest: 0.025 · change: 0.000

Affected products

Gnupg
Canonical Ubuntu Linux — versions 10.04, 12.04, 14.04

Weakness classification (CWE)

CWE-20 — Improper Input Validation

Public proof-of-concept exploits

References

blog.fuzzing-project.org/5-Multiple-issues-in-GnuPG-found-through-keyring-fuzzi… (Third Party Advisory)
lists.gnupg.org/pipermail/gnupg-announce/2015q1/000363.html (Mailing List, Release Notes, Vendor Advisory)
www.openwall.com/lists/oss-security/2015/02/13/14 (Mailing List, Third Party Advisory)
www.openwall.com/lists/oss-security/2015/02/14/6 (Mailing List, Third Party Advisory)
lists.gnupg.org/pipermail/gnupg-announce/2015q1/000361.html (Mailing List, Release Notes, Vendor Advisory)
lists.gnupg.org/pipermail/gnupg-announce/2015q1/000362.html (Mailing List, Release Notes, Vendor Advisory)
git.gnupg.org/cgi-bin/gitweb.cgi
www.ubuntu.com/usn/usn-2554-1/ (Third Party Advisory)
www.securityfocus.com/bid/72610 (VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2015-1607?: CVE-2015-1607 is a medium-severity vulnerability in Gnupg, classified under Improper Input Validation. CVSS score: 5.5/10. Published 2019-11-20.
How severe is CVE-2015-1607?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2015-1607 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.