cve-2026-31789
MEDIUM CVSS 5.8 csaf_redhat
Description
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.
Timeline
- Published
- 2026-04-07 00:00 UTC
- Last Modified
- 2026-09-01
CVSS Details
CVSS details not available.
Affected Products
No product information available.
Weaknesses (CWE)
References
No references available.
Linked Vulnerabilities
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{
"category": "description",
"text": "A flaw was found in OpenSSL. This vulnerability, a heap buffer overflow, affects 32-bit systems when processing an unusually large X.509 certificate. If an application or service attempts to print or log such a specially crafted certificate, it could lead to a system crash or potentially allow an attacker to execute arbitrary code. This issue is considered low severity due to the specific conditions required for exploitation, including the need for an extremely large certificate and a 32-bit operating environment.",
"title": "Vulnerability description"
},
{
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"text": "openssl: OpenSSL: Heap buffer overflow on 32-bit systems from large X.509 certificate processing",
"title": "Vulnerability summary"
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{
"category": "other",
"text": "This issue has a Low impact. The vulnerability affects 32-bit systems and requires an application or service to process an unusually large X.509 certificate (over 1 Gigabyte) by printing or logging its contents. This specific condition makes exploitation unlikely in typical Red Hat environments.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
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"remediations": [
{
"category": "vendor_fix",
"date": "2026-04-09T08:50:10+00:00",
"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"
],
"url": "https://access.redhat.com/errata/RHSA-2026:7261"
},
{
"category": "workaround",
"details": "To mitigate this issue, avoid processing or logging untrusted X.509 certificates, particularly those with unusually large OCTET STRING values. Restricting the source of X.509 certificates to trusted entities can reduce exposure to this vulnerability.",
"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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"red_hat_enterprise_linux_10:edk2-ovmf",
"red_hat_enterprise_linux_10:edk2-tools",
"red_hat_enterprise_linux_10:edk2-tools-doc",
"red_hat_enterprise_linux_10:edk2.src",
"red_hat_enterprise_linux_10:mokutil",
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"red_hat_enterprise_linux_10:openssl-devel",
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"red_hat_enterprise_linux_10:shim-unsigned-x64.src",
"red_hat_enterprise_linux_10:shim-x64",
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"red_hat_enterprise_linux_9:edk2-tools-doc",
"red_hat_enterprise_linux_9:edk2.src",
"red_hat_enterprise_linux_9:openssl",
"red_hat_enterprise_linux_9:openssl-devel",
"red_hat_enterprise_linux_9:openssl-libs",
"red_hat_enterprise_linux_9:openssl-perl",
"red_hat_enterprise_linux_9:openssl.src",
"red_hat_enterprise_linux_9:shim-aa64",
"red_hat_enterprise_linux_9:shim-unsigned-aarch64.src",
"red_hat_enterprise_linux_9:shim-unsigned-x64",
"red_hat_enterprise_linux_9:shim-unsigned-x64.src",
"red_hat_enterprise_linux_9:shim-x64",
"red_hat_enterprise_linux_9:shim.src",
"red_hat_jboss_core_services:openssl",
"red_hat_openshift_container_platform_4:openshift/ose-rhel-coreos-8",
"red_hat_openshift_container_platform_4:openshift/ose-rhel-coreos-9"
]
},
{
"category": "none_available",
"details": "Fix deferred",
"product_ids": [
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"red_hat_enterprise_linux_10:edk2-ovmf",
"red_hat_enterprise_linux_10:edk2-tools",
"red_hat_enterprise_linux_10:edk2-tools-doc",
"red_hat_enterprise_linux_10:edk2.src",
"red_hat_enterprise_linux_10:mokutil",
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"red_hat_enterprise_linux_10:shim-aa64",
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"red_hat_enterprise_linux_10:shim-unsigned-x64.src",
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"red_hat_enterprise_linux_6:openssl-devel",
"red_hat_enterprise_linux_6:openssl-perl",
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"red_hat_enterprise_linux_6:openssl.src",
"red_hat_enterprise_linux_7:AAVMF",
"red_hat_enterprise_linux_7:OVMF",
"red_hat_enterprise_linux_7:openssl",
"red_hat_enterprise_linux_7:openssl-devel",
"red_hat_enterprise_linux_7:openssl-libs",
"red_hat_enterprise_linux_7:openssl-perl",
"red_hat_enterprise_linux_7:openssl-static",
"red_hat_enterprise_linux_7:openssl.src",
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"red_hat_enterprise_linux_8:compat-openssl10",
"red_hat_enterprise_linux_8:compat-openssl10.src",
"red_hat_enterprise_linux_8:edk2-aarch64",
"red_hat_enterprise_linux_8:edk2-ovmf",
"red_hat_enterprise_linux_8:edk2.src",
"red_hat_enterprise_linux_8:mingw-openssl.src",
"red_hat_enterprise_linux_8:mingw32-openssl",
"red_hat_enterprise_linux_8:mingw64-openssl",
"red_hat_enterprise_linux_8:openssl",
"red_hat_enterprise_linux_8:openssl-devel",
"red_hat_enterprise_linux_8:openssl-libs",
"red_hat_enterprise_linux_8:openssl-perl",
"red_hat_enterprise_linux_8:openssl-static",
"red_hat_enterprise_linux_8:openssl.src",
"red_hat_enterprise_linux_8:shim-aa64",
"red_hat_enterprise_linux_8:shim-ia32",
"red_hat_enterprise_linux_8:shim-unsigned-x64",
"red_hat_enterprise_linux_8:shim-unsigned-x64.src",
"red_hat_enterprise_linux_8:shim-x64",
"red_hat_enterprise_linux_8:shim.src",
"red_hat_enterprise_linux_9:compat-openssl11",
"red_hat_enterprise_linux_9:compat-openssl11.src",
"red_hat_enterprise_linux_9:edk2-aarch64",
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"red_hat_enterprise_linux_9:edk2-tools",
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"red_hat_enterprise_linux_9:shim-unsigned-aarch64.src",
"red_hat_enterprise_linux_9:shim-unsigned-x64",
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"red_hat_jboss_core_services:openssl",
"red_hat_openshift_container_platform_4:openshift/ose-rhel-coreos-8",
"red_hat_openshift_container_platform_4:openshift/ose-rhel-coreos-9"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.8,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:H",
"version": "3.1"
},
"products": [
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"Red Hat Hardened Images:openssl-main@src",
"Red Hat Hardened Images:openssl-main@x86_64",
"red_hat_enterprise_linux_10:edk2-aarch64",
"red_hat_enterprise_linux_10:edk2-ovmf",
"red_hat_enterprise_linux_10:edk2-tools",
"red_hat_enterprise_linux_10:edk2-tools-doc",
"red_hat_enterprise_linux_10:edk2.src",
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"red_hat_enterprise_linux_10:shim-unsigned-x64.src",
"red_hat_enterprise_linux_10:shim-x64",
"red_hat_enterprise_linux_6:openssl",
"red_hat_enterprise_linux_6:openssl-devel",
"red_hat_enterprise_linux_6:openssl-perl",
"red_hat_enterprise_linux_6:openssl-static",
"red_hat_enterprise_linux_6:openssl.src",
"red_hat_enterprise_linux_7:AAVMF",
"red_hat_enterprise_linux_7:OVMF",
"red_hat_enterprise_linux_7:openssl",
"red_hat_enterprise_linux_7:openssl-devel",
"red_hat_enterprise_linux_7:openssl-libs",
"red_hat_enterprise_linux_7:openssl-perl",
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"red_hat_enterprise_linux_7:openssl.src",
"red_hat_enterprise_linux_7:ovmf.src",
"red_hat_enterprise_linux_8:compat-openssl10",
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"red_hat_enterprise_linux_8:edk2-aarch64",
"red_hat_enterprise_linux_8:edk2-ovmf",
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"red_hat_enterprise_linux_8:mingw-openssl.src",
"red_hat_enterprise_linux_8:mingw32-openssl",
"red_hat_enterprise_linux_8:mingw64-openssl",
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"red_hat_enterprise_linux_8:openssl-perl",
"red_hat_enterprise_linux_8:openssl-static",
"red_hat_enterprise_linux_8:openssl.src",
"red_hat_enterprise_linux_8:shim-aa64",
"red_hat_enterprise_linux_8:shim-ia32",
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]
}
],
"threats": [
{
"category": "impact",
"details": "Low",
"product_ids": [
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"Red Hat Hardened Images:openssl-main@src",
"Red Hat Hardened Images:openssl-main@x86_64",
"red_hat_enterprise_linux_10:edk2-aarch64",
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"red_hat_enterprise_linux_10:openssl",
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"red_hat_enterprise_linux_10:openssl-perl",
"red_hat_enterprise_linux_10:openssl.src",
"red_hat_enterprise_linux_10:shim-aa64",
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"red_hat_enterprise_linux_10:shim-unsigned-x64.src",
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"red_hat_enterprise_linux_6:openssl-static",
"red_hat_enterprise_linux_6:openssl.src",
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"red_hat_enterprise_linux_7:OVMF",
"red_hat_enterprise_linux_7:openssl",
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"red_hat_enterprise_linux_7:openssl-libs",
"red_hat_enterprise_linux_7:openssl-perl",
"red_hat_enterprise_linux_7:openssl-static",
"red_hat_enterprise_linux_7:openssl.src",
"red_hat_enterprise_linux_7:ovmf.src",
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"red_hat_enterprise_linux_8:edk2-aarch64",
"red_hat_enterprise_linux_8:edk2-ovmf",
"red_hat_enterprise_linux_8:edk2.src",
"red_hat_enterprise_linux_8:mingw-openssl.src",
"red_hat_enterprise_linux_8:mingw32-openssl",
"red_hat_enterprise_linux_8:mingw64-openssl",
"red_hat_enterprise_linux_8:openssl",
"red_hat_enterprise_linux_8:openssl-devel",
"red_hat_enterprise_linux_8:openssl-libs",
"red_hat_enterprise_linux_8:openssl-perl",
"red_hat_enterprise_linux_8:openssl-static",
"red_hat_enterprise_linux_8:openssl.src",
"red_hat_enterprise_linux_8:shim-aa64",
"red_hat_enterprise_linux_8:shim-ia32",
"red_hat_enterprise_linux_8:shim-unsigned-x64",
"red_hat_enterprise_linux_8:shim-unsigned-x64.src",
"red_hat_enterprise_linux_8:shim-x64",
"red_hat_enterprise_linux_8:shim.src",
"red_hat_enterprise_linux_9:compat-openssl11",
"red_hat_enterprise_linux_9:compat-openssl11.src",
"red_hat_enterprise_linux_9:edk2-aarch64",
"red_hat_enterprise_linux_9:edk2-ovmf",
"red_hat_enterprise_linux_9:edk2-tools",
"red_hat_enterprise_linux_9:edk2-tools-doc",
"red_hat_enterprise_linux_9:edk2.src",
"red_hat_enterprise_linux_9:openssl",
"red_hat_enterprise_linux_9:openssl-devel",
"red_hat_enterprise_linux_9:openssl-libs",
"red_hat_enterprise_linux_9:openssl-perl",
"red_hat_enterprise_linux_9:openssl.src",
"red_hat_enterprise_linux_9:shim-aa64",
"red_hat_enterprise_linux_9:shim-unsigned-aarch64.src",
"red_hat_enterprise_linux_9:shim-unsigned-x64",
"red_hat_enterprise_linux_9:shim-unsigned-x64.src",
"red_hat_enterprise_linux_9:shim-x64",
"red_hat_enterprise_linux_9:shim.src",
"red_hat_jboss_core_services:openssl",
"red_hat_openshift_container_platform_4:openshift/ose-rhel-coreos-8",
"red_hat_openshift_container_platform_4:openshift/ose-rhel-coreos-9"
]
}
],
"title": "openssl: OpenSSL: Heap buffer overflow on 32-bit systems from large X.509 certificate processing"
}
]
}