Red Hat Enterprise Linux libkcapi missing encryption

Summaryinfo

A vulnerability marked as problematic has been reported in Red Hat Enterprise Linux. Affected is an unknown function of the component libkcapi. Performing a manipulation results in missing encryption. This vulnerability is reported as CVE-2026-71225. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Red Hat Enterprise Linux (the affected version is unknown). It has been classified as problematic. This affects an unknown code of the component libkcapi. The manipulation with an unknown input leads to a missing encryption vulnerability. CWE is classifying the issue as CWE-311. The product does not encrypt sensitive or critical information before storage or transmission. This is going to have an impact on confidentiality. The summary by CVE is:

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.

It is possible to read the advisory at access.redhat.com. This vulnerability is uniquely identified as CVE-2026-71225 since 08/05/2026. The exploitability is told to be difficult. It is possible to initiate the attack remotely. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/05/2026). The attack technique deployed by this issue is T1600 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Operating System

Vendor

• Red Hat

Name

• Enterprise Linux

License

• commercial

Website

• Vendor: https://www.redhat.com/

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