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net: openvswitch: Fix the dead loop of MPLS parse

Type: advisorySource: Official CVE List1 source record

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

Announced Source revision 1
Original source ↗

CVE-2025-38146

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2025-38146

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3",
        "lessThan": "4b9a086eedc1fddae632310386098c12155e3d0a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3",
        "lessThan": "ad17eb86d042d72a59fd184ad1adf34f5eb36843",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3",
        "lessThan": "f26fe7c3002516dd3c288f1012786df31f4d89e0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3",
        "lessThan": "8ebcd311b4866ab911d1445ead08690e67f0c488",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3",
        "lessThan": "69541e58323ec3e3904e1fa87a6213961b1f52f4",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3",
        "lessThan": "3c1906a3d50cb94fd0a10e97a1c0a40c0f033cb7",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3",
        "lessThan": "0bdc924bfb319fb10d1113cbf091fc26fb7b1f99",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/openvswitch/flow.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.5"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.5",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.239",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.186",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.142",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.94",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.34",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.15.3",
        "versionType": "semver",
        "lessThanOrEqual": "6.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.16",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/openvswitch/flow.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2025-38146

Source reference: /cveMetadata/cveId

Publisher severity

critical

Source reference: /containers/cna/metrics

Event
#30529 · Revision 1
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Publisher date
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