RHSA-2026:22312
Vulnerability from csaf_opensuse - Published: 2026-06-01 14:27 - Updated: 2026-09-29 00:22Summary
Red Hat Security Advisory: openssl security update
Severity
Moderate
Notes
Topic: 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 Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library.
Security Fix(es):
* openssl: OpenSSL: Denial of Service due to NULL pointer dereference in CMS EnvelopedData processing (CVE-2026-28390)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
A key group selection preference flaw has been discovered in OpenSSL. An OpenSSL TLS 1.3 server may fail to negotiate the expected preferred key exchange group when its key exchange group configuration includes the default by using the "DEFAULT" keyword. A less preferred key exchange may be used even when a more preferred group is supported by both client and server, if the group was not included among the client's initial predicated keyshares. This will sometimes be the case with the new hybrid post-quantum groups, if the client chooses to defer their use until specifically requested by the server. No OpenSSL FIPS modules are affected by this issue, the code in question lies outside the FIPS boundary.
6.5 (Medium)
Affected products
Fixed
49 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:openssl-debuginfo-1:3.5.5-3.el9_8.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:openssl-debuginfo-1:3.5.5-3.el9_8.i686 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:openssl-debuginfo-1:3.5.5-3.el9_8.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:openssl-debuginfo-1:3.5.5-3.el9_8.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:openssl-debuginfo-1:3.5.5-3.el9_8.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:openssl-debugsource-1:3.5.5-3.el9_8.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:openssl-debugsource-1:3.5.5-3.el9_8.i686 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:openssl-debugsource-1:3.5.5-3.el9_8.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:openssl-debugsource-1:3.5.5-3.el9_8.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:openssl-debugsource-1:3.5.5-3.el9_8.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:openssl-devel-1:3.5.5-3.el9_8.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:openssl-devel-1:3.5.5-3.el9_8.i686 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:openssl-devel-1:3.5.5-3.el9_8.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:openssl-devel-1:3.5.5-3.el9_8.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:openssl-devel-1:3.5.5-3.el9_8.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:openssl-libs-debuginfo-1:3.5.5-3.el9_8.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:openssl-libs-debuginfo-1:3.5.5-3.el9_8.i686 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:openssl-libs-debuginfo-1:3.5.5-3.el9_8.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:openssl-libs-debuginfo-1:3.5.5-3.el9_8.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:openssl-libs-debuginfo-1:3.5.5-3.el9_8.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:openssl-perl-1:3.5.5-3.el9_8.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:openssl-perl-1:3.5.5-3.el9_8.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:openssl-perl-1:3.5.5-3.el9_8.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:openssl-perl-1:3.5.5-3.el9_8.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.8.0.Z.MAIN.EUS:openssl-1:3.5.5-3.el9_8.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.8.0.Z.MAIN.EUS:openssl-1:3.5.5-3.el9_8.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.8.0.Z.MAIN.EUS:openssl-1:3.5.5-3.el9_8.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.8.0.Z.MAIN.EUS:openssl-1:3.5.5-3.el9_8.src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.8.0.Z.MAIN.EUS:openssl-1:3.5.5-3.el9_8.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.8.0.Z.MAIN.EUS:openssl-debuginfo-1:3.5.5-3.el9_8.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.8.0.Z.MAIN.EUS:openssl-debuginfo-1:3.5.5-3.el9_8.i686 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.8.0.Z.MAIN.EUS:openssl-debuginfo-1:3.5.5-3.el9_8.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.8.0.Z.MAIN.EUS:openssl-debuginfo-1:3.5.5-3.el9_8.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.8.0.Z.MAIN.EUS:openssl-debuginfo-1:3.5.5-3.el9_8.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.8.0.Z.MAIN.EUS:openssl-debugsource-1:3.5.5-3.el9_8.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.8.0.Z.MAIN.EUS:openssl-debugsource-1:3.5.5-3.el9_8.i686 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.8.0.Z.MAIN.EUS:openssl-debugsource-1:3.5.5-3.el9_8.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.8.0.Z.MAIN.EUS:openssl-debugsource-1:3.5.5-3.el9_8.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.8.0.Z.MAIN.EUS:openssl-debugsource-1:3.5.5-3.el9_8.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.8.0.Z.MAIN.EUS:openssl-libs-1:3.5.5-3.el9_8.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.8.0.Z.MAIN.EUS:openssl-libs-1:3.5.5-3.el9_8.i686 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.8.0.Z.MAIN.EUS:openssl-libs-1:3.5.5-3.el9_8.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.8.0.Z.MAIN.EUS:openssl-libs-1:3.5.5-3.el9_8.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.8.0.Z.MAIN.EUS:openssl-libs-1:3.5.5-3.el9_8.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.8.0.Z.MAIN.EUS:openssl-libs-debuginfo-1:3.5.5-3.el9_8.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.8.0.Z.MAIN.EUS:openssl-libs-debuginfo-1:3.5.5-3.el9_8.i686 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.8.0.Z.MAIN.EUS:openssl-libs-debuginfo-1:3.5.5-3.el9_8.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.8.0.Z.MAIN.EUS:openssl-libs-debuginfo-1:3.5.5-3.el9_8.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.8.0.Z.MAIN.EUS:openssl-libs-debuginfo-1:3.5.5-3.el9_8.x86_64 | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Moderate
A flaw was found in OpenSSL. A remote attacker could exploit this vulnerability by sending a specially crafted Cryptographic Message Syntax (CMS) EnvelopedData message. During the processing of a KeyTransportRecipientInfo with RSA-OAEP encryption, the system attempts to access an optional parameter field without first verifying its presence. This leads to a NULL pointer dereference, which can cause applications processing the attacker-controlled CMS data to crash, resulting in a Denial of Service (DoS).
7.5 (High)
Affected products
Fixed
49 products, the same list as for
CVE-2026-2673
Threats
Impact
Moderate
References
21 references
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"title": "openssl: OpenSSL TLS 1.3 server may choose unexpected key agreement group"
},
{
"cve": "CVE-2026-28390",
"cwe": {
"id": "CWE-476",
"name": "NULL Pointer Dereference"
},
"discovery_date": "2026-04-07T23:01:18.313921+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2456314"
}
],
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{
"category": "description",
"text": "A flaw was found in OpenSSL. A remote attacker could exploit this vulnerability by sending a specially crafted Cryptographic Message Syntax (CMS) EnvelopedData message. During the processing of a KeyTransportRecipientInfo with RSA-OAEP encryption, the system attempts to access an optional parameter field without first verifying its presence. This leads to a NULL pointer dereference, which can cause applications processing the attacker-controlled CMS data to crash, resulting in a Denial of Service (DoS).",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "openssl: OpenSSL: Denial of Service due to NULL pointer dereference in CMS EnvelopedData processing",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This CVE has been rated as moderate by redhat because the vulnerability is limited to a denial-of-service condition caused by a NULL pointer dereference in OpenSSL CMS processing, without evidence of memory corruption or code execution, furthermore the Affected functionality is niche. The vulnerable path requires:\nCMS/S/MIME processing,\nspecifically CMS_decrypt(),\nwith RSA-OAEP KeyTransportRecipientInfo.\nMany OpenSSL consumers never use CMS APIs, never process S/MIME,\nor do not decrypt attacker-controlled CMS objects.\nSo exposure is far narrower than a generic TLS parsing vulnerability.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-28390"
},
{
"category": "external",
"summary": "RHBZ#2456314",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2456314"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-28390",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-28390"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-28390",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-28390"
},
{
"category": "external",
"summary": "https://github.com/openssl/openssl/commit/01194a8f1941115cd0383bfa91c736dd3993c8bc",
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{
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{
"category": "external",
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"url": "https://github.com/openssl/openssl/commit/af2a5fecd3e71a29e7568f9c1453dec5cebbaff4"
},
{
"category": "external",
"summary": "https://github.com/openssl/openssl/commit/ea7b4ea4f9f853521ba34830cbcadc970d2e0788",
"url": "https://github.com/openssl/openssl/commit/ea7b4ea4f9f853521ba34830cbcadc970d2e0788"
},
{
"category": "external",
"summary": "https://github.com/openssl/openssl/commit/fd2f1a6cf53b9ceeca723a001aa4b825d7c7ee75",
"url": "https://github.com/openssl/openssl/commit/fd2f1a6cf53b9ceeca723a001aa4b825d7c7ee75"
},
{
"category": "external",
"summary": "https://openssl-library.org/news/secadv/20260407.txt",
"url": "https://openssl-library.org/news/secadv/20260407.txt"
}
],
"release_date": "2026-04-07T22:00:54.172000+00:00",
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{
"category": "vendor_fix",
"date": "2026-06-01T14:27:49+00:00",
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"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
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"BaseOS-9.8.0.Z.MAIN.EUS:openssl-debugsource-1:3.5.5-3.el9_8.x86_64",
"BaseOS-9.8.0.Z.MAIN.EUS:openssl-libs-1:3.5.5-3.el9_8.aarch64",
"BaseOS-9.8.0.Z.MAIN.EUS:openssl-libs-1:3.5.5-3.el9_8.i686",
"BaseOS-9.8.0.Z.MAIN.EUS:openssl-libs-1:3.5.5-3.el9_8.ppc64le",
"BaseOS-9.8.0.Z.MAIN.EUS:openssl-libs-1:3.5.5-3.el9_8.s390x",
"BaseOS-9.8.0.Z.MAIN.EUS:openssl-libs-1:3.5.5-3.el9_8.x86_64",
"BaseOS-9.8.0.Z.MAIN.EUS:openssl-libs-debuginfo-1:3.5.5-3.el9_8.aarch64",
"BaseOS-9.8.0.Z.MAIN.EUS:openssl-libs-debuginfo-1:3.5.5-3.el9_8.i686",
"BaseOS-9.8.0.Z.MAIN.EUS:openssl-libs-debuginfo-1:3.5.5-3.el9_8.ppc64le",
"BaseOS-9.8.0.Z.MAIN.EUS:openssl-libs-debuginfo-1:3.5.5-3.el9_8.s390x",
"BaseOS-9.8.0.Z.MAIN.EUS:openssl-libs-debuginfo-1:3.5.5-3.el9_8.x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "openssl: OpenSSL: Denial of Service due to NULL pointer dereference in CMS EnvelopedData processing"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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