Insufficient control flow management in the Alias Checking Trusted Module (ACTM) firmware for some Intel(R) Xeon(R) processors may allow a privileged user to potentially enable escalation of privilege via local access.

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 25.04 / 25.10 host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-7866-1 advisory.

    Barak Gross discovered that some Intel Xeon processors with SGX enabled did not properly handle buffer     restrictions. A local authenticated user could potentially use this issue to escalate their privileges.
    (CVE-2025-20053)

    Avinash Maddy discovered that some Intel processors did not properly isolate or compartmentalize the     stream cache mechanisms. A local authenticated user could potentially use this issue to escalate their     privileges. (CVE-2025-20109)

    Joseph Nuzman discovered that some Intel Xeon processors did not properly manage references to active     allocate resources. A local authenticated user could potentially use this issue to cause a denial of     service (system crash). (CVE-2025-21090)

    It was discovered that some Intel Xeon 6 processors did not properly provide sufficient granularity of     access control in the out of band management service module (OOB-MSM). An authenticated user could     potentially use this issue to escalate their privileges. (CVE-2025-22839)

    It was discovered that some Intel Xeon 6 Scalable processors did not properly handle a specific     sequence of processor instructions, leading to unexpected behavior. A local authenticated user could     potentially use this issue to escalate their privileges. (CVE-2025-22840)

    Joseph Nuzman discovered that some Intel Xeon 6 processors with Intel Trust Domain Extensions     (Intel TDX) did not properly handle overlap between protected memory ranges. A local authenticated user     could potentially use this issue to escalate their privileges. (CVE-2025-22889)

    Avraham Shalev discovered that some Intel Xeon processors did not properly provide sufficient control     flow management in the Alias Checking Trusted Module (ACTM) firmware. A local authenticated user could     potentially use this issue to escalate their privileges. (CVE-2025-24305)

    Aviv Eisen and Avraham Shalev discovered that some Intel Xeon 6 processors when using Intel SGX or     Intel TDX did not properly protect against out-of-bounds writes in the memory subsystem. A local     authenticated user could potentially use this issue to escalate their privileges. (CVE-2025-26403)

    Aviv Eisen and Avraham Shalev discovered that some Intel Xeon 6 processors when using Intel SGX or     Intel TDX did not properly implement security checks in the DDRIO configuration. A local authenticated     user could potentially use this issue to escalate their privileges. (CVE-2025-32086)

Tenable has extracted the preceding description block directly from the Ubuntu 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 Debian 11 host has a package installed that is affected by multiple vulnerabilities as referenced in the dla-4347 advisory.

    -------------------------------------------------------------------------     Debian LTS Advisory DLA-4347-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                         Tobias Frost     October 25, 2025                              https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : intel-microcode     Version        : 3.20250812.1~deb11u1     CVE ID         : CVE-2025-20053 CVE-2025-20109 CVE-2025-21090 CVE-2025-22839                      CVE-2025-22840 CVE-2025-22889 CVE-2025-24305 CVE-2025-26403                      CVE-2025-32086     Debian Bug     : 1110983 1112168

    This update ships updated CPU microcode for some types of Intel CPUs and     provides mitigations for security vulnerabilities which could result in     privilege escalation or denial of service.

    For Debian 11 bullseye, these problems have been fixed in version     3.20250812.1~deb11u1.

    We recommend that you upgrade your intel-microcode packages.

    For the detailed security status of intel-microcode please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/intel-microcode

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS     Attachment:
    signature.asc     Description: PGP signature

Tenable has extracted the preceding description block directly from the Debian 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 Debian 12 / 13 host has a package installed that is affected by multiple vulnerabilities as referenced in the dsa-6030 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6030-1                   security@debian.org     https://www.debian.org/security/                     Salvatore Bonaccorso     October 22, 2025                      https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : intel-microcode     CVE ID         : CVE-2025-20053 CVE-2025-20109 CVE-2025-21090 CVE-2025-22839                      CVE-2025-22840 CVE-2025-22889 CVE-2025-24305 CVE-2025-26403                      CVE-2025-32086     Debian Bug     : 1110983

    This update ships updated CPU microcode for some types of Intel CPUs and     provides mitigations for security vulnerabilities which could result in     privilege escalation or denial of service.

    For the oldstable distribution (bookworm), these problems have been fixed     in version 3.20250812.1~deb12u1.

    For the stable distribution (trixie), these problems have been fixed in     version 3.20250812.1~deb13u1.

    We recommend that you upgrade your intel-microcode packages.

    For the detailed security status of intel-microcode please refer to its     security tracker page at:
    https://security-tracker.debian.org/tracker/intel-microcode

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian 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 version of microcode_ctl installed on the remote host is prior to 2.1-47. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2025-2993 advisory.

    Improper buffer restrictions for some Intel(R) Xeon(R) Processor firmware with SGX enabled may allow a     privileged user to potentially enable escalation of privilege via local access. (CVE-2025-20053)

    Missing reference to active allocated resource for some Intel(R) Xeon(R) processors may allow an     authenticated user to potentially enable denial of service via local access. (CVE-2025-21090)

    Insufficient control flow management in the Alias Checking Trusted Module (ACTM) firmware for some     Intel(R) Xeon(R) processors may allow a privileged user to potentially enable escalation of privilege via     local access. (CVE-2025-24305)

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

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

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2025-1190 advisory.

    Improper buffer restrictions for some Intel(R) Xeon(R) Processor firmware with SGX enabled may allow a     privileged user to potentially enable escalation of privilege via local access. (CVE-2025-20053)

    Missing reference to active allocated resource for some Intel(R) Xeon(R) processors may allow an     authenticated user to potentially enable denial of service via local access. (CVE-2025-21090)

    Insufficient control flow management in the Alias Checking Trusted Module (ACTM) firmware for some     Intel(R) Xeon(R) processors may allow a privileged user to potentially enable escalation of privilege via     local access. (CVE-2025-24305)

Tenable has extracted the preceding description block directly from the tested product 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.

  - Insufficient control flow management in the Alias Checking Trusted Module (ACTM) firmware for some     Intel(R) Xeon(R) processors may allow a privileged user to potentially enable escalation of privilege via     local access. (CVE-2025-24305)

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

ID	Name	Product	Family	Severity
274751	Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 25.04 / 25.10 : Intel Microcode vulnerabilities (USN-7866-1)	Nessus	Ubuntu Local Security Checks	high
271445	Debian dla-4347 : intel-microcode - security update	Nessus	Debian Local Security Checks	high
271205	Debian dsa-6030 : intel-microcode - security update	Nessus	Debian Local Security Checks	high
265067	Amazon Linux 2 : microcode_ctl, --advisory ALAS2-2025-2993 (ALAS-2025-2993)	Nessus	Amazon Linux Local Security Checks	high
264838	Amazon Linux 2023 : microcode_ctl (ALAS2023-2025-1190)	Nessus	Amazon Linux Local Security Checks	high
260033	Linux Distros Unpatched Vulnerability : CVE-2025-24305	Nessus	Misc.	high

Detections

Analytics

CVE-2025-24305

high

Tenable Plugins

high

high

high

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high

high