CVE-2025-38146 (GCVE-0-2025-38146)

Vulnerability from cvelistv5 – Published: 2025-07-03 08:35 – Updated: 2025-11-03 17:34
VLAI?
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: <IRQ> 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_rcu+0x96/0xc0 common_interrupt+0x8e/0xa0 </IRQ>
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 , < 4b9a086eedc1fddae632310386098c12155e3d0a (git)
Affected: fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 , < ad17eb86d042d72a59fd184ad1adf34f5eb36843 (git)
Affected: fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 , < f26fe7c3002516dd3c288f1012786df31f4d89e0 (git)
Affected: fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 , < 8ebcd311b4866ab911d1445ead08690e67f0c488 (git)
Affected: fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 , < 69541e58323ec3e3904e1fa87a6213961b1f52f4 (git)
Affected: fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 , < 3c1906a3d50cb94fd0a10e97a1c0a40c0f033cb7 (git)
Affected: fbdcdd78da7c95f1b970d371e1b23cbd3aa990f3 , < 0bdc924bfb319fb10d1113cbf091fc26fb7b1f99 (git)
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    Linux Linux Affected: 5.5
Unaffected: 0 , < 5.5 (semver)
Unaffected: 5.10.239 , ≤ 5.10.* (semver)
Unaffected: 5.15.186 , ≤ 5.15.* (semver)
Unaffected: 6.1.142 , ≤ 6.1.* (semver)
Unaffected: 6.6.94 , ≤ 6.6.* (semver)
Unaffected: 6.12.34 , ≤ 6.12.* (semver)
Unaffected: 6.15.3 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: openvswitch: Fix the dead loop of MPLS parse\n\nThe unexpected MPLS packet may not end with the bottom label stack.\nWhen there are many stacks, The label count value has wrapped around.\nA dead loop occurs, soft lockup/CPU stuck finally.\n\nstack backtrace:\nUBSAN: array-index-out-of-bounds in /build/linux-0Pa0xK/linux-5.15.0/net/openvswitch/flow.c:662:26\nindex -1 is out of range for type \u0027__be32 [3]\u0027\nCPU: 34 PID: 0 Comm: swapper/34 Kdump: loaded Tainted: G           OE   5.15.0-121-generic #131-Ubuntu\nHardware name: Dell Inc. PowerEdge C6420/0JP9TF, BIOS 2.12.2 07/14/2021\nCall Trace:\n \u003cIRQ\u003e\n show_stack+0x52/0x5c\n dump_stack_lvl+0x4a/0x63\n dump_stack+0x10/0x16\n ubsan_epilogue+0x9/0x36\n __ubsan_handle_out_of_bounds.cold+0x44/0x49\n key_extract_l3l4+0x82a/0x840 [openvswitch]\n ? kfree_skbmem+0x52/0xa0\n key_extract+0x9c/0x2b0 [openvswitch]\n ovs_flow_key_extract+0x124/0x350 [openvswitch]\n ovs_vport_receive+0x61/0xd0 [openvswitch]\n ? kernel_init_free_pages.part.0+0x4a/0x70\n ? get_page_from_freelist+0x353/0x540\n netdev_port_receive+0xc4/0x180 [openvswitch]\n ? netdev_port_receive+0x180/0x180 [openvswitch]\n netdev_frame_hook+0x1f/0x40 [openvswitch]\n __netif_receive_skb_core.constprop.0+0x23a/0xf00\n __netif_receive_skb_list_core+0xfa/0x240\n netif_receive_skb_list_internal+0x18e/0x2a0\n napi_complete_done+0x7a/0x1c0\n bnxt_poll+0x155/0x1c0 [bnxt_en]\n __napi_poll+0x30/0x180\n net_rx_action+0x126/0x280\n ? bnxt_msix+0x67/0x80 [bnxt_en]\n handle_softirqs+0xda/0x2d0\n irq_exit_rcu+0x96/0xc0\n common_interrupt+0x8e/0xa0\n \u003c/IRQ\u003e"
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        "dateUpdated": "2025-07-28T04:13:28.266Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/4b9a086eedc1fddae632310386098c12155e3d0a"
        },
        {
          "url": "https://git.kernel.org/stable/c/ad17eb86d042d72a59fd184ad1adf34f5eb36843"
        },
        {
          "url": "https://git.kernel.org/stable/c/f26fe7c3002516dd3c288f1012786df31f4d89e0"
        },
        {
          "url": "https://git.kernel.org/stable/c/8ebcd311b4866ab911d1445ead08690e67f0c488"
        },
        {
          "url": "https://git.kernel.org/stable/c/69541e58323ec3e3904e1fa87a6213961b1f52f4"
        },
        {
          "url": "https://git.kernel.org/stable/c/3c1906a3d50cb94fd0a10e97a1c0a40c0f033cb7"
        },
        {
          "url": "https://git.kernel.org/stable/c/0bdc924bfb319fb10d1113cbf091fc26fb7b1f99"
        }
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      "title": "net: openvswitch: Fix the dead loop of MPLS parse",
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    "datePublished": "2025-07-03T08:35:52.230Z",
    "dateReserved": "2025-04-16T04:51:23.988Z",
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    "state": "PUBLISHED"
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  • 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.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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