Improper Verification of Cryptographic Signature in OpenSSL - CVE-2026-45446

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Main Vulnerability Database Vulnerabilities #VU134287

Improper Verification of Cryptographic Signature in OpenSSL - CVE-2026-45446

Published: June 10, 2026


Vulnerability identifier: #VU134287
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-45446
CWE-ID: CWE-347
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to forge empty messages with arbitrary additional authenticated data.

The vulnerability exists due to incorrect tag processing in the AES-GCM-SIV and AES-SIV provider implementations when decrypting messages with empty ciphertext and supplied additional authenticated data. A remote attacker can send a crafted message with empty ciphertext and a forged tag to forge empty messages with arbitrary additional authenticated data.

The issue is reachable only in applications that implement their own protocol with the EVP interface and skip the ciphertext update when a message with empty ciphertext arrives.


Affected software

OpenSSL
Debian Linux
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Micro for Rancher
SUSE Linux Enterprise Micro
IBM i
Fedora
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
FreeBSD
Basesystem Module
openSUSE Leap
Ubuntu
openEuler
IBM Cloud Pak for Data System
IBM MQ Operator
LANTIME Operating System Firmware (LTOS)
IBM supplied MQ Advanced container images
Operator for PostgreSQL
openssl (Ubuntu package)
libopenssl3-32bit-debuginfo
openssl-3-debuginfo
openssl-3-debugsource
libopenssl3
openssl-3
libopenssl-3-devel
libopenssl3-debuginfo
libopenssl3-32bit
libopenssl-3-devel-32bit
libopenssl3-64bit-debuginfo
libopenssl3-64bit
libopenssl-3-devel-64bit
openssl-3-doc
openssl-help
openssl-debugsource
openssl-perl
openssl-libs
openssl-devel
openssl-debuginfo
openssl
openssl (Debian package)
libopenssl-3-fips-provider
libopenssl-3-fips-provider-debuginfo
libopenssl-3-fips-provider-32bit-debuginfo
libopenssl-3-fips-provider-32bit
libopenssl-3-fips-provider-64bit
libopenssl-3-fips-provider-64bit-debuginfo
openssl (Red Hat package)
openssl3
EntireX

How to mitigate CVE-2026-45446

Install security update from vendor's website.

OpenSSL - addressed in versions 3.0.21, 3.4.6, 3.5.7, 3.6.3, 4.0.1
IBM Cloud Pak for Data System - update to 8.10.26.07.SP3
IBM MQ Operator - addressed in versions 3.2.26 SC2, 4.0.1 SC2
LANTIME Operating System Firmware (LTOS) - update to 7.10.013
IBM supplied MQ Advanced container images - update to 10.0.0.0-r2
openssl (Ubuntu package) - addressed in versions 3.0.2-0ubuntu1.25, 3.0.13-0ubuntu3.11, 3.5.3-1ubuntu3.4, 3.5.5-1ubuntu3.2
libopenssl3-32bit-debuginfo - addressed in versions 3.0.8-150400.4.87.1, 3.0.8-150500.5.66.1, 3.1.4-150600.5.53.1, 3.2.3-150700.5.36.1
openssl-3-debuginfo - addressed in versions 3.0.8-150400.4.87.1, 3.0.8-150500.5.66.1, 3.1.4-150600.5.53.1, 3.2.3-150700.5.36.1
openssl-3-debugsource - addressed in versions 3.0.8-150400.4.87.1, 3.0.8-150500.5.66.1, 3.1.4-150600.5.53.1, 3.2.3-150700.5.36.1
libopenssl3 - addressed in versions 3.0.8-150400.4.87.1, 3.0.8-150500.5.66.1, 3.1.4-150600.5.53.1, 3.2.3-150700.5.36.1
openssl-3 - addressed in versions 3.0.8-150400.4.87.1, 3.0.8-150500.5.66.1, 3.1.4-150600.5.53.1, 3.2.3-150700.5.36.1
libopenssl-3-devel - addressed in versions 3.0.8-150400.4.87.1, 3.0.8-150500.5.66.1, 3.1.4-150600.5.53.1, 3.2.3-150700.5.36.1
libopenssl3-debuginfo - addressed in versions 3.0.8-150400.4.87.1, 3.0.8-150500.5.66.1, 3.1.4-150600.5.53.1, 3.2.3-150700.5.36.1
libopenssl3-32bit - addressed in versions 3.0.8-150400.4.87.1, 3.0.8-150500.5.66.1, 3.1.4-150600.5.53.1, 3.2.3-150700.5.36.1
libopenssl-3-devel-32bit - addressed in versions 3.0.8-150400.4.87.1, 3.0.8-150500.5.66.1, 3.1.4-150600.5.53.1
libopenssl3-64bit-debuginfo - addressed in versions 3.0.8-150400.4.87.1, 3.0.8-150500.5.66.1, 3.1.4-150600.5.53.1
libopenssl3-64bit - addressed in versions 3.0.8-150400.4.87.1, 3.0.8-150500.5.66.1, 3.1.4-150600.5.53.1
libopenssl-3-devel-64bit - addressed in versions 3.0.8-150400.4.87.1, 3.0.8-150500.5.66.1, 3.1.4-150600.5.53.1
openssl-3-doc - addressed in versions 3.0.8-150400.4.87.1, 3.0.8-150500.5.66.1, 3.1.4-150600.5.53.1
openssl-help - update to 3.0.12-52
openssl-debugsource - update to 3.0.12-52
openssl-perl - update to 3.0.12-52
openssl-libs - update to 3.0.12-52
openssl-devel - update to 3.0.12-52
openssl-debuginfo - update to 3.0.12-52
openssl - update to 3.0.12-52
openssl (Debian package) - addressed in versions 3.0.20-1~deb12u2, 3.5.6-1~deb13u2
libopenssl-3-fips-provider - addressed in versions 3.1.4-150600.5.53.1, 3.2.3-150700.5.36.1
libopenssl-3-fips-provider-debuginfo - addressed in versions 3.1.4-150600.5.53.1, 3.2.3-150700.5.36.1
libopenssl-3-fips-provider-32bit-debuginfo - addressed in versions 3.1.4-150600.5.53.1, 3.2.3-150700.5.36.1
libopenssl-3-fips-provider-32bit - addressed in versions 3.1.4-150600.5.53.1, 3.2.3-150700.5.36.1
libopenssl-3-fips-provider-64bit - update to 3.1.4-150600.5.53.1
libopenssl-3-fips-provider-64bit-debuginfo - update to 3.1.4-150600.5.53.1
openssl (Red Hat package) - addressed in versions 3.5.5-4.el9_8, 3.5.5-4.el10_2
openssl3 - update to 3.5.5-5.el8
openssl - update to 3.5.7-1.fc44
EntireX - update to 11.1 Fix6

External References

Related Security Bulletins