NULL pointer dereference in OpenSSL - CVE-2026-28390

Vulnerability identifier: #VU125567

CSH Severity: Medium

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-28390

CWE-ID: CWE-476

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to NULL pointer dereference in CMS KeyTransportRecipientInfo processing when processing a crafted CMS EnvelopedData message using RSA-OAEP with a missing optional parameters field. A remote attacker can send a crafted CMS message to cause a denial of service.

Applications and services that call CMS_decrypt() on untrusted input, such as S/MIME processing or CMS-based protocols, are affected.

OpenSSL
Debian Linux
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Micro for Rancher
IBM i
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Fedora
Anolis OS
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Ubuntu
Web and Scripting Module
Basesystem Module
Legacy Module
Development Tools Module
openSUSE Leap
openEuler
IBM Cloud Pak System
LANTIME Operating System Firmware (LTOS)
IBM MQ for HPE NonStop
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
openssl (Ubuntu package)
openssl (Red Hat package)
compat-openssl10 (Red Hat package)
compat-openssl10
libopenssl-1_0_0-devel
openssl-1_0_0-debuginfo
openssl-1_0_0
openssl-1_0_0-debugsource
libopenssl1_0_0
openssl-1_0_0-doc
libopenssl1_0_0-debuginfo
libopenssl1_0_0-hmac
libopenssl1_0_0-hmac-32bit
libopenssl1_0_0-debuginfo-32bit
libopenssl-1_0_0-devel-32bit
libopenssl1_0_0-32bit
libopenssl10
libopenssl10-debuginfo
libopenssl1_1
openssl-1_1
libopenssl1_1-debuginfo
libopenssl1_1-hmac
openssl-1_1-debuginfo
openssl-1_1-debugsource
libopenssl1_1-hmac-32bit
libopenssl1_1-32bit
libopenssl-1_1-devel-32bit
libopenssl1_1-debuginfo-32bit
libopenssl-1_1-devel
openssl-debuginfo
openssl-debugsource
openssl-devel
openssl-libs
openssl-help
openssl
compat-openssl11 (Red Hat package)
openssl-perl
libopenssl1_1-64bit-debuginfo
libopenssl-1_1-devel-64bit
libopenssl1_1-32bit-debuginfo
libopenssl1_1-hmac-64bit
libopenssl1_1-64bit
openssl-1_1-doc
compat-openssl11-libs
compat-openssl11-devel
compat-openssl11-debugsource
compat-openssl11
compat-openssl11-debuginfo
gjs
gjs-devel
gjs-tests
gjs-doc
openssl-3-doc
libopenssl3-32bit
libopenssl3-64bit
libopenssl3-64bit-debuginfo
libopenssl-3-devel-64bit
libopenssl3-32bit-debuginfo
libopenssl-3-devel-32bit
libopenssl3
libopenssl3-debuginfo
openssl-3
openssl-3-debugsource
libopenssl-3-devel
openssl-3-debuginfo
openssl-doc
openssl (Debian package)
libopenssl-3-fips-provider
libopenssl-3-fips-provider-debuginfo
libopenssl-3-fips-provider-32bit
libopenssl-3-fips-provider-32bit-debuginfo
libopenssl-3-fips-provider-64bit
libopenssl-3-fips-provider-64bit-debuginfo
libopenssl-fips-provider
libopenssl-devel
openssl3
nodejs24-debuginfo
nodejs24-docs
npm24
nodejs24
nodejs24-debugsource
nodejs24-devel
rpm-ostree
rpm-ostree-devel
rpm-ostree-doc
rpm-ostree-libs
edk2-help
edk2-ovmf
python3-edk2-devel
edk2-aarch64
edk2-devel
edk2-debugsource
edk2-debuginfo
edk2
Splunk Universal Forwarder
InfoSphere Data Replication for z/OS Remote Source

Install security update from vendor's website.

OpenSSL - addressed in versions 1.0.2zp, 1.1.1zg, 3.0.20, 3.3.7, 3.4.5, 3.5.6, 3.6.2
IBM Cloud Pak System - update to 2.3.5.1
LANTIME Operating System Firmware (LTOS) - update to 7.10.012
IBM MQ for HPE NonStop - update to 8.1.0.40
Splunk Universal Forwarder - addressed in versions 9.4.13, 9.4.14, 10.0.8, 10.0.9, 10.2.5, 10.2.6, 10.4.1, 10.4.2
openssl (Ubuntu package) - addressed in versions 1.0.1f-1ubuntu2.27+esm13, 1.0.2g-1ubuntu4.20+esm15, 1.0.2n-1ubuntu5.13+esm4, 1.1.1f-1ubuntu2.24+esm3, 1.1.1-1ubuntu2.1~18.04.23+esm8, 3.0.2-0ubuntu1.23, 3.0.13-0ubuntu3.9, 3.5.3-1ubuntu3.3
openssl (Red Hat package) - addressed in versions 1.0.2k-26.el7_9.2, 1.1.1g-18.el8_4.3, 1.1.1k-17.el8_6, 3.5.5-3.el9_8
compat-openssl10 (Red Hat package) - addressed in versions 1.0.2o-3.el8_4.1, 1.0.2o-4.el8_8.1, 1.0.2o-4.el8_10.2
compat-openssl10 - update to 1.0.2o-4.0.2
libopenssl-1_0_0-devel - addressed in versions 1.0.2p-3.112.1, 1.0.2p-150000.3.111.2
openssl-1_0_0-debuginfo - addressed in versions 1.0.2p-3.112.1, 1.0.2p-150000.3.111.2
openssl-1_0_0 - addressed in versions 1.0.2p-3.112.1, 1.0.2p-150000.3.111.2
openssl-1_0_0-debugsource - addressed in versions 1.0.2p-3.112.1, 1.0.2p-150000.3.111.2
libopenssl1_0_0 - addressed in versions 1.0.2p-3.112.1, 1.0.2p-150000.3.111.2
openssl-1_0_0-doc - update to 1.0.2p-3.112.1
libopenssl1_0_0-debuginfo - addressed in versions 1.0.2p-3.112.1, 1.0.2p-150000.3.111.2
libopenssl1_0_0-hmac - addressed in versions 1.0.2p-3.112.1, 1.0.2p-150000.3.111.2
libopenssl1_0_0-hmac-32bit - update to 1.0.2p-3.112.1
libopenssl1_0_0-debuginfo-32bit - update to 1.0.2p-3.112.1
libopenssl-1_0_0-devel-32bit - update to 1.0.2p-3.112.1
libopenssl1_0_0-32bit - update to 1.0.2p-3.112.1
libopenssl10 - update to 1.0.2p-150000.3.111.2
libopenssl10-debuginfo - update to 1.0.2p-150000.3.111.2
libopenssl1_1 - addressed in versions 1.1.1d-2.128.1, 1.1.1l-150400.7.93.1, 1.1.1l-150500.17.54.1, 1.1.1w-150600.5.26.2, 1.1.1w-150700.11.16.1
openssl-1_1 - addressed in versions 1.1.1d-2.128.1, 1.1.1l-150400.7.93.1, 1.1.1l-150500.17.54.1, 1.1.1w-150600.5.26.2, 1.1.1w-150700.11.16.1
libopenssl1_1-debuginfo - addressed in versions 1.1.1d-2.128.1, 1.1.1l-150400.7.93.1, 1.1.1l-150500.17.54.1, 1.1.1w-150600.5.26.2, 1.1.1w-150700.11.16.1
libopenssl1_1-hmac - addressed in versions 1.1.1d-2.128.1, 1.1.1l-150400.7.93.1, 1.1.1l-150500.17.54.1
openssl-1_1-debuginfo - addressed in versions 1.1.1d-2.128.1, 1.1.1l-150400.7.93.1, 1.1.1l-150500.17.54.1, 1.1.1w-150600.5.26.2, 1.1.1w-150700.11.16.1
openssl-1_1-debugsource - addressed in versions 1.1.1d-2.128.1, 1.1.1l-150400.7.93.1, 1.1.1l-150500.17.54.1, 1.1.1w-150600.5.26.2, 1.1.1w-150700.11.16.1
libopenssl1_1-hmac-32bit - addressed in versions 1.1.1d-2.128.1, 1.1.1l-150400.7.93.1, 1.1.1l-150500.17.54.1
libopenssl1_1-32bit - addressed in versions 1.1.1d-2.128.1, 1.1.1l-150400.7.93.1, 1.1.1l-150500.17.54.1, 1.1.1w-150600.5.26.2, 1.1.1w-150700.11.16.1
libopenssl-1_1-devel-32bit - addressed in versions 1.1.1d-2.128.1, 1.1.1l-150400.7.93.1, 1.1.1l-150500.17.54.1, 1.1.1w-150600.5.26.2
libopenssl1_1-debuginfo-32bit - update to 1.1.1d-2.128.1
libopenssl-1_1-devel - addressed in versions 1.1.1d-2.128.1, 1.1.1l-150400.7.93.1, 1.1.1l-150500.17.54.1, 1.1.1w-150600.5.26.2, 1.1.1w-150700.11.16.1
openssl-debuginfo - addressed in versions 1.1.1f-42, 1.1.1wa-16, 3.0.12-47
openssl-debugsource - addressed in versions 1.1.1f-42, 1.1.1wa-16, 3.0.12-47
openssl-devel - addressed in versions 1.1.1f-42, 1.1.1wa-16, 3.0.12-47
openssl-libs - addressed in versions 1.1.1f-42, 1.1.1wa-16, 3.0.12-47
openssl-help - addressed in versions 1.1.1f-42, 1.1.1wa-16, 3.0.12-47
openssl - addressed in versions 1.1.1f-42, 1.1.1wa-16, 3.0.12-47
compat-openssl11 (Red Hat package) - addressed in versions 1.1.1k-4.el9_2.2, 1.1.1k-5.el9_6.3, 1.1.1k-5.el9_8.3
openssl - addressed in versions 1.1.1k-17.0.1, 3.0.12-20
openssl-perl - addressed in versions 1.1.1k-17.0.1, 3.0.12-20
openssl-libs - addressed in versions 1.1.1k-17.0.1, 3.0.12-20
openssl-devel - addressed in versions 1.1.1k-17.0.1, 3.0.12-20
libopenssl1_1-64bit-debuginfo - addressed in versions 1.1.1l-150400.7.93.1, 1.1.1l-150500.17.54.1, 1.1.1w-150600.5.26.2
libopenssl-1_1-devel-64bit - addressed in versions 1.1.1l-150400.7.93.1, 1.1.1l-150500.17.54.1, 1.1.1w-150600.5.26.2
libopenssl1_1-32bit-debuginfo - addressed in versions 1.1.1l-150400.7.93.1, 1.1.1l-150500.17.54.1, 1.1.1w-150600.5.26.2, 1.1.1w-150700.11.16.1
libopenssl1_1-hmac-64bit - addressed in versions 1.1.1l-150400.7.93.1, 1.1.1l-150500.17.54.1
libopenssl1_1-64bit - addressed in versions 1.1.1l-150400.7.93.1, 1.1.1l-150500.17.54.1, 1.1.1w-150600.5.26.2
openssl-1_1-doc - addressed in versions 1.1.1l-150400.7.93.1, 1.1.1l-150500.17.54.1, 1.1.1w-150600.5.26.2
compat-openssl11-libs - update to 1.1.1m-18
compat-openssl11-devel - update to 1.1.1m-18
compat-openssl11-debugsource - update to 1.1.1m-18
compat-openssl11 - update to 1.1.1m-18
compat-openssl11-debuginfo - update to 1.1.1m-18
openssl-perl - addressed in versions 1.1.1wa-16, 3.0.12-47
gjs - update to 1.80.2-3
gjs-devel - update to 1.80.2-3
gjs-tests - update to 1.80.2-3
gjs-doc - update to 1.80.2-3
openssl-3-doc - addressed in versions 3.0.8-150400.4.84.1, 3.0.8-150500.5.63.1, 3.1.4-150600.5.50.1
libopenssl3-32bit - addressed in versions 3.0.8-150400.4.84.1, 3.0.8-150500.5.63.1, 3.1.4-150600.5.50.1, 3.2.3-150700.5.31.1, 3.5.0-150700.5.45.2
libopenssl3-64bit - addressed in versions 3.0.8-150400.4.84.1, 3.0.8-150500.5.63.1, 3.1.4-150600.5.50.1
libopenssl3-64bit-debuginfo - addressed in versions 3.0.8-150400.4.84.1, 3.0.8-150500.5.63.1, 3.1.4-150600.5.50.1
libopenssl-3-devel-64bit - addressed in versions 3.0.8-150400.4.84.1, 3.0.8-150500.5.63.1, 3.1.4-150600.5.50.1
libopenssl3-32bit-debuginfo - addressed in versions 3.0.8-150400.4.84.1, 3.0.8-150500.5.63.1, 3.1.4-150600.5.50.1, 3.2.3-150700.5.31.1, 3.5.0-150700.5.45.2
libopenssl-3-devel-32bit - addressed in versions 3.0.8-150400.4.84.1, 3.0.8-150500.5.63.1, 3.1.4-150600.5.50.1
libopenssl3 - addressed in versions 3.0.8-150400.4.84.1, 3.0.8-150500.5.63.1, 3.1.4-150600.5.50.1, 3.2.3-150700.5.31.1, 3.5.0-150700.5.45.2
libopenssl3-debuginfo - addressed in versions 3.0.8-150400.4.84.1, 3.0.8-150500.5.63.1, 3.1.4-150600.5.50.1, 3.2.3-150700.5.31.1, 3.5.0-150700.5.45.2
openssl-3 - addressed in versions 3.0.8-150400.4.84.1, 3.0.8-150500.5.63.1, 3.1.4-150600.5.50.1, 3.2.3-150700.5.31.1, 3.5.0-150700.5.45.2
openssl-3-debugsource - addressed in versions 3.0.8-150400.4.84.1, 3.0.8-150500.5.63.1, 3.1.4-150600.5.50.1, 3.2.3-150700.5.31.1, 3.5.0-150700.5.45.2
libopenssl-3-devel - addressed in versions 3.0.8-150400.4.84.1, 3.0.8-150500.5.63.1, 3.1.4-150600.5.50.1, 3.2.3-150700.5.31.1, 3.5.0-150700.5.45.2
openssl-3-debuginfo - addressed in versions 3.0.8-150400.4.84.1, 3.0.8-150500.5.63.1, 3.1.4-150600.5.50.1, 3.2.3-150700.5.31.1, 3.5.0-150700.5.45.2
openssl-doc - update to 3.0.12-20
openssl (Debian package) - addressed in versions 3.0.19-1~deb12u2, 3.5.5-1~deb13u2
libopenssl-3-fips-provider - addressed in versions 3.1.4-150600.5.50.1, 3.2.3-150700.5.31.1, 3.5.0-150700.5.45.2
libopenssl-3-fips-provider-debuginfo - addressed in versions 3.1.4-150600.5.50.1, 3.2.3-150700.5.31.1, 3.5.0-150700.5.45.2
libopenssl-3-fips-provider-32bit - addressed in versions 3.1.4-150600.5.50.1, 3.2.3-150700.5.31.1, 3.5.0-150700.5.45.2
libopenssl-3-fips-provider-32bit-debuginfo - addressed in versions 3.1.4-150600.5.50.1, 3.2.3-150700.5.31.1, 3.5.0-150700.5.45.2
libopenssl-3-fips-provider-64bit - update to 3.1.4-150600.5.50.1
libopenssl-3-fips-provider-64bit-debuginfo - update to 3.1.4-150600.5.50.1
libopenssl-fips-provider - update to 3.5.0-150700.3.4.1
libopenssl-devel - update to 3.5.0-150700.3.4.1
openssl - update to 3.5.0-150700.3.4.1
openssl - update to 3.5.4-3.fc43
openssl3 - update to 3.5.5-5.el8
InfoSphere Data Replication for z/OS Remote Source - addressed in versions 11.4 Fix Pack 14 29, 11.4 Fix Pack 14 182, 11.4 Fix Pack 27 29, 11.4 Fix Pack 27 182
nodejs24-debuginfo - update to 24.18.1-150700.15.18.1
nodejs24-docs - update to 24.18.1-150700.15.18.1
npm24 - update to 24.18.1-150700.15.18.1
nodejs24 - update to 24.18.1-150700.15.18.1
nodejs24-debugsource - update to 24.18.1-150700.15.18.1
nodejs24-devel - update to 24.18.1-150700.15.18.1
rpm-ostree - update to 2025.5-3
rpm-ostree-devel - update to 2025.5-3
rpm-ostree-doc - update to 2025.5-3
rpm-ostree-libs - update to 2025.5-3
edk2-help - addressed in versions 202308-34, 202308-40
edk2-ovmf - addressed in versions 202308-34, 202308-40
python3-edk2-devel - addressed in versions 202308-34, 202308-40
edk2-aarch64 - addressed in versions 202308-34, 202308-40
edk2-devel - addressed in versions 202308-34, 202308-40
edk2-debugsource - addressed in versions 202308-34, 202308-40
edk2-debuginfo - addressed in versions 202308-34, 202308-40
edk2 - addressed in versions 202308-34, 202308-40
edk2 - addressed in versions 20260213-3.fc43, 20260213-4.fc43

• https://openssl-library.org/news/secadv/20260407.txt

• Multiple vulnerabilities in OpenSSL
• Debian update for openssl
• Fedora 43 update for edk2
• Ubuntu update for openssl
• Ubuntu update for openssl
• Anolis OS update for openssl
• SUSE update for openssl-3
• SUSE update for openssl-1_1
• SUSE update for openssl-3
• Fedora 43 update for openssl
• SUSE update for openssl-1_1
• SUSE update for openssl-1_1
• Fedora 43 update for edk2
• SUSE update for openssl-1_1
• SUSE update for openssl-1_1
• SUSE update for openssl-3
• openEuler 22.03 LTS SP4 update for openssl
• openEuler 20.03 LTS SP4 update for openssl
• openEuler 24.03 LTS SP3 update for openssl
• openEuler 24.03 LTS SP1 update for openssl
• openEuler 24.03 LTS update for openssl
• Anolis OS update for gjs
• Anolis OS update for rpm-ostree
• openEuler 24.03 LTS SP3 update for compat-openssl11
• openEuler 24.03 LTS SP1 update for compat-openssl11
• openEuler 24.03 LTS update for compat-openssl11
• SUSE update for openssl-3
• Red Hat Enterprise Linux 9 update for openssl
• Red Hat Enterprise Linux 9 update for compat-openssl11
• Red Hat Enterprise Linux 8 update for compat-openssl10
• Multiple vulnerabilities in IBM i
• Anolis OS update for compat-openssl10
• openEuler 24.03 LTS SP1 update for edk2
• openEuler 24.03 LTS SP3 update for edk2
• Multiple vulnerabilities in IBM Cloud Pak System
• Multiple vulnerabilities in IBM MQ for HPE NonStop
• Red Hat Enterprise Linux 9 update for compat-openssl11
• IBM InfoSphere Data Replication for z/OS Remote Source update for OpenSSL FIPS
• Red Hat Enterprise Linux 8 update for compat-openssl10
• Red Hat Enterprise Linux 8 update for openssl
• Red Hat Enterprise Linux 8 update for openssl
• Red Hat Enterprise Linux 9 update for compat-openssl11
• Anolis OS update for openssl
• Splunk Universal Forwarder update for third-party components (July 2026)
• Red Hat Enterprise Linux 8 update for openssl
• Fedora EPEL 8 update for openssl3
• Red Hat Enterprise Linux 8 update for compat-openssl10
• SUSE update for openssl-1_0_0
• SUSE update for openssl-1_0_0
• Multiple vulnerabilities in Meinberg LANTIME Operating System Firmware
• Splunk Universal Forwarder update for third-party components
• Red Hat Enterprise Linux 7 Extended Lifecycle Support update for openssl
• SUSE update for openssl, openssl-3