Improper Isolation or Compartmentalization in the stream cache mechanism for some Intel(R) Processors may allow an authenticated user to potentially enable escalation of privilege via local access.

suse_linux SUSE-SU-2025:03052-1: SUSE SLES12 : Security update for ucode-intel (Important) (SUSE-SU-2025:03052-1)

suse_linux SUSE-SU-2025:03053-1: SUSE SLED15 / SLES15 / openSUSE 15 : Security update for ucode-intel (Important) (SUSE-SU-2025:03053-1)

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 ALAS2-2025-2994 advisory.

    A potential security vulnerability in some Intel(r) Processors may allow information disclosure. Intel is     releasing microcode updates and prescriptive guidance to mitigate this potential vulnerability.

    Info: https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01153.html     (CVE-2024-28956)

    Potential security vulnerabilities in some Intel(r) Processor indirect branch predictors may allow     information disclosure. Intel is releasing microcode updates to mitigate these potential vulnerabilities.

    Advisory: https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01247.html     (CVE-2024-45332)

    Potential security vulnerabilities in some Intel(r) Processors may allow denial of service. Intel is     releasing microcode updates to mitigate these potential vulnerabilities.

    Advisory: https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01244.html     (CVE-2025-20054)

    Potential security vulnerabilities in some Intel(r) Processors may allow denial of service. Intel is     releasing microcode updates to mitigate these potential vulnerabilities.

    Advisory: https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01244.html     (CVE-2025-20103)

    Improper Isolation or Compartmentalization in the stream cache mechanism for some Intel(R) Processors may     allow an authenticated user to potentially enable escalation of privilege via local access.
    (CVE-2025-20109)

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 ALAS2023-2025-1189 advisory.

    A potential security vulnerability in some Intel(r) Processors may allow information disclosure. Intel is     releasing microcode updates and prescriptive guidance to mitigate this potential vulnerability.

    Info: https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01153.html     (CVE-2024-28956)

    Potential security vulnerabilities in some Intel(r) Processor indirect branch predictors may allow     information disclosure. Intel is releasing microcode updates to mitigate these potential vulnerabilities.

    Advisory: https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01247.html     (CVE-2024-45332)

    Potential security vulnerabilities in some Intel(r) Processors may allow denial of service. Intel is     releasing microcode updates to mitigate these potential vulnerabilities.

    Advisory: https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01244.html     (CVE-2025-20054)

    Potential security vulnerabilities in some Intel(r) Processors may allow denial of service. Intel is     releasing microcode updates to mitigate these potential vulnerabilities.

    Advisory: https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01244.html     (CVE-2025-20103)

    Improper Isolation or Compartmentalization in the stream cache mechanism for some Intel(R) Processors may     allow an authenticated user to potentially enable escalation of privilege via local access.
    (CVE-2025-20109)

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 remote SUSE Linux SLES11 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2025:03116-1 advisory.

    - Intel CPU Microcode was updated to the 20250812 release (bsc#1248438)
         - CVE-2025-20109: Improper Isolation or Compartmentalization in the stream cache mechanism for some     Intel Processors may allow an authenticated user to potentially enable escalation of privilege via local     access.
         - CVE-2025-22840: Sequence of processor instructions leads to unexpected behavior for some Intel Xeon     6 Scalable processors may allow an authenticated user to potentially enable escalation of privilege via     local access
         - CVE-2025-22839: Insufficient granularity of access control in the OOB-MSM for some Intel Xeon 6     Scalable processors may allow a privileged user to potentially enable escalation of privilege via adjacent     access.
         - CVE-2025-22889: Improper handling of overlap between protected memory ranges for some Intel Xeon 6     processor with Intel TDX may allow a privileged user to potentially enable escalation of privilege via     local access.
         - CVE-2025-20053: Improper buffer restrictions for some Intel Xeon Processor firmware with SGX     enabled may allow a privileged user to potentially enable escalation of privilege via local access.
         - CVE-2025-26403: Out-of-bounds write in the memory subsystem for some Intel Xeon 6 processors when     using Intel SGX or Intel TDX may allow a privileged user to potentially enable escalation of privilege via     local access.
         - CVE-2025-32086: Improperly implemented security check for standard in the DDRIO configuration for     some Intel Xeon 6 Processors when using Intel SGX or Intel TDX may allow a privileged user to potentially     enable escalation of privilege via local access.
         - Update for functional issues.
         - Updated Platforms:

           | Processor      | Stepping | F-M-S/PI    | Old Ver  | New Ver  | Products            |:---------------|:---------|:------------|:---------|:---------|:---------            | ARL-H          | A1       | 06-c5-02/82 | 00000118 | 00000119 | Core Ultra Processor (Series 2)            | ARL-S/HX (8P)  | B0       | 06-c6-02/82 | 00000118 | 00000119 | Core Ultra Processor (Series 2)            | EMR-SP         | A1       | 06-cf-02/87 | 210002a9 | 210002b3 | Xeon Scalable Gen5            | GNR-AP/SP      | B0       | 06-ad-01/95 | 010003a2 | 010003d0 | Xeon Scalable Gen6            | GNR-AP/SP      | H0       | 06-ad-01/20 | 0a0000d1 | 0a000100 | Xeon Scalable Gen6            | ICL-D          | B0       | 06-6c-01/10 | 010002d0 | 010002e0 | Xeon D-17xx, D-27xx            | ICX-SP         | Dx/M1    | 06-6a-06/87 | 0d000404 | 0d000410 | Xeon Scalable Gen3            | LNL            | B0       | 06-bd-01/80 | 0000011f | 00000123 | Core Ultra 200 V Series Processor            | MTL            | C0       | 06-aa-04/e6 | 00000024 | 00000025 | Core Ultra Processor            | RPL-H/P/PX 6+8 | J0       | 06-ba-02/e0 | 00004128 | 00004129 | Core Gen13            | RPL-U 2+8      | Q0       | 06-ba-03/e0 | 00004128 | 00004129 | Core Gen13            | SPR-HBM        | Bx       | 06-8f-08/10 | 2c0003f7 | 2c000401 | Xeon Max            | SPR-SP         | E4/S2    | 06-8f-07/87 | 2b000639 | 2b000643 | Xeon Scalable Gen4            | SPR-SP         | E5/S3    | 06-8f-08/87 | 2b000639 | 2b000643 | Xeon Scalable Gen4            | SRF-SP         | C0       | 06-af-03/01 | 03000341 | 03000362 | Xeon 6700-Series Processors with     E-Cores

      New Disclosures Updated in Prior Releases:
      All ADL, RPL, SPR, EMR, MTL, ARL Microcode patches previously released in May 2025.

Tenable has extracted the preceding description block directly from the SUSE 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.

  - Improper Isolation or Compartmentalization in the stream cache mechanism for some Intel(R) Processors may     allow an authenticated user to potentially enable escalation of privilege via local access.
    (CVE-2025-20109)

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
265069	Amazon Linux 2 : microcode_ctl, --advisory ALAS2-2025-2994 (ALAS-2025-2994)	Nessus	Amazon Linux Local Security Checks	high
264839	Amazon Linux 2023 : microcode_ctl (ALAS2023-2025-1189)	Nessus	Amazon Linux Local Security Checks	high
264435	SUSE SLES11 Security Update : microcode_ctl (SUSE-SU-2025:03116-1)	Nessus	SuSE Local Security Checks	high
259911	Linux Distros Unpatched Vulnerability : CVE-2025-20109	Nessus	Misc.	high

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