What is CVE-2016-4429?

CVE-2016-4429 is a medium-severity vulnerability in GNU Glibc, classified under Out-of-bounds Write. CVSS score: 5.9/10. Published 2016-06-10.

How severe is CVE-2016-4429?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Is CVE-2016-4429 known to be exploited?

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

Buffer overflow in GNU Glibc

CVE-2016-4429

Stack-based buffer overflow in the clntudp_call function in sunrpc/clnt_udp.c in the GNU C Library (aka glibc or libc6) allows remote servers to cause a denial of service (crash) or possibly unspecified other impact via a flood of crafted ICMP and UDP packets.

Vulnerability class: Buffer Overflow

Published 2016-06-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.045 (91.3th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 91.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.039 · newest: 0.045 · change: +0.006

Affected products

GNU Glibc
Canonical Ubuntu Linux — versions 12.04, 14.04, 16.04
openSUSE Leap — versions 42.1
openSUSE — versions 13.2

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

ARPSyndicate/cvemon

References

usn.ubuntu.com/3759-2/ (vendor-advisory, Third Party Advisory)
lists.opensuse.org/opensuse-updates/2016-07/msg00039.html (vendor-advisory, Mailing List, Third Party Advisory)
usn.ubuntu.com/3759-1/ (vendor-advisory, Third Party Advisory)
lists.opensuse.org/opensuse-updates/2016-06/msg00030.html (vendor-advisory, Mailing List, Third Party Advisory)
www.securityfocus.com/bid/102073 (VDB Entry, Third Party Advisory, vdb-entry)
lists.debian.org/debian-lts-announce/2020/06/msg00027.html (mailing-list)
www-01.ibm.com/support/docview.wss (Broken Link)
www.oracle.com//security-alerts/cpujul2021.html
sourceware.org/bugzilla/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
source.android.com/security/bulletin/2017-12-01 (Third Party Advisory)

Frequently asked questions

What is CVE-2016-4429?: CVE-2016-4429 is a medium-severity vulnerability in GNU Glibc, classified under Out-of-bounds Write. CVSS score: 5.9/10. Published 2016-06-10.
How severe is CVE-2016-4429?: Medium severity. CVSS v3 base score is 5.9 out of 10.
Is CVE-2016-4429 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.