CVE-2019-3836· NVD / CVE Program· CNA redhat

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 wh

Noroxi assessment

Priority: Monitor (action score 31/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 3.4% (FIRST EPSS); higher than 88.5% of all records.
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
Fixed version: gnutls (Alpine:v3.10) 3.6.7-r0; gnutls28 (Debian:12) 3.6.7-2; gnutls (openSUSE:Leap 15.0) 3.6.7-lp150.9.1.

Low priority for now. Upgrade to gnutls (Alpine:v3.10) 3.6.7-r0; gnutls28 (Debian:12) 3.6.7-2; gnutls (openSUSE:Leap 15.0) 3.6.7-lp150.9.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

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.

HighCVSS 7.5 · v3.0—No exploit Fix available

Published: Apr 1, 2019
Updated: Jun 16, 2026
EPSS: 3.4% · 89th percentile
CWE: CWE-456

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 30 / 40 · 7.5 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 1 / 30 · 3.4%

CNA vs NVD score

NVD: 7.5
CNA · redhat: 5.9; 1.6 point gap

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
gnu	gnutls	cpe:2.3:a:gnu:gnutls
fedoraproject	fedora	cpe:2.3:o:fedoraproject:fedora
opensuse	leap	cpe:2.3:o:opensuse:leap

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

fedoraproject fedora28
gnu gnutls3.6.3 and later · before 3.6.7
opensuse leap15.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

gnutls gnutls
- fixed in gnutls 3.6.7affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Alpine:v3.10	gnutls	from 3.6.3 · before 3.6.7-r0	3.6.7-r0
Debian:12	gnutls28	before 3.6.7-2	3.6.7-2
openSUSE:Leap 15.0	gnutls	before 3.6.7-lp150.9.1	3.6.7-lp150.9.1
openSUSE:Tumbleweed	gnutls	before 3.7.2-1.2	3.7.2-1.2
Red Hat:enterprise_linux:8::appstream	gnutls-c++	before 0:3.6.8-8.el8	0:3.6.8-8.el8
Red Hat:enterprise_linux:8::appstream	gnutls-c++-debuginfo	before 0:3.6.8-8.el8	0:3.6.8-8.el8
Red Hat:enterprise_linux:8::appstream	gnutls-dane	before 0:3.6.8-8.el8	0:3.6.8-8.el8
Red Hat:enterprise_linux:8::appstream	gnutls-dane-debuginfo	before 0:3.6.8-8.el8	0:3.6.8-8.el8
Red Hat:enterprise_linux:8::appstream	gnutls-debuginfo	before 0:3.6.8-8.el8	0:3.6.8-8.el8
Red Hat:enterprise_linux:8::appstream	gnutls-debugsource	before 0:3.6.8-8.el8	0:3.6.8-8.el8
Red Hat:enterprise_linux:8::appstream	gnutls-devel	before 0:3.6.8-8.el8	0:3.6.8-8.el8
Red Hat:enterprise_linux:8::appstream	gnutls-utils	before 0:3.6.8-8.el8	0:3.6.8-8.el8
Red Hat:enterprise_linux:8::appstream	gnutls-utils-debuginfo	before 0:3.6.8-8.el8	0:3.6.8-8.el8
Red Hat:enterprise_linux:8::baseos	gnutls	before 0:3.6.8-8.el8	0:3.6.8-8.el8
SUSE:Linux Enterprise Module for Basesystem 15	gnutls	before 3.6.7-6.8.1	3.6.7-6.8.1

Same product

gnu: all records

Other highest-scoring records for the same primary product.

CVE-2017-5334Double free vulnerability in the gnutls_x509_ext_import_proxy function in GnuTLS before 3.3.26 and 3.5.x before 3.5.8 allows remote attacker
49Plan
CVE-2019-3829A vulnerability was found in gnutls versions from 3.5.8 before 3.6.7.
48Plan
CVE-2008-1948The _gnutls_server_name_recv_params function in lib/ext_server_name.c in libgnutls in gnutls-serv in GnuTLS before 2.2.4 does not properly c
44Plan
CVE-2017-5337Multiple heap-based buffer overflows in the read_attribute function in GnuTLS before 3.3.26 and 3.5.x before 3.5.8 allow remote attackers to
41Plan
CVE-2017-5336Stack-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 r
41Plan
CVE-2021-20232A flaw was found in gnutls.
40Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
alpine:gnutls	3.6.7-r0 · Alpine:v3.10	Package registry (OSV)
debian:gnutls28	3.6.7-2 · Debian:12	Package registry (OSV)
opensuse:gnutls	3.6.7-lp150.9.1 · openSUSE:Leap 15.0	Package registry (OSV)
red hat:gnutls	0:3.6.8-8.el8 · Red Hat:enterprise_linux:8::baseos	Package registry (OSV)
red hat:gnutls-c++	0:3.6.8-8.el8 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:gnutls-c++-debuginfo	0:3.6.8-8.el8 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:gnutls-dane	0:3.6.8-8.el8 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:gnutls-dane-debuginfo	0:3.6.8-8.el8 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:gnutls-debuginfo	0:3.6.8-8.el8 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:gnutls-debugsource	0:3.6.8-8.el8 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:gnutls-devel	0:3.6.8-8.el8 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:gnutls-utils	0:3.6.8-8.el8 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:gnutls-utils-debuginfo	0:3.6.8-8.el8 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
suse:gnutls	3.6.7-6.8.1 · SUSE:Linux Enterprise Module for Basesystem 15	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: none
Integrity: none
Availability: high · the service can be disrupted

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: None
Integrity impact: None
Availability impact: High

Weakness class (CWE)

CWE-456 · Missing Initialization of a Variable

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

Fix✗ → ✓Sep 28, 2026, 10:47 PM UTC

For records you follow, these changes also arrive as notifications. →

References

lists.opensuse.org/opensuse-security-announce/2019-05/msg00017.html

Show all references (6 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records