net: openvswitch: Fix the dead loop of MPLS parse

{
  "id": "192958e38ae8ebe71609d4d2d2f5c13d1a7c2836a14b2a0db7ece176275aee2e",
  "url": "https://osv.dev/vulnerability/CVE-2025-38146",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "net: openvswitch: Fix the dead loop of MPLS parse",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: net: openvswitch: Fix the dead loop of MPLS parse The unexpected MPLS packet may not end with the bottom label stack. When there are many stacks, The label count value has wrapped around. A dead loop occurs, soft lockup/CPU stuck finally. stack backtrace: UBSAN: array-index-out-of-bounds in /build/linux-0Pa0xK/linux-5.15.0/net/openvswitch/flow.c:662:26 index -1 is out of range for type '__be32 [3]' CPU: 34 PID: 0 Comm: swapper/34 Kdump: loaded Tainted: G OE 5.15.0-121-generic #131-Ubuntu Hardware name: Dell Inc. PowerEdge C6420/0JP9TF, BIOS 2.12.2 07/14/2021 Call Trace: show_stack+0x52/0x5c dump_stack_lvl+0x4a/0x63 dump_stack+0x10/0x16 ubsan_epilogue+0x9/0x36 __ubsan_handle_out_of_bounds.cold+0x44/0x49 key_extract_l3l4+0x82a/0x840 [openvswitch] ? kfree_skbmem+0x52/0xa0 key_extract+0x9c/0x2b0 [openvswitch] ovs_flow_key_extract+0x124/0x350 [openvswitch] ovs_vport_receive+0x61/0xd0 [openvswitch] ? kernel_init_free_pages.part.0+0x4a/0x70 ? get_page_from_freelist+0x353/0x540 netdev_port_receive+0xc4/0x180 [openvswitch] ? netdev_port_receive+0x180/0x180 [openvswitch] netdev_frame_hook+0x1f/0x40 [openvswitch] __netif_receive_skb_core.constprop.0+0x23a/0xf00 __netif_receive_skb_list_core+0xfa/0x240 netif_receive_skb_list_internal+0x18e/0x2a0 napi_complete_done+0x7a/0x1c0 bnxt_poll+0x155/0x1c0 [bnxt_en] __napi_poll+0x30/0x180 net_rx_action+0x126/0x280 ? bnxt_msix+0x67/0x80 [bnxt_en] handle_softirqs+0xda/0x2d0 irq_exit",
    "evidence": "osv:CVE-2025-38146",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.10.239",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.186",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.142",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.94",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.34",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.15.3",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "critical",
    "structured": {
      "id": "CVE-2025-38146",
      "aliases": [
        "CVE-2025-38146"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                  "introduced": "fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3"
                },
                {
                  "fixed": "4b9a086eedc1fddae632310386098c12155e3d0a"
                },
                {
                  "fixed": "ad17eb86d042d72a59fd184ad1adf34f5eb36843"
                },
                {
                  "fixed": "f26fe7c3002516dd3c288f1012786df31f4d89e0"
                },
                {
                  "fixed": "8ebcd311b4866ab911d1445ead08690e67f0c488"
                },
                {
                  "fixed": "69541e58323ec3e3904e1fa87a6213961b1f52f4"
                },
                {
                  "fixed": "3c1906a3d50cb94fd0a10e97a1c0a40c0f033cb7"
                },
                {
                  "fixed": "0bdc924bfb319fb10d1113cbf091fc26fb7b1f99"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-38146.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.5.0"
                },
                {
                  "fixed": "5.10.239"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.11.0"
                },
                {
                  "fixed": "5.15.186"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "6.1.142"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.94"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.34"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.15.3"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-38146.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:47.935379046Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/0bdc924bfb319fb10d1113cbf091fc26fb7b1f99",
        "https://git.kernel.org/stable/c/3c1906a3d50cb94fd0a10e97a1c0a40c0f033cb7",
        "https://git.kernel.org/stable/c/4b9a086eedc1fddae632310386098c12155e3d0a",
        "https://git.kernel.org/stable/c/69541e58323ec3e3904e1fa87a6213961b1f52f4",
        "https://git.kernel.org/stable/c/8ebcd311b4866ab911d1445ead08690e67f0c488",
        "https://git.kernel.org/stable/c/ad17eb86d042d72a59fd184ad1adf34f5eb36843",
        "https://git.kernel.org/stable/c/f26fe7c3002516dd3c288f1012786df31f4d89e0",
        "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html",
        "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38146.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-38146",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38146.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-38146",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 515872,
  "published_at": "2025-07-03T08:35:52.23+00:00"
}