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Fencer Intel
high 7.5

CVE-2026-63076 json

Invalid Pointer Dereference in CMP Server via Crafted protectionAlg

published 2mo ago modified last mo. also EUVD-2026-65487

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.6%
EPSS 1.6% chance of exploitation in 30 days, percentile 75%
public exploits
0
none known

Summary

Issue summary: OpenSSL CMP password based protection verification only checks whether the protectionAlg parameter was not NULL and not its ASN.1 type, before treating it as a PBMParameter. A crafted message can contain a parameter of a different type, which is then dereferenced as an invalid pointer.

Impact summary: A remote, unauthenticated attacker can crash an application acting as a CMP server that accepts PBM-protected messages, or a CMP client talking to a malicious or intercepted CMP server, resulting in a Denial of Service.

CWE: CWE-476: NULL Pointer Dereference

Description: When verifying the password-based MAC protection of a CMP message, OpenSSL library reads the protectionAlg algorithm parameter with X509_ALGOR_get0(), which returns both the parameter type and its value pointer. The value is then cast to an ASN1_STRING and treated as the expected PBMParameter after only checking that pointer is not NULL. The parameter type returned by X509_ALGOR_get0() was never consulted.

This happens during protection verification, before any MAC is computed, so no knowledge of the PBM shared secret is required; the only precondition is that PBM verification is reachable. On the server side this is reached from OSSL_CMP_SRV_process_request() for any application that stands up a CMP server accepting PBM-protected messages, and on the client side from CMP response validation against a malicious or on-path (MITM) server. The reliable consequence is a denial of service; there is no memory disclosure, no controlled memory write, and no path to code execution. CMP is a specialized feature that an application must explicitly enable.

FIPS impact: no As the CMP code lives outside the FIPS module boundary, no FIPS modules are affected by this CVE.

Patch / fix

  • OpenSSL OpenSSL 3.0.22, 3.4.7, 3.5.8, 3.6.4, 4.0.2
  • openssl Debian 12 3.0.22-1~deb12u1
  • openssl Debian 13 3.5.7-1~deb13u2
  • openssl Debian 14 3.6.4-1

debian advisories DEBIAN-CVE-2026-63076

  • edk2 Ubuntu 24.04 LTS 2024.02-2ubuntu0.10
  • edk2 Ubuntu 26.04 LTS 2025.11-3ubuntu7.3
  • openssl Ubuntu 22.04 LTS 3.0.2-0ubuntu1.29
  • openssl Ubuntu 24.04 LTS 3.0.13-0ubuntu3.15
  • openssl Ubuntu 26.04 LTS 3.5.5-1ubuntu3.4
  • openssl Ubuntu Pro FIPS-updates 22.04 LTS 3.0.2-0ubuntu1.29+Fips1
  • openssl-fips Ubuntu Pro FIPS-updates 24.04 LTS 3.0.13-0ubuntu3.15+Fips1

ubuntu advisories UBUNTU-CVE-2026-63076

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

  • openssl RHEL 9 1:3.5.8-1.el9_8
  • openssl-libs RHEL 9 1:3.5.8-1.el9_8
  • openssl-perl RHEL 9 1:3.5.8-1.el9_8
  • openssl RHEL 10.2 1:3.5.8-1.el10_2
  • openssl-libs RHEL 10.2 1:3.5.8-1.el10_2
  • openssl-perl RHEL 10.2 1:3.5.8-1.el10_2
  • openssl3 hummingbird 1 3.5.8-0.1.hum1
  • openssl3-libs hummingbird 1 3.5.8-0.1.hum1

red hat advisories RHSA-2026:67165RHSA-2026:67154RHSA-2026:59635RHSA-2026:59641

  • openssl-3-livepatches SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 0.6-160000.1.1
  • openssl-3 SLE Module for Basesystem 15 SP7 3.5.0-150700.5.50.1
  • openssl-3 SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE Micro 5.4 +3 more 3.0.8-150400.4.98.1
  • openssl-3 Linux Micro 6.0 3.1.4-17.1
  • openssl-3 SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 3.5.0-160000.10.1
  • openssl-3-livepatches Linux Micro 6.1 0.6-slfo.1.1_1.1
  • openssl-3 Linux Micro 6.1 3.1.4-slfo.1.1_13.1
  • openssl-3 SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE High Performance Computing 15 SP5-LTSS +1 more 3.0.8-150500.5.75.1

suse advisories SUSE-SU-2026:23788-1SUSE-SU-2026:23794-1SUSE-SU-2026:4040-1SUSE-SU-2026:4039-1SUSE-SU-2026:4038-1SUSE-SU-2026:4032-1

  • openssl-3 openSUSE Leap 16.0 3.5.0-160000.10.1
  • openssl-3 openSUSE Tumbleweed 3.5.3-8.1

opensuse advisories openSUSE-SU-2026:21744-1openSUSE-SU-2026:11623-1

  • openssl AlmaLinux 10 1:3.5.8-1.el10_2.alma.1
  • openssl-libs AlmaLinux 10 1:3.5.8-1.el10_2.alma.1
  • openssl-perl AlmaLinux 10 1:3.5.8-1.el10_2.alma.1
  • openssl AlmaLinux 9 1:3.5.8-1.el9_8
  • openssl-libs AlmaLinux 9 1:3.5.8-1.el9_8
  • openssl-perl AlmaLinux 9 1:3.5.8-1.el9_8

almalinux advisories ALSA-2026:67154ALSA-2026:67165

  • openssl Rocky Linux 9 1:3.5.8-1.el9_8
  • openssl Rocky Linux 10 1:3.5.8-1.el10_2

rocky linux advisories RLSA-2026:67165RLSA-2026:67154

  • openssl Alpine 3.21 3.3.7-r1
  • openssl Alpine 3.24, Alpine 3.23, Alpine 3.22 3.5.8-r0

alpine advisories ALPINE-CVE-2026-63076

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

  • edk2 Azure Linux 3.0 20240524git3e722403cd16-20
  • openssl Azure Linux 3.0 3.3.7-6

azure linux advisories AZL-97887AZL-97941

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

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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-2026-63076 updated cvss 7.5

openssl: invalid pointer dereference in CMP server via crafted protectionAlg

  • Red Hat JBoss Core Services jbcs-httpd24-openssl, jbcs-httpd24-openssl-libs, jbcs-httpd24-openssl-perl, jbcs-openssl-win6-x86_64.zip 3.5.5-SP4 Red Hat JBoss Web Server 6 jws-optional-native-components-win6-x86_64.zip 6.2.4.ER1 Red Hat JBoss Web Server 7 jws-optional-native-components-win6-x86_64.zip 6.2.4.ER1
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Satellite 6 puppet-agent Red Hat Satellite Client openvox-agent
    affected: workaround, no fix available
  • Red Hat Cert Manager support for Red Hat OpenShift release 1.20 cert-manager/cert-manager-operator-rhel9 1790272426, cert-manager/cert-manager-operator-rhel9 1790589855, cert-manager/jetstack-cert-manager-rhel9 1790223279, cert-manager/jetstack-cert-manager-rhel9 1790589912, cert-manager/cert-manager-istio-csr-rhel9 1790223719, cert-manager/cert-manager-istio-csr-rhel9 1790589914, +1 more
    fixed: vendor fix RHSA-2026:72475
  • Red Hat Cost Management 4 costmanagement/costmanagement-metrics-rhel9-operator 1790844333
    fixed: vendor fix RHSA-2026:81201
  • Red Hat Cost Management On-Premise 1 costmanagement/costmanagement-ui-rhel10 1791460851
    fixed: vendor fix RHSA-2026:79357
  • Red Hat Developer Hub 1.10 rhdh/rhdh-hub-rhel9 1791311495
    fixed: vendor fix RHSA-2026:79088
  • Red Hat Enterprise Linux AppStream (v. 9) openssl-perl 3.5.8-1.el9_8
    fixed: vendor fix RHSA-2026:67165
  • Red Hat Enterprise Linux AppStream (v. 10) openssl-perl 3.5.8-1.el10_2
    fixed: vendor fix RHSA-2026:67154
show 12 more
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) openssl-debuginfo 3.0.7-29.el9_4.4, openssl-debugsource 3.0.7-29.el9_4.4, openssl-libs-debuginfo 3.0.7-29.el9_4.4
    fixed: vendor fix RHSA-2026:96216
  • Red Hat Enterprise Linux BaseOS (v. 9) openssl 3.5.8-1.el9_8, openssl-libs 3.5.8-1.el9_8
    fixed: vendor fix RHSA-2026:67165
  • Red Hat Enterprise Linux BaseOS (v. 10) openssl 3.5.8-1.el10_2, openssl-libs 3.5.8-1.el10_2
    fixed: vendor fix RHSA-2026:67154
  • Red Hat Enterprise Linux BaseOS E4S (v.9.4) openssl 3.0.7-29.el9_4.4, openssl-libs 3.0.7-29.el9_4.4
    fixed: vendor fix RHSA-2026:96216
  • Red Hat Hardened Images openssl 3.5.8-0.1.hum1, openssl3 3.5.8-0.1.hum1, openssl-libs 3.5.8-0.1.hum1, openssl-perl 3.5.8-0.1.hum1, openssl3-libs 3.5.8-0.1.hum1, openssl-config-fips 3.5.8-0.1.hum1, +3 more
    fixed: vendor fix RHSA-2026:59641
  • Red Hat OpenShift Container Platform 4.22 rhcos 4.22.9.8.202611032353
    fixed: vendor fix RHSA-2026:95346
  • Red Hat OpenShift Container Platform 5.0 rhcos 5.0.9.8.202611022248, rhcos 5.0.10.2.202611022203
    fixed: vendor fix RHSA-2026:94537
  • Red Hat Satellite 6.16 for RHEL 8 openvox-agent 8.31.1-1.el8sat Red Hat Satellite 6.16 for RHEL 9 openvox-agent 8.31.1-1.el9sat
    fixed: vendor fix RHSA-2026:92858
  • Red Hat Satellite 6.17 for RHEL 9 openvox-agent 8.31.1-1.el9sat
    fixed: vendor fix RHSA-2026:92859
  • Red Hat Satellite 6.18 for RHEL 9 openvox-agent 8.31.1-1.el9sat
    fixed: vendor fix RHSA-2026:92860
  • Red Hat Update Infrastructure 5 rhui5/cds-rhel9 1790241954, rhui5/rhua-rhel9 1790242004, rhui5/haproxy-rhel9 1790241900, rhui5/installer-rhel9 1789482961, rhui5/cds-kubernetes-rhel9 1789479916
    fixed: vendor fix RHSA-2026:67956
  • Red Hat Cert Manager support for Red Hat OpenShift release 1.20 cert-manager/jetstack-cert-manager-acmesolver-rhel9 1790223630 Red Hat Cost Management 4 costmanagement/costmanagement-metrics-operator-bundle 1790851152 Red Hat Developer Hub 1.10 rhdh/rhdh-rhel9-operator 1791219676, rhdh/rhdh-operator-bundle 1791315788, rhdh/rhdh-must-gather-rhel9 1788278523, rhdh/rhdh-rag-content-rhel9 1791168570 Red Hat Enterprise Linux 6 openssl, openssl-perl Red Hat Enterprise Linux 7 ovmf, OVMF, shim, AAVMF, mokutil, openssl, +5 more Red Hat Enterprise Linux 8 edk2, shim, openssl, shim-x64, edk2-ovmf, shim-aa64, +10 more
    +11 more products
    Red Hat Enterprise Linux 9 edk2, shim, shim-x64, edk2-ovmf, shim-aa64, edk2-tools, +4 more Red Hat Enterprise Linux 10 edk2, shim, shim-unsigned-x64, shim-unsigned-aarch64 Red Hat Enterprise Linux AppStream E4S (v.9.4) openssl-perl 3.0.7-29.el9_4.4 Red Hat Hardened Images unbound Red Hat OpenShift AI (RHOAI) rhoai/odh-llama-stack-k8s-operator-rhel9 Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8 Red Hat Satellite 6.16 for RHEL 8 openvox-server 8.17.0-1.el8sat, yggdrasil-worker-forwarder 0.1.1-1.el8sat Red Hat Satellite 6.16 for RHEL 9 openvox-server 8.17.0-1.el9sat, yggdrasil-worker-forwarder 0.1.1-1.el9sat Red Hat Satellite 6.17 for RHEL 9 openvox-server 8.17.0-1.el9sat, yggdrasil-worker-forwarder 0.1.1-1.el9sat Red Hat Satellite 6.18 for RHEL 9 openvox-server 8.17.0-1.el9sat, yggdrasil-worker-forwarder 0.1.1-1.el9sat Red Hat Satellite Client puppet-agent
    not affected: vulnerable code not present

1 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 SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
2mo ago

Exploit prediction

1.60% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-09).

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
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • OpenSSL OpenSSL

Classification

Weakness
Technology feeds

References

Sources

Fencer Intel 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.