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Fencer Vulns
high 7.5

CVE-2026-28390 json

Possible NULL Dereference When Processing CMS KeyTransportRecipientInfo

published 2026-04-07 7 mo ago modified 2026-10-15 25 d ago also EUVD-2026-19966 , JLSEC-2026-275

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 57%
public exploits
0
none known

Summary

Issue summary: During processing of a crafted CMS EnvelopedData message with KeyTransportRecipientInfo a NULL pointer dereference can happen.

Impact summary: Applications that process attacker-controlled CMS data may crash before authentication or cryptographic operations occur resulting in Denial of Service.

When a CMS EnvelopedData message that uses KeyTransportRecipientInfo with RSA-OAEP encryption is processed, the optional parameters field of RSA-OAEP SourceFunc algorithm identifier is examined without checking for its presence. This results in a NULL pointer dereference if the field is missing.

Applications and services that call CMS_decrypt() on untrusted input (e.g., S/MIME processing or CMS-based protocols) are vulnerable.

The FIPS modules in 3.6, 3.5, 3.4, 3.3 and 3.0 are not affected by this issue, as the affected code is outside the OpenSSL FIPS module boundary.

Patch / fix

  • julia AppBundler 1.0.1
  • julia OpenSSL_jll 3.0.20+0, 3.5.6+0
  • OpenSSL OpenSSL 1.0.2zp, 1.1.1zg, 3.0.20, 3.3.7, 3.4.5, 3.5.6, 3.6.2
  • Siemens SIMATIC CN 4100 V5.0
  • openssl Debian 12 3.0.19-1~deb12u2
  • openssl Debian 13 3.5.5-1~deb13u2
  • openssl Debian 14 3.6.2-1

debian advisories DEBIAN-CVE-2026-28390

  • openssl Ubuntu 22.04 LTS 3.0.2-0ubuntu1.23
  • openssl Ubuntu 24.04 LTS 3.0.13-0ubuntu3.9
  • openssl Ubuntu 25.10 3.5.3-1ubuntu3.3
  • openssl Ubuntu 26.10, Ubuntu 26.04 LTS 3.5.5-1ubuntu3
  • openssl Ubuntu Pro 16.04 LTS 1.0.2g-1ubuntu4.20+esm15
  • openssl Ubuntu Pro FIPS-updates 16.04 LTS 1.0.2g-1ubuntu4.fips.4.20.15
  • openssl Ubuntu Pro 18.04 LTS 1.1.1-1ubuntu2.1~18.04.23+esm8
  • openssl Ubuntu Pro FIPS-updates 18.04 LTS 1.1.1-1ubuntu2.fips.2.1~18.04.23.8

ubuntu advisories UBUNTU-CVE-2026-28390

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • edk2 RHEL 10.2 20251114-5.el10_2.2
  • edk2-ovmf RHEL 10.2 20251114-5.el10_2.2
  • edk2-tools RHEL 10.2 20251114-5.el10_2.2
  • edk2-aarch64 RHEL 10.2 20251114-5.el10_2.2
  • openssl RHEL 8, RHEL 8.8 TUS, RHEL 8.8 E4S +2 more 1:1.1.1k-17.el8_6
  • openssl-libs RHEL 8, RHEL 8.8 TUS, RHEL 8.8 E4S +2 more 1:1.1.1k-17.el8_6
  • openssl-perl RHEL 8, RHEL 8.8 TUS, RHEL 8.8 E4S +2 more 1:1.1.1k-17.el8_6
  • compat-openssl10 RHEL 8 1:1.0.2o-4.el8_10.2

red hat advisories RHSA-2026:84573RHSA-2026:84572RHSA-2026:83617RHSA-2026:71542RHSA-2026:58563RHSA-2026:47096

  • openssl-1_0_0 SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +6 more 1.0.2p-150000.3.111.2
  • openssl-3 Linux Micro 6.1 3.1.4-slfo.1.1_10.1
  • openssl-1_1 SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE Micro 5.4 +3 more 1.1.1l-150400.7.93.1
  • openssl-1_1 SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE Micro 5.5 +2 more 1.1.1l-150500.17.54.1
  • openssl-3 Linux Micro 6.0 3.1.4-13.1
  • openssl-3 SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE Micro 5.4 +3 more 3.0.8-150400.4.84.1
  • openssl-1_1 SLE Module for Legacy 15 SP7, SLE Module for Development Tools 15 SP7, SLE Module for Basesystem 15 SP7 1.1.1w-150700.11.16.1
  • openssl-3 SLE Module for Basesystem 15 SP7 3.2.3-150700.5.31.1

suse advisories SUSE-SU-2026:3443-1SUSE-SU-2026:3272-1SUSE-SU-2026:22132-1SUSE-SU-2026:1605-1SUSE-SU-2026:1577-1SUSE-SU-2026:1562-1

  • openssl-3 openSUSE Leap 16.0 3.5.0-160000.7.1
  • openssl-3 openSUSE Tumbleweed 3.5.3-4.1

opensuse advisories openSUSE-SU-2026:20525-1openSUSE-SU-2026:10533-1

  • edk2-ovmf AlmaLinux 10 20251114-5.el10_2.2
  • edk2-tools AlmaLinux 10 20251114-5.el10_2.2
  • edk2-aarch64 AlmaLinux 10 20251114-5.el10_2.2
  • openssl AlmaLinux 8 1:1.1.1k-17.el8_6
  • openssl-libs AlmaLinux 8 1:1.1.1k-17.el8_6
  • openssl-perl AlmaLinux 8 1:1.1.1k-17.el8_6
  • openssl AlmaLinux 9 1:3.5.5-3.el9_8
  • openssl-libs AlmaLinux 9 1:3.5.5-3.el9_8

almalinux advisories ALSA-2026:39297ALSA-2026:38503ALSA-2026:22312ALSA-2026:22313ALSA-2026:22314ALSA-2026:22315

  • edk2 Rocky Linux 10 20251114-5.el10_2.2
  • openssl Rocky Linux 8 1:1.1.1k-17.el8_10
  • openssl Rocky Linux 10 1:3.5.5-3.el10_2
  • compat-openssl10 Rocky Linux 8 1:1.0.2o-4.el8_10.2
  • openssl Rocky Linux 9 1:3.5.5-3.el9_8
  • compat-openssl11 Rocky Linux 9 1:1.1.1k-5.el9_8.3

rocky linux advisories RLSA-2026:39297RLSA-2026:38503RLSA-2026:22314RLSA-2026:22315RLSA-2026:22312RLSA-2026:22313

  • openssl Alpine 3.21, Alpine 3.20 3.3.7-r0
  • openssl Alpine 3.24, Alpine 3.23, Alpine 3.22 3.5.6-r0

alpine advisories ALPINE-CVE-2026-28390

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • openssl Azure Linux 3.0 3.3.5-5
  • edk2 Azure Linux 3.0 20240524git3e722403cd16-16

azure linux advisories AZL-82070AZL-82208

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-28390 updated cvss 7.5

openssl: OpenSSL: Denial of Service due to NULL pointer dereference in CMS EnvelopedData processing

  • Red Hat Confidential Cluster Operator redhat-user-workloads/cocl-operator-tenant/buildroot, redhat-user-workloads/cocl-operator-tenant/compute-pcrs, redhat-user-workloads/cocl-operator-tenant/registration-server, confidential-clusters-beta/confidential-cluster-operator-bundle, redhat-user-workloads/cocl-operator-tenant/attestation-key-register, redhat-user-workloads/cocl-operator-tenant/confidential-cluster-operator
    affected: workaround, no fix available
  • Red Hat Confidential Compute Attestation redhat-user-workloads/ose-osc-tenant/osc-monitor, redhat-user-workloads/ose-osc-tenant/osc-operator, openshift-sandboxed-containers/osc-operator-bundle, redhat-user-workloads/ose-osc-tenant/trustee/trustee, redhat-user-workloads/ose-osc-tenant/osc-podvm-builder, redhat-user-workloads/ose-osc-tenant/osc-podvm-payload
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Lightspeed Core lightspeed-core/dataverse-exporter-rhel9
    affected: workaround, no fix available
  • Red Hat Migration Toolkit for Applications 8 redhat-user-workloads/ocp-art-tenant/art-images
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Multicluster Engine for Kubernetes multicluster-engine/clusterlifecycle-state-metrics-rhel9
    affected: workaround, no fix available
  • Red Hat OpenShift Lightspeed openshift-lightspeed/crt-nshift-lightspeed-tenant/lightspeed-ocp-rag, openshift-lightspeed/crt-nshift-lightspeed-tenant/lightspeed-to-dataverse-exporter
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Pen Drive Powered by Red Hat Lightspeed redhat-user-workloads/pen-drive-tenant/pen-drive-scanner
    affected: workaround, no fix available
  • Red Hat 3scale API Management Platform 2 3scale-amp21/backend, 3scale-amp22/backend, 3scale-amp2/backend-rhel8
    affected: workaround, no fix planned “Will not fix”
show 24 more
  • Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/klusterlet-addon-controller-rhel9
    affected: workaround, no fix available
  • Red Hat Advanced Cluster Security 4 rhacs-eng/release-fact
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Ansible Automation Platform 2 ansible-automation-platform-26/hub-rhel9, ansible-automation-platform-26/mcp-tools-rhel9, ansible-automation-platform-26/controller-rhel9, ansible-automation-platform-26/de-minimal-rhel9, ansible-automation-platform-26/ee-minimal-rhel9, ansible-automation-platform-26/lightspeed-rhel9, +3 more Red Hat Connectivity Link 1 redhat-user-workloads/api-management-tenant/rhcl-1-3-limitador Red Hat Discovery 2 redhat-user-workloads/discovery-tenant/discovery/discovery-server Red Hat Enterprise Linux 7 ovmf, OVMF, AAVMF Red Hat Enterprise Linux 8 edk2, edk2-ovmf, edk2-aarch64, mingw-openssl, mingw32-openssl, mingw64-openssl, +1 more
    affected: workaround, no fix available
  • Red Hat Enterprise Linux 9 ctdb, edk2, bootc, samba, libldb, edk2-ovmf, +47 more Red Hat Enterprise Linux 10 mesa, bootc, samba, rust-afterburn, clevis-pin-tpm2, shim-unsigned-x64, +1 more
    affected: workaround, no fix available, no fix planned “Will not fix”
  • Red Hat JBoss Core Services openssl
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Offline Knowledge Portal redhat-user-workloads/rhocc-mimir-tenant/mimir/rhokp-core-encrypted Red Hat OpenShift AI (RHOAI) rhoai/odh-ml-pipelines-runtime-generic-rhel9, rhoai/odh-trustyai-garak-lls-provider-dsp-rhel9 Red Hat OpenShift Container Platform 4 conmon-rs, kata-containers, openshift/ose-rhel-coreos-9 Red Hat Trusted Profile Analyzer redhat-user-workloads/trusted-content-tenant/rhtpa-product-0-3-z
    affected: workaround, no fix available
  • Red Hat Cert Manager support for Red Hat OpenShift release 1.17 cert-manager/cert-manager-operator-rhel9 1791788287, cert-manager/jetstack-cert-manager-rhel9 1791371069, cert-manager/cert-manager-operator-bundle 1791970484, cert-manager/jetstack-cert-manager-acmesolver-rhel9 1791371080
    fixed: vendor fix RHSA-2026:82888
  • Red Hat Cert Manager support for Red Hat OpenShift release 1.18 cert-manager/cert-manager-operator-rhel9 1789029076, cert-manager/jetstack-cert-manager-rhel9 1791459711, cert-manager/cert-manager-istio-csr-rhel9 1791459759, cert-manager/cert-manager-operator-bundle 1791966259, cert-manager/jetstack-cert-manager-acmesolver-rhel9 1791459707
    fixed: vendor fix RHSA-2026:82354
  • Red Hat Cert Manager support for Red Hat OpenShift release 1.20 cert-manager/cert-manager-trust-manager-rhel9 1790598593
    fixed: vendor fix RHSA-2026:72502
  • Red Hat Cost Management 4 costmanagement/costmanagement-metrics-rhel9-operator 1780946239
    fixed: vendor fix RHSA-2026:27998
  • Red Hat Ansible Automation Platform 2.6 ansible-automation-platform-26/lightspeed-chatbot-rhel9 1780102732
    fixed: vendor fix RHSA-2026:24866
  • Red Hat Discovery 2 discovery 1778101579, discovery/discovery-ui-rhel9 1782166952, discovery/discovery-server-rhel9 1782159791
    fixed: vendor fix RHSA-2026:14937
  • Red Hat Enterprise Linux AppStream (v. 8) compat-openssl10 1.0.2o-4.el8_10.2
    fixed: vendor fix RHSA-2026:22315
  • Red Hat Enterprise Linux AppStream (v. 9) openssl-perl 3.5.5-3.el9_8, compat-openssl11 1.1.1k-5.el9_8.3
    fixed: vendor fix RHSA-2026:22313
  • Red Hat Enterprise Linux AppStream (v. 10) edk2 20251114-5.el10_2.2, openssl-perl 3.5.5-3.el10_2, edk2-ovmf 20251114-5.el10_2.2, edk2-aarch64 20251114-5.el10_2.2
    fixed: vendor fix RHSA-2026:39297
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) compat-openssl10 1.0.2o-3.el8_4.1
    fixed: vendor fix RHSA-2026:47096
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) compat-openssl10 1.0.2o-4.el8_6.1
    fixed: vendor fix RHSA-2026:44480
  • Red Hat Enterprise Linux AppStream E4S (v.8.8) compat-openssl10 1.0.2o-4.el8_8.1
    fixed: vendor fix RHSA-2026:36217
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) compat-openssl11 1.1.1k-4.el9_2.2
    fixed: vendor fix RHSA-2026:39012
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) compat-openssl11 1.1.1k-5.el9_4.3
    fixed: vendor fix RHSA-2026:39009
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) openssl-perl 3.2.2-16.el10_0.7
    fixed: vendor fix RHSA-2026:71542
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) openssl-perl 3.2.2-7.el9_6.4, compat-openssl11 1.1.1k-5.el9_6.3
    fixed: vendor fix RHSA-2026:35869
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) compat-openssl10 1.0.2o-3.el8_4.1
    fixed: vendor fix RHSA-2026:47096
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) compat-openssl10 1.0.2o-4.el8_6.1
    fixed: vendor fix RHSA-2026:44480

25 more fixed, 42 more not affected in the full advisory

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

cisa ICSA-24-102-01 updated cvss 7.5

Siemens SIMATIC S7-1500 TM MFP

  • Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
    affected: mitigation, no fix available

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
6 mo ago

Exploit prediction

0.84% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
julia AppBundler
>=1.0.0, <1.0.1
1.0.1
julia OpenSSL_jll
<3.0.20+0
>=3.5.0+0, <3.5.6+0
3.0.20+0
3.5.6+0
julia Openresty_jll
all versions
 no fix listed

Affected products

  • OpenSSL OpenSSL
  • Siemens SIMATIC CN 4100
  • Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.