Vulnerability-Lookup

SUSE-SU-2026:3124-1

Vulnerability from csaf_suse - Published: 2026-07-20 07:01 - Updated: 2026-07-20 07:01

Summary

Security update for microcode_ctl

Severity

Moderate

Notes

Title of the patch: Security update for microcode_ctl

Description of the patch: This update for microcode_ctl fixes the following issue: - CVE-2025-35979: shared microarchitectural predictor state in VMX non-root operation could lead to data leaks (bsc#1265189). Changes for microcode_ctl: - Intel CPU Microcode was updated to the 20260512 release (bsc#1265189): * Update for various functional issues. ### New Platforms | Processor | Stepping | F-M-S/PI | Old Ver | New Ver | Products |:---------------|:---------|:------------|:---------|:---------|:--------- | PTL 404 | A1 | 06-cc-03/90 | | 0000011b | Intel Core Ultra Processor (Series 3) | PTL-H 484/12Xe | A0/B0 | 06-cc-02/90 | | 0000011b | Intel Core Ultra Processor (Series 3) ### Updated Platforms | ARL-H | A1 | 06-c5-02/82 | 0000011b | 00000121 | Core Ultra Processor (Series 2) | ARL-S/HX (8P) | B0 | 06-c6-02/82 | 0000011b | 00000121 | Core Ultra Processor (Series 2) | EMR-SP | A1 | 06-cf-02/87 | 210002d3 | 210002e0 | Xeon Scalable Gen5 | GNR-AP/SP | Bx/Hx/Lx | 06-ad-01/95 | 01000405 | 01000423 | Xeon 6900/6700/6500 Series Processors with P-Cores | GNR-D | B0/B1 | 06-ae-01/97 | 01000303 | 01000307 | Xeon 6700P-B/6500P-B Series SoC with P-Cores | GNR-SP R1S | Bx/Hx/Lx | 06-ad-01/20 | 0a000133 | 0a000142 | Xeon 6700/6500-Series Processors with P-Cores | LNL | B0 | 06-bd-01/80 | 00000125 | 00000126 | Core Ultra 200 V Series Processor | SPR-SP | E4/S2 | 06-8f-07/87 | 2b000661 | 2b000670 | Xeon Scalable Gen4 | SPR-SP | E5/S3 | 06-8f-08/87 | 2b000661 | 2b000670 | Xeon Scalable Gen4 | SRF-AP/SP | C0 | 06-af-03/01 | 03000382 | 030003a3 | Xeon 6900/6700-Series Processors with E-Cores - Intel CPU Microcode was updated to the 20260227 release: * Update for functional issues. Refer to Intel Xeon 6700P-B/6500P-B-Series SoC with P-Cores for details. * ### Updated Platforms * | GNR-D | B0/B1 | 06-ae-01/97 | 010002f3 | 01000303 | Xeon 6700P-B/6500P-B Series SoC with P-Cores

Patchnames: SUSE-2026-3124,SUSE-SLE-SERVER-11-SP4-LTSS-EXTREME-CORE-2026-3124

CVE-2025-35979

4.7 (Medium)


                        
                          CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected products

Recommended 1 product

Product	Identifier	Version	Remediation
Unresolved product id: SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:microcode_ctl-1.17-102.83.95.1.x86_64		—	Vendor Fix

Threats

Impact moderate

References

8 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/s…	self
https://www.suse.com/support/update/announcement/…	self
https://lists.suse.com/pipermail/sle-updates/2026…	self
https://bugzilla.suse.com/1265189	self
https://www.suse.com/security/cve/CVE-2025-35979/	self
https://www.suse.com/security/cve/CVE-2025-35979	external
https://bugzilla.suse.com/1265189	external

JSON

To clipboard

{
  "document": {
    "aggregate_severity": {
      "namespace": "https://www.suse.com/support/security/rating/",
      "text": "moderate"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Copyright 2024 SUSE LLC. All rights reserved.",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "summary",
        "text": "Security update for microcode_ctl",
        "title": "Title of the patch"
      },
      {
        "category": "description",
        "text": "This update for microcode_ctl fixes the following issue:\n\n- CVE-2025-35979: shared microarchitectural predictor state in VMX non-root operation could lead to data leaks\n  (bsc#1265189).\n\nChanges for microcode_ctl:\n\n- Intel CPU Microcode was updated to the 20260512 release (bsc#1265189):\n\n * Update for various functional issues.\n ### New Platforms\n | Processor | Stepping | F-M-S/PI | Old Ver | New Ver | Products\n |:---------------|:---------|:------------|:---------|:---------|:---------\n | PTL 404 | A1 | 06-cc-03/90 | | 0000011b | Intel Core Ultra Processor (Series 3)\n | PTL-H 484/12Xe | A0/B0 | 06-cc-02/90 | | 0000011b | Intel Core Ultra Processor (Series 3)\n ### Updated Platforms\n | ARL-H | A1 | 06-c5-02/82 | 0000011b | 00000121 | Core Ultra Processor (Series 2)\n | ARL-S/HX (8P) | B0 | 06-c6-02/82 | 0000011b | 00000121 | Core Ultra Processor (Series 2)\n | EMR-SP | A1 | 06-cf-02/87 | 210002d3 | 210002e0 | Xeon Scalable Gen5\n | GNR-AP/SP | Bx/Hx/Lx | 06-ad-01/95 | 01000405 | 01000423 | Xeon 6900/6700/6500 Series Processors with P-Cores\n | GNR-D | B0/B1 | 06-ae-01/97 | 01000303 | 01000307 | Xeon 6700P-B/6500P-B Series SoC with P-Cores\n | GNR-SP R1S | Bx/Hx/Lx | 06-ad-01/20 | 0a000133 | 0a000142 | Xeon 6700/6500-Series Processors with P-Cores\n | LNL | B0 | 06-bd-01/80 | 00000125 | 00000126 | Core Ultra 200 V Series Processor\n | SPR-SP | E4/S2 | 06-8f-07/87 | 2b000661 | 2b000670 | Xeon Scalable Gen4\n | SPR-SP | E5/S3 | 06-8f-08/87 | 2b000661 | 2b000670 | Xeon Scalable Gen4\n | SRF-AP/SP | C0 | 06-af-03/01 | 03000382 | 030003a3 | Xeon 6900/6700-Series Processors with E-Cores\n  \n- Intel CPU Microcode was updated to the 20260227 release:\n\n * Update for functional issues. Refer to Intel Xeon\n 6700P-B/6500P-B-Series SoC with P-Cores for details.\n * ### Updated Platforms\n * | GNR-D | B0/B1 | 06-ae-01/97 | 010002f3 |\n 01000303 | Xeon 6700P-B/6500P-B Series SoC with P-Cores\n",
        "title": "Description of the patch"
      },
      {
        "category": "details",
        "text": "SUSE-2026-3124,SUSE-SLE-SERVER-11-SP4-LTSS-EXTREME-CORE-2026-3124",
        "title": "Patchnames"
      },
      {
        "category": "legal_disclaimer",
        "text": "CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).",
        "title": "Terms of use"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "https://www.suse.com/support/security/contact/",
      "name": "SUSE Product Security Team",
      "namespace": "https://www.suse.com/"
    },
    "references": [
      {
        "category": "external",
        "summary": "SUSE ratings",
        "url": "https://www.suse.com/support/security/rating/"
      },
      {
        "category": "self",
        "summary": "URL of this CSAF notice",
        "url": "https://ftp.suse.com/pub/projects/security/csaf/suse-su-2026_3124-1.json"
      },
      {
        "category": "self",
        "summary": "URL for SUSE-SU-2026:3124-1",
        "url": "https://www.suse.com/support/update/announcement/2026/suse-su-20263124-1/"
      },
      {
        "category": "self",
        "summary": "E-Mail link for SUSE-SU-2026:3124-1",
        "url": "https://lists.suse.com/pipermail/sle-updates/2026-July/048449.html"
      },
      {
        "category": "self",
        "summary": "SUSE Bug 1265189",
        "url": "https://bugzilla.suse.com/1265189"
      },
      {
        "category": "self",
        "summary": "SUSE CVE CVE-2025-35979 page",
        "url": "https://www.suse.com/security/cve/CVE-2025-35979/"
      }
    ],
    "title": "Security update for microcode_ctl",
    "tracking": {
      "current_release_date": "2026-07-20T07:01:24Z",
      "generator": {
        "date": "2026-07-20T07:01:24Z",
        "engine": {
          "name": "cve-database.git:bin/generate-csaf.pl",
          "version": "1"
        }
      },
      "id": "SUSE-SU-2026:3124-1",
      "initial_release_date": "2026-07-20T07:01:24Z",
      "revision_history": [
        {
          "date": "2026-07-20T07:01:24Z",
          "number": "1",
          "summary": "Current version"
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "microcode_ctl-1.17-102.83.95.1.i586",
                "product": {
                  "name": "microcode_ctl-1.17-102.83.95.1.i586",
                  "product_id": "microcode_ctl-1.17-102.83.95.1.i586"
                }
              }
            ],
            "category": "architecture",
            "name": "i586"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "microcode_ctl-1.17-102.83.95.1.x86_64",
                "product": {
                  "name": "microcode_ctl-1.17-102.83.95.1.x86_64",
                  "product_id": "microcode_ctl-1.17-102.83.95.1.x86_64"
                }
              }
            ],
            "category": "architecture",
            "name": "x86_64"
          },
          {
            "branches": [
              {
                "category": "product_name",
                "name": "SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE",
                "product": {
                  "name": "SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE",
                  "product_id": "SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:suse:suse_sles_ltss-extreme-core:11:sp4"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "SUSE Linux Enterprise"
          }
        ],
        "category": "vendor",
        "name": "SUSE"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "microcode_ctl-1.17-102.83.95.1.x86_64 as component of SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE",
          "product_id": "SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:microcode_ctl-1.17-102.83.95.1.x86_64"
        },
        "product_reference": "microcode_ctl-1.17-102.83.95.1.x86_64",
        "relates_to_product_reference": "SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2025-35979",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2025-35979"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "Exposure of sensitive information caused by shared microarchitectural predictor state that influences transient execution for some Intel(R) Processors within VMX non-root (guest) operation may allow an information disclosure. Unprivileged software adversary with an authenticated user combined with a high complexity attack may enable data exposure. This result may potentially occur via local access when attack requirements are present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (high), integrity (none) and availability (none) of the vulnerable system, resulting in subsequent system confidentiality (high), integrity (none) and availability (none) impacts.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:microcode_ctl-1.17-102.83.95.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2025-35979",
          "url": "https://www.suse.com/security/cve/CVE-2025-35979"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1265189 for CVE-2025-35979",
          "url": "https://bugzilla.suse.com/1265189"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:microcode_ctl-1.17-102.83.95.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 4.7,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:microcode_ctl-1.17-102.83.95.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-07-20T07:01:24Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2025-35979"
    }
  ]
}

CVE-2025-35979 (GCVE-0-2025-35979)

Vulnerability from cvelistv5 – Published: 2026-05-12 16:35 – Updated: 2026-05-12 17:06

Summary

Exposure of sensitive information caused by shared microarchitectural predictor state that influences transient execution for some Intel(R) Processors within VMX non-root (guest) operation may allow an information disclosure. Unprivileged software adversary with an authenticated user combined with a high complexity attack may enable data exposure. This result may potentially occur via local access when attack requirements are present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (high), integrity (none) and availability (none) of the vulnerable system, resulting in subsequent system confidentiality (high), integrity (none) and availability (none) impacts.

Severity

6.8 (Medium)


                        
                          CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

Information Disclosure
CWE-1423 - Exposure of Sensitive Information caused by Shared Microarchitectural Predictor State that Influences Transient Execution

Assigner

intel

References

1 reference

URL	Tags
https://intel.com/content/www/us/en/security-cent…

Impacted products

1 product

Vendor	Product	Version
n/a	Intel(R) Processors	Affected: See references

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-35979",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-12T16:59:25.435200Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-12T17:06:38.320Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Intel(R) Processors",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "See references"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Exposure of sensitive information caused by shared microarchitectural predictor state that influences transient execution for some Intel(R) Processors within VMX non-root (guest) operation may allow an information disclosure. Unprivileged software adversary with an authenticated user combined with a high complexity attack may enable data exposure. This result may potentially occur via local access when attack requirements are present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (high), integrity (none) and availability (none) of the vulnerable system, resulting in subsequent system confidentiality (high), integrity (none) and availability (none) impacts."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "HIGH",
            "attackRequirements": "PRESENT",
            "attackVector": "LOCAL",
            "baseScore": 6.8,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "HIGH",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "NONE"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "Information Disclosure",
              "lang": "en"
            },
            {
              "cweId": "CWE-1423",
              "description": "Exposure of Sensitive Information caused by Shared Microarchitectural Predictor State that Influences Transient Execution",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-12T16:35:09.865Z",
        "orgId": "6dda929c-bb53-4a77-a76d-48e79601a1ce",
        "shortName": "intel"
      },
      "references": [
        {
          "name": "https://intel.com/content/www/us/en/security-center/advisory/intel-sa-01420.html",
          "url": "https://intel.com/content/www/us/en/security-center/advisory/intel-sa-01420.html"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "6dda929c-bb53-4a77-a76d-48e79601a1ce",
    "assignerShortName": "intel",
    "cveId": "CVE-2025-35979",
    "datePublished": "2026-05-12T16:35:09.865Z",
    "dateReserved": "2025-04-15T21:20:16.409Z",
    "dateUpdated": "2026-05-12T17:06:38.320Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

SUSE-SU-2026:3124-1

CVE-2025-35979 (GCVE-0-2025-35979)

Tags

Sightings

Nomenclature