RHSA-2026:14217
Vulnerability from csaf_redhat - Published: 2026-05-06 15:56 - Updated: 2026-05-07 09:01Summary
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
Severity
Moderate
Notes
Topic: An update for Red Hat Hardened Images RPMs is now available.
Details: This update includes the following RPMs:
openssl:
* openssl-3.5.6-0.3.hum1 (aarch64, x86_64)
* openssl-config-fips-3.5.6-0.3.hum1 (aarch64, x86_64)
* openssl-devel-3.5.6-0.3.hum1 (aarch64, x86_64)
* openssl-devel-engine-3.5.6-0.3.hum1 (aarch64, x86_64)
* openssl-fips-provider-upstream-3.5.6-0.3.hum1 (aarch64, x86_64)
* openssl-libs-3.5.6-0.3.hum1 (aarch64, x86_64)
* openssl-perl-3.5.6-0.3.hum1 (aarch64, x86_64)
* openssl-3.5.6-0.3.hum1.src (src)
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 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)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://images.redhat.com/
https://access.redhat.com/errata/RHSA-2026:14217
Workaround
Applications that process Cryptographic Message Syntax (CMS) EnvelopedData messages should be configured to only accept input from trusted sources. Restricting network access to services that process untrusted CMS data can also reduce exposure to this Denial of Service vulnerability.
References
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"text": "This update includes the following RPMs:\n\nopenssl:\n * openssl-3.5.6-0.3.hum1 (aarch64, x86_64)\n * openssl-config-fips-3.5.6-0.3.hum1 (aarch64, x86_64)\n * openssl-devel-3.5.6-0.3.hum1 (aarch64, x86_64)\n * openssl-devel-engine-3.5.6-0.3.hum1 (aarch64, x86_64)\n * openssl-fips-provider-upstream-3.5.6-0.3.hum1 (aarch64, x86_64)\n * openssl-libs-3.5.6-0.3.hum1 (aarch64, x86_64)\n * openssl-perl-3.5.6-0.3.hum1 (aarch64, x86_64)\n * openssl-3.5.6-0.3.hum1.src (src)",
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"title": "Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update",
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"vulnerabilities": [
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"cwe": {
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"name": "NULL Pointer Dereference"
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"discovery_date": "2026-04-07T23:01:18.313921+00:00",
"ids": [
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"notes": [
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"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"
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"text": "openssl: OpenSSL: Denial of Service due to NULL pointer dereference in CMS EnvelopedData processing",
"title": "Vulnerability summary"
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"summary": "https://openssl-library.org/news/secadv/20260407.txt",
"url": "https://openssl-library.org/news/secadv/20260407.txt"
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"release_date": "2026-04-07T22:00:54.172000+00:00",
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"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
"product_ids": [
"Red Hat Hardened Images:openssl-main@aarch64",
"Red Hat Hardened Images:openssl-main@src",
"Red Hat Hardened Images:openssl-main@x86_64"
],
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},
{
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"product_ids": [
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"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"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"
},
"products": [
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"Red Hat Hardened Images:openssl-main@x86_64"
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}
],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "openssl: OpenSSL: Denial of Service due to NULL pointer dereference in CMS EnvelopedData processing"
}
]
}
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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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