> CVE-2026-42766

« BACK_TO_HOME
PUBLISHED
2026-06-09 17:17
MODIFIED
2026-06-09 17:17
EPSS (Prob. Exploit)
1.06%
Top 35.4%
DATA SOURCES:
NVD 🔗 2026-06-09 RED HAT 🔗 2026-06-14 CWE MITRE 🔗 2026-11-01 FIRST EPSS 🔗 2026-11-01 OSV 🔗 2026-11-02 MSRC 🔗 2026-11-02

> DESCRIPTION

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.

> AFFECTED_PRODUCTS

Red Hat - Red Hat Enterprise Linux 10
Version: 3.5.5
Red Hat - Red Hat Enterprise Linux 9
Version: 3.5.5

> WEAKNESSES

CWE-476

> CWE DETAILED DESCRIPTIONS

CWE-476: NULL Pointer Dereference - The product dereferences a pointer that it expects to be valid but is NULL.

> RED HAT SECURITY ADVISORIES

Red Hat Security Advisory: openssl security update
An update for openssl is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (...
Red Hat Security Advisory: openssl security update
An update for openssl is now available for Red Hat Enterprise Linux 10. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System...
Red Hat Security Advisory: Red Hat Update Infrastructure 5.2 security update
The latest release of Red Hat Update Infrastructure. For more details, see the product documentation.
Red Hat Security Advisory: A Subscription Management tool for finding and reporting Red Hat product usage
A Subscription Management tool for finding and reporting Red Hat product usage
Red Hat Security Advisory: Insights proxy Container Image
Initial GA Release of Red Hat Insights proxy
Red Hat Security Advisory: Red Hat Update Infrastructure 5.3 Technology Preview security update
A new set of Red Hat Update Infrastructure container images is now available as a Technology Preview in the Red Hat container registry.
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.20.1
cert-manager Operator for Red Hat OpenShift 1.20.1
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.18.2
cert-manager Operator for Red Hat OpenShift 1.18.2
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.18.2
cert-manager Operator for Red Hat OpenShift 1.18.2
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.18.2
cert-manager Operator for Red Hat OpenShift 1.18.2
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.17.2
cert-manager Operator for Red Hat OpenShift 1.17.2
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.17.2
cert-manager Operator for Red Hat OpenShift 1.17.2
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.17.2
cert-manager Operator for Red Hat OpenShift 1.17.2
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.18.2
cert-manager Operator for Red Hat OpenShift 1.18.2

> RED HAT SEVERITY ASSESSMENT

THREAT SEVERITY
Low

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

Possible NULL Dereference in Password-Based CMS Decryption

AFFECTED PACKAGES:
Unknown / Unknown
47 versions affected

> HISTORIQUE DES MODIFICATIONS

Première apparition
09/06/2026 17:17
Source: NVD
📊 ENRICHISSEMENT 01/07/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-476: NULL Pointer Dereference - The product dereferences a pointer that it expects to be valid but is NULL.
📊 ENRICHISSEMENT 14/06/2026 05:00
REDHAT
Champ modifié: Sévérité Red Hat
Ancienne valeur:
N/A
Nouvelle valeur:
{ "threat_severity": "Low", "severity_scale": null }
📊 ENRICHISSEMENT 14/06/2026 05:00
REDHAT
Champ modifié: Red Hat
Ancienne valeur:
Non
Nouvelle valeur:
Oui
Total des modifications: 3 Dernière mise à jour: 4 months ago

> REFERENCES

https://github.com/openssl/security/commit/056d06c1918fafbb98c1c85a02e4c47cc4e19...
https://github.com/openssl/security/commit/12bc26ffb3a2be728c9b86e1cae277de5b33d...
https://github.com/openssl/security/commit/3ff64913615d648cfbb6a6f1cf5529ae7ea82...
https://github.com/openssl/security/commit/ab52d88cb5374876d59aee3c91f9e4ccce2b7...
https://github.com/openssl/security/commit/da26f368732b83e40e9d356fe61c3d3aaab6d...
https://openssl-library.org/news/secadv/20260609.txt
« BACK_TO_HOME