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CVE-2019-3836

It was discovered in gnutls before version 3.6.7 upstream that there is an uninitialized pointer...

5.9 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
High
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

3.43%Up 1.6 points since Apr 14, 2021
90%50%10%1%

What each source reports

CVE List Score used 5.9

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.

Record
CVE-2019-3836
CVSS 3.0
5.9 MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-456
Updated
2026-11-02
EUVDEUVD-2019-13456 5.9

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.

Record
EUVD-2019-13456
CVSS 3.0
5.9 MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-03
GitHub AdvisoriesGHSA-fqw6-7w7w-627p 7.5

It was discovered in gnutls before version 3.6.7 upstream that there is an uninitialized pointer...

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.

Record
GHSA-fqw6-7w7w-627p
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-824
Updated
2026-11-02
NVD 5.9

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.

Record
CVE-2019-3836
CVSS 3.0
5.9 MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness
CWE-456, CWE-824
Updated
2026-11-02
OSVALPINE-CVE-2019-3836 7.5

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.

Record
ALPINE-CVE-2019-3836
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVBELL-CVE-2019-3836 7.5

CVE-2019-3836 does not affect BellSoft software

Record
BELL-CVE-2019-3836
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
Show 6 moreShow less
OSV 7.5

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.

Record
CVE-2019-3836
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2019-3836 7.5

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.

Record
DEBIAN-CVE-2019-3836
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVRHSA-2019:3600 5.9

Red Hat Security Advisory: gnutls security, bug fix, and enhancement update

Record
RHSA-2019:3600
CVSS 3.0
5.9 MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVopenSUSE-SU-2019:1353-1 No score

Security update for gnutls

This update for gnutls fixes to version 3.6.7 the following issues:

Security issued fixed:

  • CVE-2019-3836: Fixed an invalid pointer access via malformed TLS1.3 async messages (bsc#1130682).
  • CVE-2019-3829: Fixed a double free vulnerability in the certificate verification API (bsc#1130681).
  • CVE-2018-16868: Fixed Bleichenbacher-like side channel leakage in PKCS#1 v1.5 verification and padding oracle verification (bsc#1118087)

Non-security issue fixed:

  • Update gnutls to support TLS 1.3 (fate#327114)

This update was imported from the SUSE:SLE-15:Update update project.

Record
openSUSE-SU-2019:1353-1
Updated
2026-11-02
OSVopenSUSE-SU-2024:10801-1 No score

gnutls-3.7.2-1.2 on GA media

These are all security issues fixed in the gnutls-3.7.2-1.2 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:10801-1
Updated
2026-11-02
OSVSUSE-SU-2019:1121-1 No score

Security update for gnutls

This update for gnutls fixes to version 3.6.7 the following issues:

Security issued fixed:

  • CVE-2019-3836: Fixed an invalid pointer access via malformed TLS1.3 async messages (bsc#1130682).
  • CVE-2019-3829: Fixed a double free vulnerability in the certificate verification API (bsc#1130681).
  • CVE-2018-16868: Fixed Bleichenbacher-like side channel leakage in PKCS#1 v1.5 verification and padding oracle verification (bsc#1118087)

Non-security issue fixed:

  • Update gnutls to support TLS 1.3 (fate#327114)
Record
SUSE-SU-2019:1121-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
gnutls
Alpine:v3.10
 3.6.3 up to 3.6.7-r0
3.6.7-r0
gnutls
Alpine:v3.11
 3.6.3 up to 3.6.7-r0
3.6.7-r0
gnutls
Alpine:v3.12
 3.6.3 up to 3.6.7-r0
3.6.7-r0
gnutls
Alpine:v3.13
 3.6.3 up to 3.6.7-r0
3.6.7-r0
gnutls
Alpine:v3.14
 3.6.3 up to 3.6.7-r0
3.6.7-r0
gnutls
Alpine:v3.15
 3.6.3 up to 3.6.7-r0
3.6.7-r0
gnutls
Alpine:v3.16
 3.6.3 up to 3.6.7-r0
3.6.7-r0
gnutls
Alpine:v3.17
 3.6.3 up to 3.6.7-r0
3.6.7-r0
gnutls
Alpine:v3.18
 3.6.3 up to 3.6.7-r0
3.6.7-r0
gnutls
Alpine:v3.19
 3.6.3 up to 3.6.7-r0
3.6.7-r0
Show 29 moreShow less
Affected packages
PackageAffectedFixed
gnutls
Alpine:v3.20
 3.6.3 up to 3.6.7-r0
3.6.7-r0
gnutls
Alpine:v3.21
 3.6.3 up to 3.6.7-r0
3.6.7-r0
gnutls
Alpine:v3.22
 3.6.3 up to 3.6.7-r0
3.6.7-r0
gnutls
Alpine:v3.23
 3.6.3 up to 3.6.7-r0
3.6.7-r0
gnutls
Alpine:v3.24
 3.6.3 up to 3.6.7-r0
3.6.7-r0
gnutls
Alpine:v3.8
 3.6.3 up to 3.6.7-r0
3.6.7-r0
gnutls
Alpine:v3.9
 3.6.3 up to 3.6.7-r0
3.6.7-r0
gnutls28
Debian:12
 before 3.6.7-2
3.6.7-2
gnutls28
Debian:13
 before 3.6.7-2
3.6.7-2
gnutls28
Debian:14
 before 3.6.7-2
3.6.7-2
gnutls-c++
Red Hat:enterprise_linux:8::appstream
From an advisory covering 2 CVEs
 before 0:3.6.8-8.el8
0:3.6.8-8.el8
gnutls-c++-debuginfo
Red Hat:enterprise_linux:8::appstream
From an advisory covering 2 CVEs
 before 0:3.6.8-8.el8
0:3.6.8-8.el8
gnutls-dane
Red Hat:enterprise_linux:8::appstream
From an advisory covering 2 CVEs
 before 0:3.6.8-8.el8
0:3.6.8-8.el8
gnutls-dane-debuginfo
Red Hat:enterprise_linux:8::appstream
From an advisory covering 2 CVEs
 before 0:3.6.8-8.el8
0:3.6.8-8.el8
gnutls-debuginfo
Red Hat:enterprise_linux:8::appstream
From an advisory covering 2 CVEs
 before 0:3.6.8-8.el8
0:3.6.8-8.el8
gnutls-debugsource
Red Hat:enterprise_linux:8::appstream
From an advisory covering 2 CVEs
 before 0:3.6.8-8.el8
0:3.6.8-8.el8
gnutls-devel
Red Hat:enterprise_linux:8::appstream
From an advisory covering 2 CVEs
 before 0:3.6.8-8.el8
0:3.6.8-8.el8
gnutls-utils
Red Hat:enterprise_linux:8::appstream
From an advisory covering 2 CVEs
 before 0:3.6.8-8.el8
0:3.6.8-8.el8
gnutls-utils-debuginfo
Red Hat:enterprise_linux:8::appstream
From an advisory covering 2 CVEs
 before 0:3.6.8-8.el8
0:3.6.8-8.el8
gnutls
Red Hat:enterprise_linux:8::baseos
From an advisory covering 2 CVEs
 before 0:3.6.8-8.el8
0:3.6.8-8.el8
gnutls-c++-debuginfo
Red Hat:enterprise_linux:8::baseos
From an advisory covering 2 CVEs
 before 0:3.6.8-8.el8
0:3.6.8-8.el8
gnutls-dane-debuginfo
Red Hat:enterprise_linux:8::baseos
From an advisory covering 2 CVEs
 before 0:3.6.8-8.el8
0:3.6.8-8.el8
gnutls-debuginfo
Red Hat:enterprise_linux:8::baseos
From an advisory covering 2 CVEs
 before 0:3.6.8-8.el8
0:3.6.8-8.el8
gnutls-debugsource
Red Hat:enterprise_linux:8::baseos
From an advisory covering 2 CVEs
 before 0:3.6.8-8.el8
0:3.6.8-8.el8
gnutls-utils-debuginfo
Red Hat:enterprise_linux:8::baseos
From an advisory covering 2 CVEs
 before 0:3.6.8-8.el8
0:3.6.8-8.el8
gnutls
SUSE:Linux Enterprise Module for Basesystem 15
From an advisory covering 3 CVEs
 before 3.6.7-6.8.1
3.6.7-6.8.1
gnutls
SUSE:Linux Enterprise Module for Desktop Applications 15
From an advisory covering 3 CVEs
 before 3.6.7-6.8.1
3.6.7-6.8.1
gnutls
openSUSE:Leap 15.0
From an advisory covering 3 CVEs
 before 3.6.7-lp150.9.1
3.6.7-lp150.9.1
gnutls
openSUSE:Tumbleweed
From an advisory covering 11 CVEs
 before 3.7.2-1.2
3.7.2-1.2

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2019-3836 is a medium vulnerability (CVSS 5.9) in Gnu Gnutls, published April 1, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.43%, the 88th percentile. Fixed in gnutls 3.6.7-r0.

References

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