CVE-2025-38146
Linux Kernel vulnerability
- Published3 Jul 2025
Description
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>
CVSS 3.1 breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:HAffected products
Remediation
- 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
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
Related CVEs
Recent high-severity vulnerabilities sharing a weakness type.
Frequently asked
Is CVE-2025-38146 being actively exploited?
CVE-2025-38146 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.48%.
How severe is CVE-2025-38146?
CVE-2025-38146 has a CVSS 3.1 base score of 9.4, rated critical. EPSS estimates a 0.48% probability of exploitation.
Which products are affected by CVE-2025-38146?
Affected products include Debian Linux, Linux Kernel.
How do I fix CVE-2025-38146?
Upgrade affected software to a fixed version, for example Linux Kernel 5.15.186 or later, then confirm no affected versions remain in your inventory.
How Secuno handles this
Secuno correlates vulnerabilities like CVE-2025-38146 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.
Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.