SUSE-SU-2026:0204-1

Vulnerability from csaf_suse - Published: 2026-01-21 13:33 - Updated: 2026-01-21 13:33
Summary
Security update for the Linux Kernel (Live Patch 16 for SUSE Linux Enterprise 15 SP6)

Notes

Title of the patch
Security update for the Linux Kernel (Live Patch 16 for SUSE Linux Enterprise 15 SP6)
Description of the patch
This update for the SUSE Linux Enterprise kernel 6.4.0-150600.23.73 fixes various security issues The following security issues were fixed: - CVE-2023-53676: scsi: target: iscsi: Fix buffer overflow in lio_target_nacl_info_show() (bsc#1251787). - CVE-2025-40204: sctp: Fix MAC comparison to be constant-time (bsc#1253437).
Patchnames
SUSE-2026-204,SUSE-SLE-Module-Live-Patching-15-SP6-2026-204
Terms of use
CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
To clipboard 

{
  "document": {
    "aggregate_severity": {
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      "text": "important"
    },
    "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": [
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        "category": "summary",
        "text": "Security update for the Linux Kernel (Live Patch 16 for SUSE Linux Enterprise 15 SP6)",
        "title": "Title of the patch"
      },
      {
        "category": "description",
        "text": "\nThis update for the SUSE Linux Enterprise kernel 6.4.0-150600.23.73 fixes various security issues\n\nThe following security issues were fixed:\n\n- CVE-2023-53676: scsi: target: iscsi: Fix buffer overflow in lio_target_nacl_info_show() (bsc#1251787).\n- CVE-2025-40204: sctp: Fix MAC comparison to be constant-time (bsc#1253437).\n",
        "title": "Description of the patch"
      },
      {
        "category": "details",
        "text": "SUSE-2026-204,SUSE-SLE-Module-Live-Patching-15-SP6-2026-204",
        "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": [
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        "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_0204-1.json"
      },
      {
        "category": "self",
        "summary": "URL for SUSE-SU-2026:0204-1",
        "url": "https://www.suse.com/support/update/announcement/2026/suse-su-20260204-1/"
      },
      {
        "category": "self",
        "summary": "E-Mail link for SUSE-SU-2026:0204-1",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-January/023837.html"
      },
      {
        "category": "self",
        "summary": "SUSE Bug 1251787",
        "url": "https://bugzilla.suse.com/1251787"
      },
      {
        "category": "self",
        "summary": "SUSE Bug 1253437",
        "url": "https://bugzilla.suse.com/1253437"
      },
      {
        "category": "self",
        "summary": "SUSE CVE CVE-2023-53676 page",
        "url": "https://www.suse.com/security/cve/CVE-2023-53676/"
      },
      {
        "category": "self",
        "summary": "SUSE CVE CVE-2025-40204 page",
        "url": "https://www.suse.com/security/cve/CVE-2025-40204/"
      }
    ],
    "title": "Security update for the Linux Kernel (Live Patch 16 for SUSE Linux Enterprise 15 SP6)",
    "tracking": {
      "current_release_date": "2026-01-21T13:33:35Z",
      "generator": {
        "date": "2026-01-21T13:33:35Z",
        "engine": {
          "name": "cve-database.git:bin/generate-csaf.pl",
          "version": "1"
        }
      },
      "id": "SUSE-SU-2026:0204-1",
      "initial_release_date": "2026-01-21T13:33:35Z",
      "revision_history": [
        {
          "date": "2026-01-21T13:33:35Z",
          "number": "1",
          "summary": "Current version"
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "kernel-livepatch-6_4_0-150600_23_73-default-2-150600.2.1.ppc64le",
                "product": {
                  "name": "kernel-livepatch-6_4_0-150600_23_73-default-2-150600.2.1.ppc64le",
                  "product_id": "kernel-livepatch-6_4_0-150600_23_73-default-2-150600.2.1.ppc64le"
                }
              }
            ],
            "category": "architecture",
            "name": "ppc64le"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "kernel-livepatch-6_4_0-150600_23_73-default-2-150600.2.1.s390x",
                "product": {
                  "name": "kernel-livepatch-6_4_0-150600_23_73-default-2-150600.2.1.s390x",
                  "product_id": "kernel-livepatch-6_4_0-150600_23_73-default-2-150600.2.1.s390x"
                }
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            ],
            "category": "architecture",
            "name": "s390x"
          },
          {
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            "branches": [
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                "category": "product_name",
                "name": "SUSE Linux Enterprise Live Patching 15 SP6",
                "product": {
                  "name": "SUSE Linux Enterprise Live Patching 15 SP6",
                  "product_id": "SUSE Linux Enterprise Live Patching 15 SP6",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:suse:sle-module-live-patching:15:sp6"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "SUSE Linux Enterprise"
          }
        ],
        "category": "vendor",
        "name": "SUSE"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "kernel-livepatch-6_4_0-150600_23_73-default-2-150600.2.1.ppc64le as component of SUSE Linux Enterprise Live Patching 15 SP6",
          "product_id": "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_73-default-2-150600.2.1.ppc64le"
        },
        "product_reference": "kernel-livepatch-6_4_0-150600_23_73-default-2-150600.2.1.ppc64le",
        "relates_to_product_reference": "SUSE Linux Enterprise Live Patching 15 SP6"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "kernel-livepatch-6_4_0-150600_23_73-default-2-150600.2.1.s390x as component of SUSE Linux Enterprise Live Patching 15 SP6",
          "product_id": "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_73-default-2-150600.2.1.s390x"
        },
        "product_reference": "kernel-livepatch-6_4_0-150600_23_73-default-2-150600.2.1.s390x",
        "relates_to_product_reference": "SUSE Linux Enterprise Live Patching 15 SP6"
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          "product_id": "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_73-default-2-150600.2.1.x86_64"
        },
        "product_reference": "kernel-livepatch-6_4_0-150600_23_73-default-2-150600.2.1.x86_64",
        "relates_to_product_reference": "SUSE Linux Enterprise Live Patching 15 SP6"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2023-53676",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2023-53676"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: target: iscsi: Fix buffer overflow in lio_target_nacl_info_show()\n\nThe function lio_target_nacl_info_show() uses sprintf() in a loop to print\ndetails for every iSCSI connection in a session without checking for the\nbuffer length. With enough iSCSI connections it\u0027s possible to overflow the\nbuffer provided by configfs and corrupt the memory.\n\nThis patch replaces sprintf() with sysfs_emit_at() that checks for buffer\nboundries.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_73-default-2-150600.2.1.ppc64le",
          "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_73-default-2-150600.2.1.s390x",
          "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_73-default-2-150600.2.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2023-53676",
          "url": "https://www.suse.com/security/cve/CVE-2023-53676"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1251786 for CVE-2023-53676",
          "url": "https://bugzilla.suse.com/1251786"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1251787 for CVE-2023-53676",
          "url": "https://bugzilla.suse.com/1251787"
        }
      ],
      "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 Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_73-default-2-150600.2.1.ppc64le",
            "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_73-default-2-150600.2.1.s390x",
            "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_73-default-2-150600.2.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_73-default-2-150600.2.1.ppc64le",
            "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_73-default-2-150600.2.1.s390x",
            "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_73-default-2-150600.2.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-01-21T13:33:35Z",
          "details": "important"
        }
      ],
      "title": "CVE-2023-53676"
    },
    {
      "cve": "CVE-2025-40204",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2025-40204"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: Fix MAC comparison to be constant-time\n\nTo prevent timing attacks, MACs need to be compared in constant time.\nUse the appropriate helper function for this.",
          "title": "CVE description"
        }
      ],
      "product_status": {
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          "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_73-default-2-150600.2.1.ppc64le",
          "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_73-default-2-150600.2.1.s390x",
          "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_73-default-2-150600.2.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2025-40204",
          "url": "https://www.suse.com/security/cve/CVE-2025-40204"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1253436 for CVE-2025-40204",
          "url": "https://bugzilla.suse.com/1253436"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1253437 for CVE-2025-40204",
          "url": "https://bugzilla.suse.com/1253437"
        }
      ],
      "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 Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_73-default-2-150600.2.1.ppc64le",
            "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_73-default-2-150600.2.1.s390x",
            "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_73-default-2-150600.2.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_73-default-2-150600.2.1.ppc64le",
            "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_73-default-2-150600.2.1.s390x",
            "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_23_73-default-2-150600.2.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-01-21T13:33:35Z",
          "details": "important"
        }
      ],
      "title": "CVE-2025-40204"
    }
  ]
}


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Sightings

Author Source Type Date

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.