Memory Corruption via Uncanceled AIO Requests on Error: libkcapi's one-shot AIO path can return an error before all submitted IOCBs are drained, allowing later kernel writes into caller-owned output buffers.

There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:

  - 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)

  - Memory Corruption via Uncanceled AIO Requests on Error: libkcapi's one-shot AIO path can return an error
    before all submitted IOCBs are drained, allowing later kernel writes into caller-owned output buffers.
    (CVE-2026-71226)

  - A flaw was found in libkcapi. A local attacker can influence an application that uses the Asynchronous
    Input/Output (AIO) interface. By reusing an AIO-enabled handle after a prior completion error, the
    _kcapi_aio_read_all() function can enter a non-terminating wait loop. This can lead to a persistent denial
    of service, making the affected application or thread unresponsive. (CVE-2026-71227)

The remote Fedora 46 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-e3ee465ab3 advisory.

    Automatic update for libkcapi-1.5.1-2.fc46.

    ##### **Changelog**

    ```
    * Thu Aug 20 2026 Ondrej Mosnek <omosnacek@gmail.com> - 1.5.1-2
    - Apply pending upstream patch to fix the auxiliary test
    * Tue Aug 18 2026 Ondrej Mosnek <omosnacek@gmail.com> - 1.5.1-1
    - Update to version 1.5.1 (fedora#2512793)
    - Fix CVE-2026-71225 (fedora#2511445)
    - Fix CVE-2026-71226 (fedora#2511484)
    - Fix CVE-2026-71227 (fedora#2511487)

    ```

    ----

    Automatic update for libkcapi-1.5.1-1.fc46.


Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 45 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-1a1eac3dfb advisory.

    Automatic update for libkcapi-1.5.1-2.fc45.

    ##### **Changelog**

    ```
    * Thu Aug 20 2026 Ondrej Mosnek <omosnacek@gmail.com> - 1.5.1-2
    - Apply pending upstream patch to fix the auxiliary test
    * Tue Aug 18 2026 Ondrej Mosnek <omosnacek@gmail.com> - 1.5.1-1
    - Update to version 1.5.1 (fedora#2512793)
    - Fix CVE-2026-71225 (fedora#2511445)
    - Fix CVE-2026-71226 (fedora#2511484)
    - Fix CVE-2026-71227 (fedora#2511487)

    ```

    ----

    Automatic update for libkcapi-1.5.1-1.fc45.


Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

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

  - Memory Corruption via Uncanceled AIO Requests on Error: libkcapi's one-shot AIO path can return an error     before all submitted IOCBs are drained, allowing later kernel writes into caller-owned output buffers.
    (CVE-2026-71226)

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

ID	Name	Product	Family	Type	Severity
446263	Alpine: multiple libkcapi packages: security update to 1.5.1-r0	Tenable Cloud Security	Alpine Linux Local Security Checks	Local	high
446263	Alpine: multiple libkcapi packages: security update to 1.5.1-r0	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	Local	high
338610	Fedora 46 : libkcapi (2026-e3ee465ab3)	Nessus	Fedora Local Security Checks	Local	high
338381	Fedora 45 : libkcapi (2026-1a1eac3dfb)	Nessus	Fedora Local Security Checks	Local	high
332237	Linux Distros Unpatched Vulnerability : CVE-2026-71226	Nessus	Misc.	Local	high

Detections

Analytics

CVE-2026-71226

high

Tenable Plugins

high

high

high

high

high