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Fencer Intel
medium 5.9

CVE-2019-3836 json

It was discovered in gnutls before version 3.6.7 upstream that there is an uninitialized pointer access in gnutls versions 3.6.3 or later w…

published 7y ago modified 4mo ago also EUVD-2019-13456

cvss
5.9
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
3.4%
EPSS 3.4% chance of exploitation in 30 days, percentile 89%
public exploits
0
none known

Summary

It was discovered in gnutls before version 3.6.7 upstream that there is an uninitialized pointer access in gnutls versions 3.6.3 or later which can be triggered by certain post-handshake messages.

Patch / fix

  • gnu gnutls 3.6.7
  • gnutls28 Debian 14, Debian 13, Debian 12 3.6.7-2

debian advisories DEBIAN-CVE-2019-3836

  • gnutls RHEL 8 3.6.8-8.el8
  • gnutls-c++ RHEL 8 3.6.8-8.el8
  • gnutls-dane RHEL 8 3.6.8-8.el8
  • gnutls-utils RHEL 8 3.6.8-8.el8

red hat advisories RHSA-2019:3600

  • gnutls SLE Module for Desktop Applications 15, SLE Module for Basesystem 15 3.6.7-6.8.1

suse advisories SUSE-SU-2019:1121-1

  • gnutls openSUSE Tumbleweed 3.7.2-1.2
  • gnutls openSUSE Leap 15.0 3.6.7-lp150.9.1

opensuse advisories openSUSE-SU-2024:10801-1openSUSE-SU-2019:1353-1

  • gnutls Alpine 3.24, Alpine 3.23, Alpine 3.22 +14 more 3.6.7-r0

alpine advisories ALPINE-CVE-2019-3836

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • gnutls Arch Linux 3.6.7-1

arch linux advisories AVG-945

Is CVE-2019-3836 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-3836 updated cvss 5.9

gnutls: invalid pointer access upon receiving async handshake messages

  • Red Hat Enterprise Linux AppStream (v. 8) gnutls-c++ 3.6.8-8.el8, gnutls-dane 3.6.8-8.el8, gnutls-utils 3.6.8-8.el8 Red Hat Enterprise Linux BaseOS (v. 8) gnutls 3.6.8-8.el8
    fixed: vendor fix RHSA-2019:3600
  • Red Hat Enterprise Linux 5 gnutls Red Hat Enterprise Linux 6 gnutls, gnutls-guile, gnutls-utils Red Hat Enterprise Linux 7 gnutls, gnutls-c++, gnutls-dane, gnutls-utils
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

3.43% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • gitlab.com https://gitlab.com/gnutls/gnutls/issues/704 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.0 5.9 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

  • gnutls gnutls

Classification

Weakness
  • CWE-456 Missing Initialization of a Variable
  • CWE-824 Access of Uninitialized Pointer

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.