CVE-2026-122056

Openscap: one-byte heap buffer overflow in sds-compose may lead to denial-of-service

Published Nov 9, 2026 CVSS 3.1 · 5.9 Medium EPSS < 1% KEV · Not listed
Description
A flaw was found in OpenSCAP. A heap-based buffer overflow can occur when processing a specially crafted Extensible Configuration Checklist Description Format (XCCDF) document using the sds-compose option. An attacker could exploit this vulnerability to corrupt memory, resulting in an application crash and a Denial of Service (DoS).

Remediation

Vendor Workaround

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Openscap
Openscap openscap
Red Hat
Red Hat enterprise Linux
Redhat hardened Images
Vendors & Products Openscap
Openscap openscap
Red Hat
Red Hat enterprise Linux
Redhat hardened Images
Type Values Removed Values Added
Description A flaw was found in OpenSCAP. A heap-based buffer overflow can occur when processing a specially crafted Extensible Configuration Checklist Description Format (XCCDF) document using the sds-compose option. An attacker could exploit this vulnerability to corrupt memory, resulting in an application crash and a Denial of Service (DoS).
Title Openscap: one-byte heap buffer overflow in sds-compose may lead to denial-of-service
First Time appeared Redhat
Redhat enterprise Linux
Redhat hummingbird
Redhat rhel Els
Weaknesses CWE-787
CPEs cpe:/a:redhat:enterprise_linux:10
cpe:/a:redhat:enterprise_linux:8
cpe:/a:redhat:enterprise_linux:9
cpe:/a:redhat:hummingbird:1
cpe:/o:redhat:rhel_els:6
cpe:/o:redhat:rhel_els:7
Vendors & Products Redhat
Redhat enterprise Linux
Redhat hummingbird
Redhat rhel Els
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Nov 13, 2026, 1:11 PM
Reserved
Nov 4, 2026, 4:34 PM
Status
Awaiting Analysis
Published
Nov 9, 2026, 10:18 PM
Modified
Nov 13, 2026, 1:17 PM
Severity
Moderate
Public date
Nov 9, 2026, 7:47 PM