{"cve":"CVE-2025-38146","nvd":{"published":"2025-07-03T09:15:29.410","modified":"2026-10-15T22:18:28.953","status":"Modified","description":"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 '__be32 [3]'\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 <IRQ>\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 </IRQ>","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8},"cwes":["CWE-129"],"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"],"products":["debian:debian_linux","linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:04:28.436527499+00:00"},"epss":{"cve":"CVE-2025-38146","score":0.00477,"percentile":0.40936,"date":"2026-10-26"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}