SUSE-SU-2026:0561-1

Vulnerability from csaf_suse - Published: 2026-02-16 12:33 - Updated: 2026-02-16 12:33
Summary
Security update for the Linux Kernel (Live Patch 5 for SUSE Linux Enterprise 15 SP7)

Notes

Title of the patch
Security update for the Linux Kernel (Live Patch 5 for SUSE Linux Enterprise 15 SP7)
Description of the patch
This update for the SUSE Linux Enterprise kernel 6.4.0-150700.53.19 fixes various security issues The following security issues were fixed: - CVE-2025-40129: sunrpc: fix null pointer dereference on zero-length checksum (bsc#1253473). - CVE-2025-40186: tcp: Don't call reqsk_fastopen_remove() in tcp_conn_request() (bsc#1253439).
Patchnames
SUSE-2026-561,SUSE-SLE-Module-Live-Patching-15-SP7-2026-561
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"
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    "category": "csaf_security_advisory",
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    "distribution": {
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        "text": "\nThis update for the SUSE Linux Enterprise kernel 6.4.0-150700.53.19 fixes various security issues\n\nThe following security issues were fixed:\n\n- CVE-2025-40129: sunrpc: fix null pointer dereference on zero-length checksum (bsc#1253473).\n- CVE-2025-40186: tcp: Don\u0027t call reqsk_fastopen_remove() in tcp_conn_request() (bsc#1253439).\n",
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        "title": "Patchnames"
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        "category": "legal_disclaimer",
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      },
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        "url": "https://www.suse.com/security/cve/CVE-2025-40129/"
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        "url": "https://www.suse.com/security/cve/CVE-2025-40186/"
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    ],
    "title": "Security update for the Linux Kernel (Live Patch 5 for SUSE Linux Enterprise 15 SP7)",
    "tracking": {
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      "id": "SUSE-SU-2026:0561-1",
      "initial_release_date": "2026-02-16T12:33:41Z",
      "revision_history": [
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          "number": "1",
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        "branches": [
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                "name": "kernel-livepatch-6_4_0-150700_53_19-default-3-150700.2.1.ppc64le",
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                }
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            ],
            "category": "architecture",
            "name": "ppc64le"
          },
          {
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                "category": "product_version",
                "name": "kernel-livepatch-6_4_0-150700_53_19-default-3-150700.2.1.s390x",
                "product": {
                  "name": "kernel-livepatch-6_4_0-150700_53_19-default-3-150700.2.1.s390x",
                  "product_id": "kernel-livepatch-6_4_0-150700_53_19-default-3-150700.2.1.s390x"
                }
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            ],
            "category": "architecture",
            "name": "s390x"
          },
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                "name": "kernel-livepatch-6_4_0-150700_53_19-default-3-150700.2.1.x86_64",
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                "product": {
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                  "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",
            "name": "SUSE Linux Enterprise"
          }
        ],
        "category": "vendor",
        "name": "SUSE"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "kernel-livepatch-6_4_0-150700_53_19-default-3-150700.2.1.ppc64le as component of SUSE Linux Enterprise Live Patching 15 SP7",
          "product_id": "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_19-default-3-150700.2.1.ppc64le"
        },
        "product_reference": "kernel-livepatch-6_4_0-150700_53_19-default-3-150700.2.1.ppc64le",
        "relates_to_product_reference": "SUSE Linux Enterprise Live Patching 15 SP7"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
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        },
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  },
  "vulnerabilities": [
    {
      "cve": "CVE-2025-40129",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2025-40129"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nsunrpc: fix null pointer dereference on zero-length checksum\n\nIn xdr_stream_decode_opaque_auth(), zero-length checksum.len causes\nchecksum.data to be set to NULL. This triggers a NPD when accessing\nchecksum.data in gss_krb5_verify_mic_v2(). This patch ensures that\nthe value of checksum.len is not less than XDR_UNIT.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_19-default-3-150700.2.1.ppc64le",
          "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_19-default-3-150700.2.1.s390x",
          "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_19-default-3-150700.2.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2025-40129",
          "url": "https://www.suse.com/security/cve/CVE-2025-40129"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1253472 for CVE-2025-40129",
          "url": "https://bugzilla.suse.com/1253472"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1253473 for CVE-2025-40129",
          "url": "https://bugzilla.suse.com/1253473"
        }
      ],
      "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 SP7:kernel-livepatch-6_4_0-150700_53_19-default-3-150700.2.1.ppc64le",
            "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_19-default-3-150700.2.1.s390x",
            "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_19-default-3-150700.2.1.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:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_19-default-3-150700.2.1.ppc64le",
            "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_19-default-3-150700.2.1.s390x",
            "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_19-default-3-150700.2.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-02-16T12:33:41Z",
          "details": "important"
        }
      ],
      "title": "CVE-2025-40129"
    },
    {
      "cve": "CVE-2025-40186",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2025-40186"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: Don\u0027t call reqsk_fastopen_remove() in tcp_conn_request().\n\nsyzbot reported the splat below in tcp_conn_request(). [0]\n\nIf a listener is close()d while a TFO socket is being processed in\ntcp_conn_request(), inet_csk_reqsk_queue_add() does not set reqsk-\u003esk\nand calls inet_child_forget(), which calls tcp_disconnect() for the\nTFO socket.\n\nAfter the cited commit, tcp_disconnect() calls reqsk_fastopen_remove(),\nwhere reqsk_put() is called due to !reqsk-\u003esk.\n\nThen, reqsk_fastopen_remove() in tcp_conn_request() decrements the\nlast req-\u003ersk_refcnt and frees reqsk, and __reqsk_free() at the\ndrop_and_free label causes the refcount underflow for the listener\nand double-free of the reqsk.\n\nLet\u0027s remove reqsk_fastopen_remove() in tcp_conn_request().\n\nNote that other callers make sure tp-\u003efastopen_rsk is not NULL.\n\n[0]:\nrefcount_t: underflow; use-after-free.\nWARNING: CPU: 12 PID: 5563 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28)\nModules linked in:\nCPU: 12 UID: 0 PID: 5563 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full)\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025\nRIP: 0010:refcount_warn_saturate (lib/refcount.c:28)\nCode: ab e8 8e b4 98 ff 0f 0b c3 cc cc cc cc cc 80 3d a4 e4 d6 01 00 75 9c c6 05 9b e4 d6 01 01 48 c7 c7 e8 df fb ab e8 6a b4 98 ff \u003c0f\u003e 0b e9 03 5b 76 00 cc 80 3d 7d e4 d6 01 00 0f 85 74 ff ff ff c6\nRSP: 0018:ffffa79fc0304a98 EFLAGS: 00010246\nRAX: d83af4db1c6b3900 RBX: ffff9f65c7a69020 RCX: d83af4db1c6b3900\nRDX: 0000000000000000 RSI: 00000000ffff7fff RDI: ffffffffac78a280\nRBP: 000000009d781b60 R08: 0000000000007fff R09: ffffffffac6ca280\nR10: 0000000000017ffd R11: 0000000000000004 R12: ffff9f65c7b4f100\nR13: ffff9f65c7d23c00 R14: ffff9f65c7d26000 R15: ffff9f65c7a64ef8\nFS:  00007f9f962176c0(0000) GS:ffff9f65fcf00000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000200000000180 CR3: 000000000dbbe006 CR4: 0000000000372ef0\nCall Trace:\n \u003cIRQ\u003e\n tcp_conn_request (./include/linux/refcount.h:400 ./include/linux/refcount.h:432 ./include/linux/refcount.h:450 ./include/net/sock.h:1965 ./include/net/request_sock.h:131 net/ipv4/tcp_input.c:7301)\n tcp_rcv_state_process (net/ipv4/tcp_input.c:6708)\n tcp_v6_do_rcv (net/ipv6/tcp_ipv6.c:1670)\n tcp_v6_rcv (net/ipv6/tcp_ipv6.c:1906)\n ip6_protocol_deliver_rcu (net/ipv6/ip6_input.c:438)\n ip6_input (net/ipv6/ip6_input.c:500)\n ipv6_rcv (net/ipv6/ip6_input.c:311)\n __netif_receive_skb (net/core/dev.c:6104)\n process_backlog (net/core/dev.c:6456)\n __napi_poll (net/core/dev.c:7506)\n net_rx_action (net/core/dev.c:7569 net/core/dev.c:7696)\n handle_softirqs (kernel/softirq.c:579)\n do_softirq (kernel/softirq.c:480)\n \u003c/IRQ\u003e",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_19-default-3-150700.2.1.ppc64le",
          "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_19-default-3-150700.2.1.s390x",
          "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_19-default-3-150700.2.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2025-40186",
          "url": "https://www.suse.com/security/cve/CVE-2025-40186"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1253438 for CVE-2025-40186",
          "url": "https://bugzilla.suse.com/1253438"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1253439 for CVE-2025-40186",
          "url": "https://bugzilla.suse.com/1253439"
        }
      ],
      "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 SP7:kernel-livepatch-6_4_0-150700_53_19-default-3-150700.2.1.ppc64le",
            "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_19-default-3-150700.2.1.s390x",
            "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_19-default-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 SP7:kernel-livepatch-6_4_0-150700_53_19-default-3-150700.2.1.ppc64le",
            "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_19-default-3-150700.2.1.s390x",
            "SUSE Linux Enterprise Live Patching 15 SP7:kernel-livepatch-6_4_0-150700_53_19-default-3-150700.2.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-02-16T12:33:41Z",
          "details": "important"
        }
      ],
      "title": "CVE-2025-40186"
    }
  ]
}


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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.