CVE-2026-42766
Fixed in a distro release EPSS 1%CVSS 5.9
Issue summary: A specially crafted password-encrypted CMS message can trigger a NULL pointer dereference during CMS decryption. Impact summary: This NULL pointer dereference leads to an application crash and a Denial of Service. The CMS PasswordRecipientInfo.keyDerivationAlgorithm field is defined as OPTIONAL in the ASN.1 specification and may therefore be absent in specially crafted inputs. During the password-based CMS decryption the OpenSSL CMS implementation dereferences this field without first checking whether it was present. An attacker who supplies such a CMS message to an application performing password-based CMS decryption can trigger an application crash, leading to a Denial of Service. Applications that process password-encrypted CMS messages may be affected. The FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by this issue, as the affected code is outside the OpenSSL FIPS module boundary.
Products: OpenSSL
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux:10 | openssl | 1:3.5.5-4.el10_2.alma.1 |
| AlmaLinux:10 | openssl-devel | 1:3.5.5-4.el10_2.alma.1 |
| AlmaLinux:10 | openssl-libs | 1:3.5.5-4.el10_2.alma.1 |
| AlmaLinux:10 | openssl-perl | 1:3.5.5-4.el10_2.alma.1 |
| AlmaLinux:9 | openssl | 1:3.5.5-4.el9_8 |
| AlmaLinux:9 | openssl-devel | 1:3.5.5-4.el9_8 |
| AlmaLinux:9 | openssl-libs | 1:3.5.5-4.el9_8 |
| AlmaLinux:9 | openssl-perl | 1:3.5.5-4.el9_8 |
| Alpine:v3.21 | openssl | 3.3.7-r1 |
| Alpine:v3.22 | openssl | 3.5.7-r0 |
| Alpine:v3.23 | openssl | 3.5.7-r0 |
| Alpine:v3.24 | openssl | 3.5.7-r0 |
| Chainguard | libcrypto3 | 3.6.3-r0 |
| Chainguard | libcrypto3-2.34 | 3.6.3-r0 |
| Chainguard | openssl | 3.6.3-r0 |
| Chainguard | openssl-provider-fips-3.4.0 | 0 |
| Chainguard | openssl-provider-fips-3.4.0-dbg | 0 |
| Chainguard | openssl-provider-fips-3.6.0 | 0 |
| Chainguard | openssl-provider-fips-3.6.0-dbg | 0 |
| Debian:12 | openssl | 3.0.20-1~deb12u2 |
| Debian:13 | openssl | 3.5.6-1~deb13u2 |
| Debian:14 | openssl | 3.6.3-1 |
| Red Hat:enterprise_linux:10.2 | openssl | 1:3.5.5-4.el10_2 |
| Red Hat:enterprise_linux:10.2 | openssl-debuginfo | 1:3.5.5-4.el10_2 |
| Red Hat:enterprise_linux:10.2 | openssl-debugsource | 1:3.5.5-4.el10_2 |
| Red Hat:enterprise_linux:10.2 | openssl-devel | 1:3.5.5-4.el10_2 |
| Red Hat:enterprise_linux:10.2 | openssl-libs | 1:3.5.5-4.el10_2 |
| Red Hat:enterprise_linux:10.2 | openssl-libs-debuginfo | 1:3.5.5-4.el10_2 |
| Red Hat:enterprise_linux:10.2 | openssl-perl | 1:3.5.5-4.el10_2 |
| Red Hat:enterprise_linux:9 | openssl | 1:3.5.5-4.el9_8 |
| Red Hat:enterprise_linux:9 | openssl-debuginfo | 1:3.5.5-4.el9_8 |
| Red Hat:enterprise_linux:9 | openssl-debugsource | 1:3.5.5-4.el9_8 |
| Red Hat:enterprise_linux:9 | openssl-devel | 1:3.5.5-4.el9_8 |
| Red Hat:enterprise_linux:9 | openssl-libs | 1:3.5.5-4.el9_8 |
| Red Hat:enterprise_linux:9 | openssl-libs-debuginfo | 1:3.5.5-4.el9_8 |
| Red Hat:enterprise_linux:9 | openssl-perl | 1:3.5.5-4.el9_8 |
| Red Hat:hummingbird:1 | bootupd | 0:0.3.2-1.hum1 |
| Red Hat:hummingbird:1 | chunkah | 0:0.6.0-3.hum1 |
| Red Hat:hummingbird:1 | openssl | 0:3.5.8-0.1.hum1 |
| Red Hat:hummingbird:1 | openssl-config-fips | 0:3.5.8-0.1.hum1 |
| Red Hat:hummingbird:1 | openssl-devel | 0:3.5.8-0.1.hum1 |
| Red Hat:hummingbird:1 | openssl-devel-engine | 0:3.5.8-0.1.hum1 |
| Red Hat:hummingbird:1 | openssl-fips-provider-upstream | 0:3.5.8-0.1.hum1 |
| Red Hat:hummingbird:1 | openssl-libs | 0:3.5.8-0.1.hum1 |
| Red Hat:hummingbird:1 | openssl-perl | 0:3.5.8-0.1.hum1 |
| Red Hat:hummingbird:1 | openssl3 | 0:3.5.8-0.1.hum1 |
| Red Hat:hummingbird:1 | openssl3-devel | 0:3.5.8-0.1.hum1 |
| Red Hat:hummingbird:1 | openssl3-devel-engine | 0:3.5.8-0.1.hum1 |
| Red Hat:hummingbird:1 | openssl3-libs | 0:3.5.8-0.1.hum1 |
| Red Hat:hummingbird:1 | python-cryptography | 0:50.0.0-1.hum1 |
| Red Hat:hummingbird:1 | python3-cryptography | 0:50.0.0-1.hum1 |
| Red Hat:hummingbird:1 | ruby3.3 | 0:3.3.10-23.6.hum1 |
| Red Hat:hummingbird:1 | ruby3.3-bundled-gems | 0:3.3.10-23.6.hum1 |
| Red Hat:hummingbird:1 | ruby3.3-default-gems | 0:3.3.10-23.6.hum1 |
| Red Hat:hummingbird:1 | ruby3.3-devel | 0:3.3.10-23.6.hum1 |
| Red Hat:hummingbird:1 | ruby3.3-doc | 0:3.3.10-23.6.hum1 |
| Red Hat:hummingbird:1 | ruby3.3-libs | 0:3.3.10-23.6.hum1 |
| Red Hat:hummingbird:1 | ruby3.4 | 0:3.4.10-31.7.hum1 |
| Red Hat:hummingbird:1 | ruby3.4-bundled-gems | 0:3.4.10-31.7.hum1 |
| Red Hat:hummingbird:1 | ruby3.4-default-gems | 0:3.4.10-31.7.hum1 |
| Red Hat:hummingbird:1 | ruby3.4-devel | 0:3.4.10-31.7.hum1 |
| Red Hat:hummingbird:1 | ruby3.4-doc | 0:3.4.10-31.7.hum1 |
| Red Hat:hummingbird:1 | ruby3.4-libs | 0:3.4.10-31.7.hum1 |
| Red Hat:hummingbird:1 | ruby4.0 | 0:4.0.6-37.3.hum1 |
| Red Hat:hummingbird:1 | ruby4.0-bundled-gems | 0:4.0.6-37.3.hum1 |
| Red Hat:hummingbird:1 | ruby4.0-default-gems | 0:4.0.6-37.3.hum1 |
| Red Hat:hummingbird:1 | ruby4.0-devel | 0:4.0.6-37.3.hum1 |
| Red Hat:hummingbird:1 | ruby4.0-doc | 0:4.0.6-37.3.hum1 |
| Red Hat:hummingbird:1 | ruby4.0-libs | 0:4.0.6-37.3.hum1 |
| Red Hat:hummingbird:1 | rubygem3.3-bigdecimal | 0:3.1.5-23.6.hum1 |
| Red Hat:hummingbird:1 | rubygem3.3-bundler | 0:2.5.22-23.6.hum1 |
| Red Hat:hummingbird:1 | rubygem3.3-devel | 0:3.5.22-23.6.hum1 |
| Red Hat:hummingbird:1 | rubygem3.3-io-console | 0:0.7.1-23.6.hum1 |
| Red Hat:hummingbird:1 | rubygem3.3-irb | 0:1.13.1-23.6.hum1 |
| Red Hat:hummingbird:1 | rubygem3.3-json | 0:2.7.2-23.6.hum1 |
| Red Hat:hummingbird:1 | rubygem3.3-minitest | 0:5.20.0-23.6.hum1 |
| Red Hat:hummingbird:1 | rubygem3.3-power_assert | 0:2.0.3-23.6.hum1 |
| Red Hat:hummingbird:1 | rubygem3.3-psych | 0:5.1.2-23.6.hum1 |
| Red Hat:hummingbird:1 | rubygem3.3-racc | 0:1.7.3-23.6.hum1 |
| Red Hat:hummingbird:1 | rubygem3.3-rake | 0:13.1.0-23.6.hum1 |
| Red Hat:hummingbird:1 | rubygem3.3-rbs | 0:3.4.0-23.6.hum1 |
| Red Hat:hummingbird:1 | rubygem3.3-rdoc | 0:6.6.3.1-23.6.hum1 |
| Red Hat:hummingbird:1 | rubygem3.3-rexml | 0:3.4.4-23.6.hum1 |
| Red Hat:hummingbird:1 | rubygem3.3-rss | 0:0.3.1-23.6.hum1 |
| Red Hat:hummingbird:1 | rubygem3.3-rubygems | 0:3.5.22-23.6.hum1 |
| Red Hat:hummingbird:1 | rubygem3.3-test-unit | 0:3.6.1-23.6.hum1 |
| Red Hat:hummingbird:1 | rubygem3.3-typeprof | 0:0.21.9-23.6.hum1 |
| Red Hat:hummingbird:1 | rubygem4.0-bigdecimal | 0:4.0.1-37.3.hum1 |
| Red Hat:hummingbird:1 | rubygem4.0-bundler | 0:4.0.16-37.3.hum1 |
| Red Hat:hummingbird:1 | rubygem4.0-devel | 0:4.0.16-37.3.hum1 |
| Red Hat:hummingbird:1 | rubygem4.0-io-console | 0:0.8.2-37.3.hum1 |
| Red Hat:hummingbird:1 | rubygem4.0-irb | 0:1.16.0-37.3.hum1 |
| Red Hat:hummingbird:1 | rubygem4.0-json | 0:2.18.0-37.3.hum1 |
| Red Hat:hummingbird:1 | rubygem4.0-minitest | 0:6.0.0-37.3.hum1 |
| Red Hat:hummingbird:1 | rubygem4.0-power_assert | 0:3.0.1-37.3.hum1 |
| Red Hat:hummingbird:1 | rubygem4.0-psych | 0:5.3.1-37.3.hum1 |
| Red Hat:hummingbird:1 | rubygem4.0-racc | 0:1.8.1-37.3.hum1 |
| Red Hat:hummingbird:1 | rubygem4.0-rake | 0:13.3.1-37.3.hum1 |
| Red Hat:hummingbird:1 | rubygem4.0-rbs | 0:3.10.0-37.3.hum1 |
| Red Hat:hummingbird:1 | rubygem4.0-rdoc | 0:7.0.4-37.3.hum1 |
| Red Hat:hummingbird:1 | rubygem4.0-rexml | 0:3.4.4-37.3.hum1 |
| Red Hat:hummingbird:1 | rubygem4.0-rss | 0:0.3.2-37.3.hum1 |
| Red Hat:hummingbird:1 | rubygem4.0-rubygems | 0:4.0.16-37.3.hum1 |
| Red Hat:hummingbird:1 | rubygem4.0-test-unit | 0:3.7.5-37.3.hum1 |
| Red Hat:hummingbird:1 | rubygem4.0-typeprof | 0:0.31.1-37.3.hum1 |
| Red Hat:hummingbird:1 | rust-bootupd | 0:0.3.2-1.hum1 |
| Rocky Linux:10 | openssl | 1:3.5.5-4.el10_2 |
| Rocky Linux:9 | openssl | 1:3.5.5-4.el9_8 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | openssl-1_0_0 | 1.0.2p-150000.3.108.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | openssl-1_1 | 1.1.1l-150400.7.96.2 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | openssl-3 | 3.0.8-150400.4.87.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS | openssl-1_0_0 | 1.0.2p-150000.3.108.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS | openssl-1_1 | 1.1.1l-150400.7.96.2 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS | openssl-3 | 3.0.8-150400.4.87.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS | openssl-1_1 | 1.1.1l-150500.17.57.2 |
| SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS | openssl-3 | 3.0.8-150500.5.66.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS | openssl-1_1 | 1.1.1l-150500.17.57.2 |
| SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS | openssl-3 | 3.0.8-150500.5.66.1 |
| SUSE:Linux Enterprise Micro 5.3 | openssl-1_1 | 1.1.1l-150400.7.96.2 |
| SUSE:Linux Enterprise Micro 5.3 | openssl-3 | 3.0.8-150400.4.87.1 |
| SUSE:Linux Enterprise Micro 5.4 | openssl-1_1 | 1.1.1l-150400.7.96.2 |
| SUSE:Linux Enterprise Micro 5.4 | openssl-3 | 3.0.8-150400.4.87.1 |
| SUSE:Linux Enterprise Micro 5.5 | openssl-1_1 | 1.1.1l-150500.17.57.2 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP7 | openssl-1_1 | 1.1.1w-150700.11.22.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP7 | openssl-3 | 3.2.3-150700.5.36.1 |
| SUSE:Linux Enterprise Module for Development Tools 15 SP7 | openssl-1_1 | 1.1.1w-150700.11.22.1 |
| SUSE:Linux Enterprise Module for Legacy 15 SP7 | openssl-1_0_0 | 1.0.2p-150000.3.108.1 |
| SUSE:Linux Enterprise Module for Legacy 15 SP7 | openssl-1_1 | 1.1.1w-150700.11.22.1 |
| SUSE:Linux Enterprise Server 12 SP5-LTSS | openssl-1_0_0 | 1.0.2p-3.109.1 |
| SUSE:Linux Enterprise Server 12 SP5-LTSS | openssl-1_1 | 1.1.1d-2.131.1 |
| SUSE:Linux Enterprise Server 15 SP4-LTSS | openssl-1_0_0 | 1.0.2p-150000.3.108.1 |
| SUSE:Linux Enterprise Server 15 SP4-LTSS | openssl-1_1 | 1.1.1l-150400.7.96.2 |
| SUSE:Linux Enterprise Server 15 SP4-LTSS | openssl-3 | 3.0.8-150400.4.87.1 |
| SUSE:Linux Enterprise Server 15 SP5-LTSS | openssl-1_0_0 | 1.0.2p-150000.3.108.1 |
| SUSE:Linux Enterprise Server 15 SP5-LTSS | openssl-1_1 | 1.1.1l-150500.17.57.2 |
| SUSE:Linux Enterprise Server 15 SP5-LTSS | openssl-3 | 3.0.8-150500.5.66.1 |
| SUSE:Linux Enterprise Server 15 SP6-LTSS | openssl-1_0_0 | 1.0.2p-150000.3.108.1 |
| SUSE:Linux Enterprise Server 15 SP6-LTSS | openssl-1_1 | 1.1.1w-150600.5.32.1 |
| SUSE:Linux Enterprise Server 15 SP6-LTSS | openssl-3 | 3.1.4-150600.5.53.1 |
| SUSE:Linux Enterprise Server 16.0 | openssl-3 | 3.5.0-160000.8.1 |
| SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5 | openssl-1_0_0 | 1.0.2p-3.109.1 |
| SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5 | openssl-1_1 | 1.1.1d-2.131.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP4 | openssl-1_0_0 | 1.0.2p-150000.3.108.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP4 | openssl-1_1 | 1.1.1l-150400.7.96.2 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP4 | openssl-3 | 3.0.8-150400.4.87.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP5 | openssl-1_0_0 | 1.0.2p-150000.3.108.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP5 | openssl-1_1 | 1.1.1l-150500.17.57.2 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP5 | openssl-3 | 3.0.8-150500.5.66.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP6 | openssl-1_0_0 | 1.0.2p-150000.3.108.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP6 | openssl-1_1 | 1.1.1w-150600.5.32.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP6 | openssl-3 | 3.1.4-150600.5.53.1 |
| SUSE:Linux Enterprise Server for SAP applications 16.0 | openssl-3 | 3.5.0-160000.8.1 |
| SUSE:Linux Micro 6.0 | openssl-3 | 3.1.4-14.1 |
| SUSE:Linux Micro 6.1 | openssl-3 | 3.1.4-slfo.1.1_10.1 |
| SUSE:Linux Micro 6.2 | openssl-3 | 3.5.0-160000.8.1 |
| Ubuntu:22.04:LTS | edk2 | no fix |
| Ubuntu:22.04:LTS | openssl | 3.0.2-0ubuntu1.25 |
| Ubuntu:24.04:LTS | edk2 | no fix |
| Ubuntu:24.04:LTS | openssl | 3.0.13-0ubuntu3.11 |
| Ubuntu:25.10 | edk2 | no fix |
| Ubuntu:25.10 | openssl | 3.5.3-1ubuntu3.4 |
| Ubuntu:26.04:LTS | edk2 | no fix |
| Ubuntu:26.04:LTS | edk2-hwe | no fix |
| Ubuntu:26.04:LTS | openssl | 3.5.5-1ubuntu3.2 |
| Ubuntu:26.10 | edk2 | no fix |
| Ubuntu:26.10 | edk2-hwe | no fix |
| Ubuntu:Pro:14.04:LTS | openssl | 1.0.1f-1ubuntu2.27+esm14 |
| Ubuntu:Pro:16.04:LTS | edk2 | no fix |
| Ubuntu:Pro:16.04:LTS | nodejs | no fix |
| Ubuntu:Pro:16.04:LTS | openssl | 1.0.2g-1ubuntu4.20+esm16 |
| Ubuntu:Pro:18.04:LTS | edk2 | no fix |
| Ubuntu:Pro:18.04:LTS | nodejs | no fix |
| Ubuntu:Pro:18.04:LTS | openssl | 1.1.1-1ubuntu2.1~18.04.23+esm9 |
| Ubuntu:Pro:18.04:LTS | openssl1.0 | 1.0.2n-1ubuntu5.13+esm5 |
| Ubuntu:Pro:20.04:LTS | edk2 | no fix |
| Ubuntu:Pro:20.04:LTS | openssl | 1.1.1f-1ubuntu2.24+esm4 |
| Ubuntu:Pro:22.04:LTS | nodejs | no fix |
| Ubuntu:Pro:FIPS-preview:22.04:LTS | openssl | no fix |
| Ubuntu:Pro:FIPS-preview:22.04:LTS | openssl-fips | no fix |
| Ubuntu:Pro:FIPS-updates:16.04:LTS | openssl | no fix |
| Ubuntu:Pro:FIPS-updates:18.04:LTS | openssl | 1.1.1-1ubuntu2.fips.2.1~18.04.23.9 |
| Ubuntu:Pro:FIPS-updates:20.04:LTS | openssl | 1.1.1f-1ubuntu2.fips.24.4 |
| Ubuntu:Pro:FIPS-updates:22.04:LTS | openssl | 3.0.2-0ubuntu1.25+Fips1 |
| Ubuntu:Pro:FIPS-updates:22.04:LTS | openssl-fips | no fix |
| Ubuntu:Pro:FIPS-updates:24.04:LTS | openssl-fips | 3.0.13-0ubuntu3.12+Fips1 |
| Ubuntu:Pro:FIPS:16.04:LTS | openssl | no fix |
| Ubuntu:Pro:FIPS:18.04:LTS | openssl | no fix |
| Ubuntu:Pro:FIPS:20.04:LTS | openssl | no fix |
| Wolfi | libcrypto3 | 3.6.3-r0 |
| Wolfi | openssl | 3.6.3-r0 |
| openSUSE:Leap 16.0 | openssl-3 | 3.5.0-160000.8.1 |
| openSUSE:Tumbleweed | openssl-3 | 3.5.3-6.1 |