What is CVE-2019-11683?

CVE-2019-11683 is a critical-severity vulnerability in Linux Kernel, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2019-05-02.

How severe is CVE-2019-11683?

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

Buffer overflow in Linux Kernel

CVE-2019-11683

udp_gro_receive_segment in net/ipv4/udp_offload.c in the Linux kernel 5.x before 5.0.13 allows remote attackers to cause a denial of service (slab-out-of-bounds memory corruption) or possibly have unspecified other impact via UDP packets with a 0 payload, because of mishandling of padded packets, aka the "GRO packet of death" issue.

Vulnerability class: Buffer Overflow

Published 2019-05-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.075 (94.5th percentile), scored 2026-10-25.

Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 94.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.075 · newest: 0.075 · change: 0.000

Affected products

Linux Kernel
Canonical Ubuntu Linux — versions 19.04

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

www.spinics.net/lists/netdev/msg568315.html (Patch, Third Party Advisory, Issue Tracking)
git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/ (Patch, Issue Tracking, Vendor Advisory)
www.openwall.com/lists/oss-security/2019/05/02/1 (mailing-list, Mailing List, Third Party Advisory)
www.securityfocus.com/bid/108142 (VDB Entry, Third Party Advisory, vdb-entry)
www.openwall.com/lists/oss-security/2019/05/05/4 (mailing-list, Mailing List, Third Party Advisory)
cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.13 (Vendor Advisory)
lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
usn.ubuntu.com/3979-1/ (vendor-advisory, Third Party Advisory)
security.netapp.com/advisory/ntap-20190517-0002/ (Third Party Advisory)
support.f5.com/csp/article/K69550896 (Third Party Advisory)

Frequently asked questions

What is CVE-2019-11683?: CVE-2019-11683 is a critical-severity vulnerability in Linux Kernel, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2019-05-02.
How severe is CVE-2019-11683?: Critical severity. CVSS v3 base score is 9.8 out of 10.