What is CVE-2017-5336?

CVE-2017-5336 is a critical-severity vulnerability in GNU Gnutls, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2017-03-24.

How severe is CVE-2017-5336?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2017-5336 known to be exploited?

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

Buffer overflow in GNU Gnutls

CVE-2017-5336

Stack-based buffer overflow in the cdk_pk_get_keyid function in lib/opencdk/pubkey.c in GnuTLS before 3.3.26 and 3.5.x before 3.5.8 allows remote attackers to have unspecified impact via a crafted OpenPGP certificate.

Vulnerability class: Buffer Overflow

Published 2017-03-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.071 (94.0th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 94.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.071 · newest: 0.071 · change: 0.000

Affected products

GNU Gnutls — versions 3.5.0, 3.5.1, 3.5.2
openSUSE Leap — versions 42.1, 42.2

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

Public proof-of-concept exploits

ARPSyndicate/cvemon

References

gitlab.com/gnutls/gnutls/commit/5140422e0d7319a8e2fe07f02cbcafc4d6538732 (Patch, Third Party Advisory, Issue Tracking)
www.securityfocus.com/bid/95377 (VDB Entry, Third Party Advisory, vdb-entry)
www.openwall.com/lists/oss-security/2017/01/10/7 (mailing-list, Patch, Mailing List, Third Party Advisory)
access.redhat.com/errata/RHSA-2017:2292 (vendor-advisory)
www.securitytracker.com/id/1037576 (VDB Entry, Third Party Advisory, vdb-entry)
www.openwall.com/lists/oss-security/2017/01/11/4 (mailing-list, Patch, Mailing List, Third Party Advisory)
lists.opensuse.org/opensuse-security-announce/2017-02/msg00005.html (vendor-advisory, Third Party Advisory)
bugs.chromium.org/p/oss-fuzz/issues/detail (Patch, Third Party Advisory, Issue Tracking)
rhn.redhat.com/errata/RHSA-2017-0574.html (vendor-advisory)
security.gentoo.org/glsa/201702-04 (vendor-advisory, Patch, Third Party Advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2017-5336?: CVE-2017-5336 is a critical-severity vulnerability in GNU Gnutls, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2017-03-24.
How severe is CVE-2017-5336?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2017-5336 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.