SUSE-SU-2026:21673-1

Vulnerability from csaf_suse - Published: 2026-05-15 12:22 - Updated: 2026-05-15 12:22
Summary
Security update for the Linux Kernel
Severity
Important
Notes
Title of the patch: Security update for the Linux Kernel
Description of the patch: The SUSE Linux Enterprise Micro 6.0 and Micro 6.1 kernel was updated to fix various security issues The following security issues were fixed: - CVE-2025-54518: x86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache (bsc#1264013). - CVE-2026-46300: net: skbuff: propagate shared-frag marker through pskb_copy() (bsc#1265209). The following non security issue was fixed: - io-wq: check that the predecessor is hashed in io_wq_remove_pending() (git-fixes).
Patchnames: SUSE-SLE-Micro-6.0-kernel-429
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
CVE-2025-54518
7.4 (High)
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
Product Identifier Version Remediation
Unresolved product id: SUSE Linux Micro 6.0:kernel-default-6.4.0-44.1.aarch64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.0:kernel-default-6.4.0-44.1.s390x —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.0:kernel-default-6.4.0-44.1.x86_64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.0:kernel-default-base-6.4.0-44.1.21.21.aarch64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.0:kernel-default-base-6.4.0-44.1.21.21.x86_64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.0:kernel-default-livepatch-6.4.0-44.1.s390x —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.0:kernel-default-livepatch-6.4.0-44.1.x86_64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.0:kernel-devel-6.4.0-44.1.noarch —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.0:kernel-kvmsmall-6.4.0-44.1.x86_64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.0:kernel-macros-6.4.0-44.1.noarch —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.0:kernel-source-6.4.0-44.1.noarch —
Vendor Fix
Threats
Impact important
CVE-2026-46300
8.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Affected products
Product Identifier Version Remediation
Unresolved product id: SUSE Linux Micro 6.0:kernel-default-6.4.0-44.1.aarch64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.0:kernel-default-6.4.0-44.1.s390x —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.0:kernel-default-6.4.0-44.1.x86_64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.0:kernel-default-base-6.4.0-44.1.21.21.aarch64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.0:kernel-default-base-6.4.0-44.1.21.21.x86_64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.0:kernel-default-livepatch-6.4.0-44.1.s390x —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.0:kernel-default-livepatch-6.4.0-44.1.x86_64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.0:kernel-devel-6.4.0-44.1.noarch —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.0:kernel-kvmsmall-6.4.0-44.1.x86_64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.0:kernel-macros-6.4.0-44.1.noarch —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.0:kernel-source-6.4.0-44.1.noarch —
Vendor Fix
Threats
Impact important
References
To clipboard 

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  "vulnerabilities": [
    {
      "cve": "CVE-2025-54518",
      "ids": [
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          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2025-54518"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "Improper isolation of shared resources within the CPU operation cache on Zen 2-based products could allow an attacker to corrupt instructions executed at a different privilege level, potentially resulting in privilege escalation.",
          "title": "CVE description"
        }
      ],
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        },
        {
          "category": "external",
          "summary": "SUSE Bug 1264013 for CVE-2025-54518",
          "url": "https://bugzilla.suse.com/1264013"
        },
        {
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          "summary": "SUSE Bug 1264066 for CVE-2025-54518",
          "url": "https://bugzilla.suse.com/1264066"
        },
        {
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          "summary": "SUSE Bug 1264096 for CVE-2025-54518",
          "url": "https://bugzilla.suse.com/1264096"
        }
      ],
      "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",
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      "scores": [
        {
          "cvss_v3": {
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
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      "threats": [
        {
          "category": "impact",
          "date": "2026-05-15T12:22:55Z",
          "details": "important"
        }
      ],
      "title": "CVE-2025-54518"
    },
    {
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          "text": "unknown",
          "title": "CVE description"
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          "SUSE Linux Micro 6.0:kernel-default-6.4.0-44.1.aarch64",
          "SUSE Linux Micro 6.0:kernel-default-6.4.0-44.1.s390x",
          "SUSE Linux Micro 6.0:kernel-default-6.4.0-44.1.x86_64",
          "SUSE Linux Micro 6.0:kernel-default-base-6.4.0-44.1.21.21.aarch64",
          "SUSE Linux Micro 6.0:kernel-default-base-6.4.0-44.1.21.21.x86_64",
          "SUSE Linux Micro 6.0:kernel-default-livepatch-6.4.0-44.1.s390x",
          "SUSE Linux Micro 6.0:kernel-default-livepatch-6.4.0-44.1.x86_64",
          "SUSE Linux Micro 6.0:kernel-devel-6.4.0-44.1.noarch",
          "SUSE Linux Micro 6.0:kernel-kvmsmall-6.4.0-44.1.x86_64",
          "SUSE Linux Micro 6.0:kernel-macros-6.4.0-44.1.noarch",
          "SUSE Linux Micro 6.0:kernel-source-6.4.0-44.1.noarch"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-46300",
          "url": "https://www.suse.com/security/cve/CVE-2026-46300"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1265209 for CVE-2026-46300",
          "url": "https://bugzilla.suse.com/1265209"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1265226 for CVE-2026-46300",
          "url": "https://bugzilla.suse.com/1265226"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1265312 for CVE-2026-46300",
          "url": "https://bugzilla.suse.com/1265312"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1265383 for CVE-2026-46300",
          "url": "https://bugzilla.suse.com/1265383"
        }
      ],
      "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 Micro 6.0:kernel-default-6.4.0-44.1.aarch64",
            "SUSE Linux Micro 6.0:kernel-default-6.4.0-44.1.s390x",
            "SUSE Linux Micro 6.0:kernel-default-6.4.0-44.1.x86_64",
            "SUSE Linux Micro 6.0:kernel-default-base-6.4.0-44.1.21.21.aarch64",
            "SUSE Linux Micro 6.0:kernel-default-base-6.4.0-44.1.21.21.x86_64",
            "SUSE Linux Micro 6.0:kernel-default-livepatch-6.4.0-44.1.s390x",
            "SUSE Linux Micro 6.0:kernel-default-livepatch-6.4.0-44.1.x86_64",
            "SUSE Linux Micro 6.0:kernel-devel-6.4.0-44.1.noarch",
            "SUSE Linux Micro 6.0:kernel-kvmsmall-6.4.0-44.1.x86_64",
            "SUSE Linux Micro 6.0:kernel-macros-6.4.0-44.1.noarch",
            "SUSE Linux Micro 6.0:kernel-source-6.4.0-44.1.noarch"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Micro 6.0:kernel-default-6.4.0-44.1.aarch64",
            "SUSE Linux Micro 6.0:kernel-default-6.4.0-44.1.s390x",
            "SUSE Linux Micro 6.0:kernel-default-6.4.0-44.1.x86_64",
            "SUSE Linux Micro 6.0:kernel-default-base-6.4.0-44.1.21.21.aarch64",
            "SUSE Linux Micro 6.0:kernel-default-base-6.4.0-44.1.21.21.x86_64",
            "SUSE Linux Micro 6.0:kernel-default-livepatch-6.4.0-44.1.s390x",
            "SUSE Linux Micro 6.0:kernel-default-livepatch-6.4.0-44.1.x86_64",
            "SUSE Linux Micro 6.0:kernel-devel-6.4.0-44.1.noarch",
            "SUSE Linux Micro 6.0:kernel-kvmsmall-6.4.0-44.1.x86_64",
            "SUSE Linux Micro 6.0:kernel-macros-6.4.0-44.1.noarch",
            "SUSE Linux Micro 6.0:kernel-source-6.4.0-44.1.noarch"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-05-15T12:22:55Z",
          "details": "important"
        }
      ],
      "title": "CVE-2026-46300"
    }
  ]
}


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Tags
Taxonomy of the tags.




Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.