Linux Distros Unpatched Vulnerability : CVE-2026-71225

medium Nessus Plugin ID 332239

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Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

- 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.
(CVE-2026-71225)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

Plugin Details

Severity: Medium

ID: 332239

File Name: unpatched_CVE_2026_71225.nasl

Version: 1.4

Type: Local

Agent: unix

Family: Misc.

Published: 8/5/2026

Updated: 8/13/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.5

Percentile: 51.67

CVSS v2

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 5.5

Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:P/A:N

CVSS Score Source: CVE-2026-71225

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 6.2

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N

Temporal Vector: CVSS:3.0/E:P/RL:U/RC:C

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, cpe:/o:canonical:ubuntu_linux:26.04:-:lts, cpe:/o:centos:centos:8, cpe:/o:debian:debian_linux:11.0, cpe:/o:debian:debian_linux:12.0, cpe:/o:debian:debian_linux:13.0, cpe:/o:debian:debian_linux:14.0, cpe:/o:redhat:enterprise_linux:10, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:canonical:ubuntu_linux:libkcapi, p-cpe:/a:centos:centos:libkcapi-hasher, p-cpe:/a:centos:centos:libkcapi-hmaccalc, p-cpe:/a:centos:centos:libkcapi, p-cpe:/a:debian:debian_linux:libkcapi, p-cpe:/a:redhat:enterprise_linux:libkcapi-hasher, p-cpe:/a:redhat:enterprise_linux:libkcapi-hmaccalc, p-cpe:/a:redhat:enterprise_linux:libkcapi

Required KB Items: Host/local_checks_enabled, Host/cpu, global_settings/vendor_unpatched, Host/OS/identifier

Exploit Available: true

Exploit Ease: Exploits are available

Vulnerability Publication Date: 8/5/2026

Reference Information

CVE: CVE-2026-71225

Detections

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