suse-su-2025:03104-1
Vulnerability from csaf_suse
Published
2025-09-08 21:13
Modified
2025-09-08 21:13
Summary
Security update for the Linux Kernel RT (Live Patch 1 for SLE 15 SP7)

Notes

Title of the patch
Security update for the Linux Kernel RT (Live Patch 1 for SLE 15 SP7)
Description of the patch
This update for the Linux Kernel 6.4.0-150700_7_3 fixes several issues. The following security issues were fixed: - CVE-2025-38087: net/sched: fix use-after-free in taprio_dev_notifier (bsc#1245504). - CVE-2025-38001: net_sched: hfsc: Address reentrant enqueue adding class to eltree twice (bsc#1244235). - CVE-2025-38000: sch_hfsc: Fix qlen accounting bug when using peek in hfsc_enqueue() (bsc#1245775). - CVE-2025-38212: ipc: fix to protect IPCS lookups using RCU (bsc#1246030).
Patchnames
SUSE-2025-3104,SUSE-SLE-Module-Live-Patching-15-SP6-2025-3104,SUSE-SLE-Module-Live-Patching-15-SP7-2025-3107
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 

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      "text": "important"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Copyright 2024 SUSE LLC. All rights reserved.",
      "tlp": {
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        "text": "Security update for the Linux Kernel RT (Live Patch 1 for SLE 15 SP7)",
        "title": "Title of the patch"
      },
      {
        "category": "description",
        "text": "This update for the Linux Kernel 6.4.0-150700_7_3 fixes several issues.\n\nThe following security issues were fixed:\n\n- CVE-2025-38087: net/sched: fix use-after-free in taprio_dev_notifier (bsc#1245504).\n- CVE-2025-38001: net_sched: hfsc: Address reentrant enqueue adding class to eltree twice (bsc#1244235).\n- CVE-2025-38000: sch_hfsc: Fix qlen accounting bug when using peek in hfsc_enqueue() (bsc#1245775).\n- CVE-2025-38212: ipc: fix to protect IPCS lookups using RCU (bsc#1246030).\n",
        "title": "Description of the patch"
      },
      {
        "category": "details",
        "text": "SUSE-2025-3104,SUSE-SLE-Module-Live-Patching-15-SP6-2025-3104,SUSE-SLE-Module-Live-Patching-15-SP7-2025-3107",
        "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/",
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        "summary": "SUSE ratings",
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      },
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        "summary": "URL of this CSAF notice",
        "url": "https://ftp.suse.com/pub/projects/security/csaf/suse-su-2025_03104-1.json"
      },
      {
        "category": "self",
        "summary": "URL for SUSE-SU-2025:03104-1",
        "url": "https://www.suse.com/support/update/announcement/2025/suse-su-202503104-1/"
      },
      {
        "category": "self",
        "summary": "E-Mail link for SUSE-SU-2025:03104-1",
        "url": "https://lists.suse.com/pipermail/sle-updates/2025-September/041541.html"
      },
      {
        "category": "self",
        "summary": "SUSE Bug 1244235",
        "url": "https://bugzilla.suse.com/1244235"
      },
      {
        "category": "self",
        "summary": "SUSE Bug 1245505",
        "url": "https://bugzilla.suse.com/1245505"
      },
      {
        "category": "self",
        "summary": "SUSE Bug 1245775",
        "url": "https://bugzilla.suse.com/1245775"
      },
      {
        "category": "self",
        "summary": "SUSE Bug 1246030",
        "url": "https://bugzilla.suse.com/1246030"
      },
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        "summary": "SUSE Bug 1248108",
        "url": "https://bugzilla.suse.com/1248108"
      },
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        "summary": "SUSE CVE CVE-2025-38000 page",
        "url": "https://www.suse.com/security/cve/CVE-2025-38000/"
      },
      {
        "category": "self",
        "summary": "SUSE CVE CVE-2025-38001 page",
        "url": "https://www.suse.com/security/cve/CVE-2025-38001/"
      },
      {
        "category": "self",
        "summary": "SUSE CVE CVE-2025-38087 page",
        "url": "https://www.suse.com/security/cve/CVE-2025-38087/"
      },
      {
        "category": "self",
        "summary": "SUSE CVE CVE-2025-38212 page",
        "url": "https://www.suse.com/security/cve/CVE-2025-38212/"
      }
    ],
    "title": "Security update for the Linux Kernel RT (Live Patch 1 for SLE 15 SP7)",
    "tracking": {
      "current_release_date": "2025-09-08T21:13:26Z",
      "generator": {
        "date": "2025-09-08T21:13:26Z",
        "engine": {
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          "version": "1"
        }
      },
      "id": "SUSE-SU-2025:03104-1",
      "initial_release_date": "2025-09-08T21:13:26Z",
      "revision_history": [
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          "date": "2025-09-08T21:13:26Z",
          "number": "1",
          "summary": "Current version"
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "kernel-livepatch-6_4_0-150600_10_39-rt-4-150600.2.1.x86_64",
                "product": {
                  "name": "kernel-livepatch-6_4_0-150600_10_39-rt-4-150600.2.1.x86_64",
                  "product_id": "kernel-livepatch-6_4_0-150600_10_39-rt-4-150600.2.1.x86_64"
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                  "product_id": "kernel-livepatch-6_4_0-150700_7_3-rt-3-150700.2.1.x86_64"
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            "category": "architecture",
            "name": "x86_64"
          },
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            "branches": [
              {
                "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_name",
                "name": "SUSE Linux Enterprise Live Patching 15 SP7",
                "product": {
                  "name": "SUSE Linux Enterprise Live Patching 15 SP7",
                  "product_id": "SUSE Linux Enterprise Live Patching 15 SP7",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:suse:sle-module-live-patching:15:sp7"
                  }
                }
              }
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            "category": "product_family",
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          }
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        "category": "vendor",
        "name": "SUSE"
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    "relationships": [
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        "full_product_name": {
          "name": "kernel-livepatch-6_4_0-150600_10_39-rt-4-150600.2.1.x86_64 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_10_39-rt-4-150600.2.1.x86_64"
        },
        "product_reference": "kernel-livepatch-6_4_0-150600_10_39-rt-4-150600.2.1.x86_64",
        "relates_to_product_reference": "SUSE Linux Enterprise Live Patching 15 SP6"
      },
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        "full_product_name": {
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          "product_id": "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_7_3-rt-3-150700.2.1.x86_64"
        },
        "product_reference": "kernel-livepatch-6_4_0-150700_7_3-rt-3-150700.2.1.x86_64",
        "relates_to_product_reference": "SUSE Linux Enterprise Live Patching 15 SP7"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2025-38000",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2025-38000"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nsch_hfsc: Fix qlen accounting bug when using peek in hfsc_enqueue()\n\nWhen enqueuing the first packet to an HFSC class, hfsc_enqueue() calls the\nchild qdisc\u0027s peek() operation before incrementing sch-\u003eq.qlen and\nsch-\u003eqstats.backlog. If the child qdisc uses qdisc_peek_dequeued(), this may\ntrigger an immediate dequeue and potential packet drop. In such cases,\nqdisc_tree_reduce_backlog() is called, but the HFSC qdisc\u0027s qlen and backlog\nhave not yet been updated, leading to inconsistent queue accounting. This\ncan leave an empty HFSC class in the active list, causing further\nconsequences like use-after-free.\n\nThis patch fixes the bug by moving the increment of sch-\u003eq.qlen and\nsch-\u003eqstats.backlog before the call to the child qdisc\u0027s peek() operation.\nThis ensures that queue length and backlog are always accurate when packet\ndrops or dequeues are triggered during the peek.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_10_39-rt-4-150600.2.1.x86_64",
          "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_7_3-rt-3-150700.2.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2025-38000",
          "url": "https://www.suse.com/security/cve/CVE-2025-38000"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1244277 for CVE-2025-38000",
          "url": "https://bugzilla.suse.com/1244277"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1245775 for CVE-2025-38000",
          "url": "https://bugzilla.suse.com/1245775"
        }
      ],
      "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_10_39-rt-4-150600.2.1.x86_64",
            "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_7_3-rt-3-150700.2.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:H/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_10_39-rt-4-150600.2.1.x86_64",
            "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_7_3-rt-3-150700.2.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2025-09-08T21:13:26Z",
          "details": "important"
        }
      ],
      "title": "CVE-2025-38000"
    },
    {
      "cve": "CVE-2025-38001",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2025-38001"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet_sched: hfsc: Address reentrant enqueue adding class to eltree twice\n\nSavino says:\n    \"We are writing to report that this recent patch\n    (141d34391abbb315d68556b7c67ad97885407547) [1]\n    can be bypassed, and a UAF can still occur when HFSC is utilized with\n    NETEM.\n\n    The patch only checks the cl-\u003ecl_nactive field to determine whether\n    it is the first insertion or not [2], but this field is only\n    incremented by init_vf [3].\n\n    By using HFSC_RSC (which uses init_ed) [4], it is possible to bypass the\n    check and insert the class twice in the eltree.\n    Under normal conditions, this would lead to an infinite loop in\n    hfsc_dequeue for the reasons we already explained in this report [5].\n\n    However, if TBF is added as root qdisc and it is configured with a\n    very low rate,\n    it can be utilized to prevent packets from being dequeued.\n    This behavior can be exploited to perform subsequent insertions in the\n    HFSC eltree and cause a UAF.\"\n\nTo fix both the UAF and the infinite loop, with netem as an hfsc child,\ncheck explicitly in hfsc_enqueue whether the class is already in the eltree\nwhenever the HFSC_RSC flag is set.\n\n[1] https://web.git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=141d34391abbb315d68556b7c67ad97885407547\n[2] https://elixir.bootlin.com/linux/v6.15-rc5/source/net/sched/sch_hfsc.c#L1572\n[3] https://elixir.bootlin.com/linux/v6.15-rc5/source/net/sched/sch_hfsc.c#L677\n[4] https://elixir.bootlin.com/linux/v6.15-rc5/source/net/sched/sch_hfsc.c#L1574\n[5] https://lore.kernel.org/netdev/8DuRWwfqjoRDLDmBMlIfbrsZg9Gx50DHJc1ilxsEBNe2D6NMoigR_eIRIG0LOjMc3r10nUUZtArXx4oZBIdUfZQrwjcQhdinnMis_0G7VEk=@willsroot.io/T/#u",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_10_39-rt-4-150600.2.1.x86_64",
          "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_7_3-rt-3-150700.2.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2025-38001",
          "url": "https://www.suse.com/security/cve/CVE-2025-38001"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1244234 for CVE-2025-38001",
          "url": "https://bugzilla.suse.com/1244234"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1244235 for CVE-2025-38001",
          "url": "https://bugzilla.suse.com/1244235"
        }
      ],
      "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_10_39-rt-4-150600.2.1.x86_64",
            "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_7_3-rt-3-150700.2.1.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_10_39-rt-4-150600.2.1.x86_64",
            "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_7_3-rt-3-150700.2.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2025-09-08T21:13:26Z",
          "details": "important"
        }
      ],
      "title": "CVE-2025-38001"
    },
    {
      "cve": "CVE-2025-38087",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2025-38087"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: fix use-after-free in taprio_dev_notifier\n\nSince taprio\u0027s taprio_dev_notifier() isn\u0027t protected by an\nRCU read-side critical section, a race with advance_sched()\ncan lead to a use-after-free.\n\nAdding rcu_read_lock() inside taprio_dev_notifier() prevents this.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_10_39-rt-4-150600.2.1.x86_64",
          "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_7_3-rt-3-150700.2.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2025-38087",
          "url": "https://www.suse.com/security/cve/CVE-2025-38087"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1245504 for CVE-2025-38087",
          "url": "https://bugzilla.suse.com/1245504"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1245505 for CVE-2025-38087",
          "url": "https://bugzilla.suse.com/1245505"
        }
      ],
      "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_10_39-rt-4-150600.2.1.x86_64",
            "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_7_3-rt-3-150700.2.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:H/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_10_39-rt-4-150600.2.1.x86_64",
            "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_7_3-rt-3-150700.2.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2025-09-08T21:13:26Z",
          "details": "important"
        }
      ],
      "title": "CVE-2025-38087"
    },
    {
      "cve": "CVE-2025-38212",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2025-38212"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nipc: fix to protect IPCS lookups using RCU\n\nsyzbot reported that it discovered a use-after-free vulnerability, [0]\n\n[0]: https://lore.kernel.org/all/67af13f8.050a0220.21dd3.0038.GAE@google.com/\n\nidr_for_each() is protected by rwsem, but this is not enough.  If it is\nnot protected by RCU read-critical region, when idr_for_each() calls\nradix_tree_node_free() through call_rcu() to free the radix_tree_node\nstructure, the node will be freed immediately, and when reading the next\nnode in radix_tree_for_each_slot(), the already freed memory may be read.\n\nTherefore, we need to add code to make sure that idr_for_each() is\nprotected within the RCU read-critical region when we call it in\nshm_destroy_orphaned().",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_10_39-rt-4-150600.2.1.x86_64",
          "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_7_3-rt-3-150700.2.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2025-38212",
          "url": "https://www.suse.com/security/cve/CVE-2025-38212"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1246029 for CVE-2025-38212",
          "url": "https://bugzilla.suse.com/1246029"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1246030 for CVE-2025-38212",
          "url": "https://bugzilla.suse.com/1246030"
        }
      ],
      "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_10_39-rt-4-150600.2.1.x86_64",
            "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_7_3-rt-3-150700.2.1.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_10_39-rt-4-150600.2.1.x86_64",
            "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_7_3-rt-3-150700.2.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2025-09-08T21:13:26Z",
          "details": "important"
        }
      ],
      "title": "CVE-2025-38212"
    }
  ]
}


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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
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  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.