Unchecked Return Value in OpenSSL - CVE-2026-31790

Vulnerability identifier: #VU125562

CSH Severity: Medium

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

CVE-ID: CVE-2026-31790

CWE-ID: CWE-252

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists due to incorrect failure handling in RSA KEM RSASVE encapsulation when processing an attacker-supplied invalid RSA public key with EVP_PKEY_encapsulate(). A remote attacker can supply an invalid RSA public key to disclose sensitive information.

The issue affects applications using RSA/RSASVE encapsulation without validating the supplied public key first.

OpenSSL
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP6
Debian Linux
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Micro for Rancher
Fedora
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Ubuntu
Basesystem Module
Legacy Module
openSUSE Leap
Anolis OS
openEuler
IBM Cloud Pak System
IBM MQ Operator
IBM MQ for HPE NonStop
LANTIME Operating System Firmware (LTOS)
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
openssl (Ubuntu package)
openssl-1_0_0-debugsource
libopenssl1_0_0-32bit
libopenssl-1_0_0-devel-32bit
libopenssl1_0_0-debuginfo-32bit
libopenssl1_0_0-hmac-32bit
openssl-1_0_0-doc
libopenssl1_0_0-debuginfo
openssl-1_0_0-debuginfo
libopenssl1_0_0
openssl-1_0_0
libopenssl-1_0_0-devel
libopenssl1_0_0-hmac
libopenssl1_0_0-steam
libopenssl1_0_0-steam-32bit-debuginfo
libopenssl1_0_0-32bit-debuginfo
libopenssl1_0_0-steam-32bit
openssl-1_0_0-cavs-debuginfo
libopenssl10-debuginfo
libopenssl10
openssl-1_0_0-cavs
libopenssl1_0_0-steam-debuginfo
libopenssl1_1-hmac
libopenssl1_1-debuginfo
libopenssl-1_1-devel
openssl-1_1
openssl-1_1-debuginfo
libopenssl1_1
openssl-1_1-debugsource
libopenssl1_1-64bit-debuginfo
libopenssl1_1-hmac-64bit
libopenssl-1_1-devel-64bit
libopenssl1_1-64bit
openssl-1_1-doc
libopenssl1_1-32bit
libopenssl-1_1-devel-32bit
libopenssl1_1-32bit-debuginfo
libopenssl1_1-hmac-32bit
openssl-fips-provider (Red Hat package)
openssl-3
libopenssl-3-devel-32bit
openssl-3-doc
libopenssl3-64bit
libopenssl-3-devel-64bit
libopenssl3-64bit-debuginfo
libopenssl3-32bit
libopenssl3-32bit-debuginfo
libopenssl-3-devel
libopenssl3-debuginfo
openssl-3-debuginfo
libopenssl3
openssl-3-debugsource
openssl
openssl-devel
openssl-libs
openssl-perl
openssl-doc
openssl-debuginfo
openssl-help
openssl-debugsource
openssl (Debian package)
libopenssl-3-fips-provider-64bit
libopenssl-3-fips-provider-64bit-debuginfo
libopenssl-3-fips-provider-32bit
libopenssl-3-fips-provider-32bit-debuginfo
libopenssl-3-fips-provider-debuginfo
libopenssl-3-fips-provider
openssl3
shim-unsigned-ia32
shim-unsigned-x64
python3-edk2-devel
edk2-ovmf
edk2-help
edk2-aarch64
edk2-devel
edk2-debugsource
edk2-debuginfo
edk2
IBM supplied MQ Advanced container images
InfoSphere Data Replication for z/OS Remote Source
Splunk Universal Forwarder
Oracle Database Server
Red Hat OpenShift Container Platform

Install security update from vendor's website.

OpenSSL - addressed in versions 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
IBM MQ Operator - addressed in versions 3.2.26 SC2, 4.0.1 SC2
LANTIME Operating System Firmware (LTOS) - update to 7.10.012
IBM MQ for HPE NonStop - update to 8.1.0.40
IBM supplied MQ Advanced container images - update to 10.0.0.0-r2
Splunk Universal Forwarder - addressed in versions 9.4.14, 10.0.9, 10.2.6, 10.4.2
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
Oracle Database Server - update to 19.4
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-1_0_0-debugsource - addressed in versions 1.0.2p-3.106.1, 1.0.2p-150000.3.105.1
libopenssl1_0_0-32bit - addressed in versions 1.0.2p-3.106.1, 1.0.2p-150000.3.105.1
libopenssl-1_0_0-devel-32bit - addressed in versions 1.0.2p-3.106.1, 1.0.2p-150000.3.105.1
libopenssl1_0_0-debuginfo-32bit - update to 1.0.2p-3.106.1
libopenssl1_0_0-hmac-32bit - addressed in versions 1.0.2p-3.106.1, 1.0.2p-150000.3.105.1
openssl-1_0_0-doc - addressed in versions 1.0.2p-3.106.1, 1.0.2p-150000.3.105.1
libopenssl1_0_0-debuginfo - addressed in versions 1.0.2p-3.106.1, 1.0.2p-150000.3.105.1
openssl-1_0_0-debuginfo - addressed in versions 1.0.2p-3.106.1, 1.0.2p-150000.3.105.1
libopenssl1_0_0 - addressed in versions 1.0.2p-3.106.1, 1.0.2p-150000.3.105.1
openssl-1_0_0 - addressed in versions 1.0.2p-3.106.1, 1.0.2p-150000.3.105.1
libopenssl-1_0_0-devel - addressed in versions 1.0.2p-3.106.1, 1.0.2p-150000.3.105.1
libopenssl1_0_0-hmac - addressed in versions 1.0.2p-3.106.1, 1.0.2p-150000.3.105.1
libopenssl1_0_0-steam - update to 1.0.2p-150000.3.105.1
libopenssl1_0_0-steam-32bit-debuginfo - update to 1.0.2p-150000.3.105.1
libopenssl1_0_0-32bit-debuginfo - update to 1.0.2p-150000.3.105.1
libopenssl1_0_0-steam-32bit - update to 1.0.2p-150000.3.105.1
openssl-1_0_0-cavs-debuginfo - update to 1.0.2p-150000.3.105.1
libopenssl10-debuginfo - update to 1.0.2p-150000.3.105.1
libopenssl10 - update to 1.0.2p-150000.3.105.1
openssl-1_0_0-cavs - update to 1.0.2p-150000.3.105.1
libopenssl1_0_0-steam-debuginfo - update to 1.0.2p-150000.3.105.1
libopenssl1_1-hmac - addressed in versions 1.1.1d-150200.11.109.1, 1.1.1l-150400.7.90.1
libopenssl1_1-debuginfo - addressed in versions 1.1.1d-150200.11.109.1, 1.1.1l-150400.7.90.1
libopenssl-1_1-devel - addressed in versions 1.1.1d-150200.11.109.1, 1.1.1l-150400.7.90.1
openssl-1_1 - addressed in versions 1.1.1d-150200.11.109.1, 1.1.1l-150400.7.90.1
openssl-1_1-debuginfo - addressed in versions 1.1.1d-150200.11.109.1, 1.1.1l-150400.7.90.1
libopenssl1_1 - addressed in versions 1.1.1d-150200.11.109.1, 1.1.1l-150400.7.90.1
openssl-1_1-debugsource - addressed in versions 1.1.1d-150200.11.109.1, 1.1.1l-150400.7.90.1
libopenssl1_1-64bit-debuginfo - update to 1.1.1l-150400.7.90.1
libopenssl1_1-hmac-64bit - update to 1.1.1l-150400.7.90.1
libopenssl-1_1-devel-64bit - update to 1.1.1l-150400.7.90.1
libopenssl1_1-64bit - update to 1.1.1l-150400.7.90.1
openssl-1_1-doc - update to 1.1.1l-150400.7.90.1
libopenssl1_1-32bit - update to 1.1.1l-150400.7.90.1
libopenssl-1_1-devel-32bit - update to 1.1.1l-150400.7.90.1
libopenssl1_1-32bit-debuginfo - update to 1.1.1l-150400.7.90.1
libopenssl1_1-hmac-32bit - update to 1.1.1l-150400.7.90.1
openssl-fips-provider (Red Hat package) - addressed in versions 3.0.7-11.el9_0, 3.0.7-11.el10_0
openssl-3 - addressed in versions 3.0.8-150400.4.81.1, 3.0.8-150500.5.60.1, 3.1.4-150600.5.45.1, 3.2.3-150700.5.31.1
libopenssl-3-devel-32bit - addressed in versions 3.0.8-150400.4.81.1, 3.0.8-150500.5.60.1, 3.1.4-150600.5.45.1
openssl-3-doc - addressed in versions 3.0.8-150400.4.81.1, 3.0.8-150500.5.60.1, 3.1.4-150600.5.45.1
libopenssl3-64bit - addressed in versions 3.0.8-150400.4.81.1, 3.0.8-150500.5.60.1, 3.1.4-150600.5.45.1
libopenssl-3-devel-64bit - addressed in versions 3.0.8-150400.4.81.1, 3.0.8-150500.5.60.1, 3.1.4-150600.5.45.1
libopenssl3-64bit-debuginfo - addressed in versions 3.0.8-150400.4.81.1, 3.0.8-150500.5.60.1, 3.1.4-150600.5.45.1
libopenssl3-32bit - addressed in versions 3.0.8-150400.4.81.1, 3.0.8-150500.5.60.1, 3.1.4-150600.5.45.1, 3.2.3-150700.5.31.1
libopenssl3-32bit-debuginfo - addressed in versions 3.0.8-150400.4.81.1, 3.0.8-150500.5.60.1, 3.1.4-150600.5.45.1, 3.2.3-150700.5.31.1
libopenssl-3-devel - addressed in versions 3.0.8-150400.4.81.1, 3.0.8-150500.5.60.1, 3.1.4-150600.5.45.1, 3.2.3-150700.5.31.1
libopenssl3-debuginfo - addressed in versions 3.0.8-150400.4.81.1, 3.0.8-150500.5.60.1, 3.1.4-150600.5.45.1, 3.2.3-150700.5.31.1
openssl-3-debuginfo - addressed in versions 3.0.8-150400.4.81.1, 3.0.8-150500.5.60.1, 3.1.4-150600.5.45.1, 3.2.3-150700.5.31.1
libopenssl3 - addressed in versions 3.0.8-150400.4.81.1, 3.0.8-150500.5.60.1, 3.1.4-150600.5.45.1, 3.2.3-150700.5.31.1
openssl-3-debugsource - addressed in versions 3.0.8-150400.4.81.1, 3.0.8-150500.5.60.1, 3.1.4-150600.5.45.1, 3.2.3-150700.5.31.1
openssl - update to 3.0.12-21
openssl-devel - update to 3.0.12-21
openssl-libs - update to 3.0.12-21
openssl-perl - update to 3.0.12-21
openssl-doc - update to 3.0.12-21
openssl-debuginfo - update to 3.0.12-47
openssl - update to 3.0.12-47
openssl-help - update to 3.0.12-47
openssl-perl - update to 3.0.12-47
openssl-libs - update to 3.0.12-47
openssl-devel - update to 3.0.12-47
openssl-debugsource - update to 3.0.12-47
openssl (Debian package) - addressed in versions 3.0.19-1~deb12u2, 3.5.5-1~deb13u2
libopenssl-3-fips-provider-64bit - update to 3.1.4-150600.5.45.1
libopenssl-3-fips-provider-64bit-debuginfo - update to 3.1.4-150600.5.45.1
libopenssl-3-fips-provider-32bit - addressed in versions 3.1.4-150600.5.45.1, 3.2.3-150700.5.31.1
libopenssl-3-fips-provider-32bit-debuginfo - addressed in versions 3.1.4-150600.5.45.1, 3.2.3-150700.5.31.1
libopenssl-3-fips-provider-debuginfo - addressed in versions 3.1.4-150600.5.45.1, 3.2.3-150700.5.31.1
libopenssl-3-fips-provider - addressed in versions 3.1.4-150600.5.45.1, 3.2.3-150700.5.31.1
openssl3 - update to 3.5.5-5.el8
Red Hat OpenShift Container Platform - update to 4.19.40
shim-unsigned-ia32 - update to 15.8-4
shim-unsigned-x64 - update to 15.8-4
python3-edk2-devel - addressed in versions 202308-33, 202308-37
edk2-ovmf - addressed in versions 202308-33, 202308-37
edk2-help - addressed in versions 202308-33, 202308-37
edk2-aarch64 - addressed in versions 202308-33, 202308-37
edk2-devel - addressed in versions 202308-33, 202308-37
edk2-debugsource - addressed in versions 202308-33, 202308-37
edk2-debuginfo - addressed in versions 202308-33, 202308-37
edk2 - addressed in versions 202308-33, 202308-37

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

• Multiple vulnerabilities in OpenSSL
• Debian update for openssl
• SUSE update for openssl-3
• SUSE update for openssl-3
• SUSE update for openssl-3
• SUSE update for openssl-1_1
• Ubuntu update for openssl
• Ubuntu update for openssl
• SUSE update for openssl-1_0_0
• SUSE update for openssl-1_1
• SUSE update for openssl-1_0_0
• SUSE update for openssl-3
• Anolis OS update for openssl
• Multiple vulnerabilities in Oracle Database Server
• openEuler 24.03 LTS SP3 update for openssl
• openEuler 24.03 LTS SP1 update for openssl
• openEuler 24.03 LTS update for openssl
• openEuler 24.03 LTS SP3 update for edk2
• openEuler 24.03 LTS SP1 update for edk2
• Red Hat Enterprise Linux 10 update for openssl-fips-provider
• Red Hat Enterprise Linux 9 update for openssl-fips-provider
• Multiple vulnerabilities in IBM Cloud Pak System
• Anolis OS update for shim-unsigned-x64
• Multiple vulnerabilities in IBM MQ for HPE NonStop
• IBM InfoSphere Data Replication for z/OS Remote Source update for OpenSSL FIPS
• Multiple vulnerabilities in IBM MQ Operator and Queue manager container images
• Fedora EPEL 8 update for openssl3
• Multiple vulnerabilities in Red Hat OpenShift Container Platform 4.19
• Multiple vulnerabilities in Meinberg LANTIME Operating System Firmware
• Splunk Universal Forwarder update for third-party components