CVE-2026-71225

A flaw was found in libkcapi. When performing one-shot symmetric cipher operations on large inputs (over 64 KiB) in stateful modes such as Counter (CTR) or Cipher Block Chaining (CBC), the library improperly reuses the Initialization Vector (IV) for each internal data chunk. A remote attacker could potentially exploit this by making an application that uses libkcapi process specially crafted large inputs. This can lead to a significant weakening of data confidentiality, as the repeated IV use can expose relationships in encrypted plaintext, and may also affect data integrity by causing incorrect cryptographic processing.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/errata/RHSA-2026:56985
https://access.redhat.com/errata/RHSA-2026:67265
https://access.redhat.com/errata/RHSA-2026:67266
https://access.redhat.com/errata/RHSA-2026:67267
https://access.redhat.com/errata/RHSA-2026:69285
https://access.redhat.com/errata/RHSA-2026:87712
https://access.redhat.com/security/cve/CVE-2026-71225	Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2462011	Exploit Issue Tracking Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:redhat:hardened_images:-:::::::*
	cpe:2.3:a:redhat:openshift_container_platform:4.0:::::::*
	cpe:2.3:a:smuellerdd:libkcapi::::::::
	cpe:2.3:o:redhat:enterprise_linux:8.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:9.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:10.0:::::::*

History

22 Oct 2026, 21:17

Type	Values Removed	Values Added
References		() https://access.redhat.com/errata/RHSA-2026:87712 -

21 Sep 2026, 13:17

Type	Values Removed	Values Added
References		() https://access.redhat.com/errata/RHSA-2026:69285 -

Information

Published : 2026-08-05 13:24

Updated : 2026-10-22 21:17

NVD link : CVE-2026-71225

Mitre link : CVE-2026-71225

CVE.ORG link : CVE-2026-71225

JSON object : View

Products Affected

smuellerdd

libkcapi

redhat

openshift_container_platform
enterprise_linux
hardened_images

CWE

CWE-330

Use of Insufficiently Random Values

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