CVE-2025-40238

UNRATEDCVSS · not yet scored
—
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No CVSS published and no exploitation signals yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS v2: —Exploit: None knownExposed: 0

A fix is available — apply it.

In the Linux kernel, the following vulnerability has been resolved:

net/mlx5: Fix IPsec cleanup over MPV device

When we do mlx5e_detach_netdev() we eventually disable blocking events notifier, among those events are IPsec MPV events from IB to core.

So before disabling those blocking events, make sure to also unregister the devcom device and mark all this device operations as complete, in order to prevent the other device from using invalid netdev during future devcom events which could cause the trace below.

BUG: kernel NULL pointer dereference, address: 0000000000000010 PGD 146427067 P4D 146427067 PUD 146488067 PMD 0 Oops: Oops: 0000 [#1] SMP CPU: 1 UID: 0 PID: 7735 Comm: devlink Tainted: GW 6.12.0-rc6_for_upstream_min_debug_2024_11_08_00_46 #1 Tainted: [W]=WARN Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014 RIP: 0010:mlx5_devcom_comp_set_ready+0x5/0x40 [mlx5_core] Code: 00 01 48 83 05 23 32 1e 00 01 41 b8 ed ff ff ff e9 60 ff ff ff 48 83 05 00 32 1e 00 01 eb e3 66 0f 1f 44 00 00 0f 1f 44 00 00 <48> 8b 47 10 48 83 05 5f 32 1e 00 01 48 8b 50 40 48 85 d2 74 05 40 RSP: 0018:ffff88811a5c35f8 EFLAGS: 00010206 RAX: ffff888106e8ab80 RBX: ffff888107d7e200 RCX: ffff88810d6f0a00 RDX: ffff88810d6f0a00 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffff88811a17e620 R08: 0000000000000040 R09: 0000000000000000 R10: ffff88811a5c3618 R11: 0000000de85d51bd R12: ffff88811a17e600 R13: ffff88810d6f0a00 R14: 0000000000000000 R15: ffff8881034bda80 FS: 00007f27bdf89180(0000) GS:ffff88852c880000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000010 CR3: 000000010f159005 CR4: 0000000000372eb0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ? __die+0x20/0x60 ? page_fault_oops+0x150/0x3e0 ? exc_page_fault+0x74/0x130 ? asm_exc_page_fault+0x22/0x30 ? mlx5_devcom_comp_set_ready+0x5/0x40 [mlx5_core] mlx5e_devcom_event_mpv+0x42/0x60 [mlx5_core] mlx5_devcom_send_event+0x8c/0x170 [mlx5_core] blocking_event+0x17b/0x230 [mlx5_core] notifier_call_chain+0x35/0xa0 blocking_notifier_call_chain+0x3d/0x60 mlx5_blocking_notifier_call_chain+0x22/0x30 [mlx5_core] mlx5_core_mp_event_replay+0x12/0x20 [mlx5_core] mlx5_ib_bind_slave_port+0x228/0x2c0 [mlx5_ib] mlx5_ib_stage_init_init+0x664/0x9d0 [mlx5_ib] ? idr_alloc_cyclic+0x50/0xb0 ? __kmalloc_cache_noprof+0x167/0x340 ? __kmalloc_noprof+0x1a7/0x430 __mlx5_ib_add+0x34/0xd0 [mlx5_ib] mlx5r_probe+0xe9/0x310 [mlx5_ib] ? kernfs_add_one+0x107/0x150 ? __mlx5_ib_add+0xd0/0xd0 [mlx5_ib] auxiliary_bus_probe+0x3e/0x90 really_probe+0xc5/0x3a0 ? driver_probe_device+0x90/0x90 __driver_probe_device+0x80/0x160 driver_probe_device+0x1e/0x90 __device_attach_driver+0x7d/0x100 bus_for_each_drv+0x80/0xd0 __device_attach+0xbc/0x1f0 bus_probe_device+0x86/0xa0 device_add+0x62d/0x830 __auxiliary_device_add+0x3b/0xa0 ? auxiliary_device_init+0x41/0x90 add_adev+0xd1/0x150 [mlx5_core] mlx5_rescan_drivers_locked+0x21c/0x300 [mlx5_core] esw_mode_change+0x6c/0xc0 [mlx5_core] mlx5_devlink_eswitch_mode_set+0x21e/0x640 [mlx5_core] devlink_nl_eswitch_set_doit+0x60/0xe0 genl_family_rcv_msg_doit+0xd0/0x120 genl_rcv_msg+0x180/0x2b0 ? devlink_get_from_attrs_lock+0x170/0x170 ? devlink_nl_eswitch_get_doit+0x290/0x290 ? devlink_nl_pre_doit_port_optional+0x50/0x50 ? genl_family_rcv_msg_dumpit+0xf0/0xf0 netlink_rcv_skb+0x54/0x100 genl_rcv+0x24/0x40 netlink_unicast+0x1fc/0x2d0 netlink_sendmsg+0x1e4/0x410 __sock_sendmsg+0x38/0x60 ? sockfd_lookup_light+0x12/0x60 __sys_sendto+0x105/0x160 ? __sys_recvmsg+0x4e/0x90 __x64_sys_sendto+0x20/0x30 do_syscall_64+0x4c/0x100 entry_SYSCALL_64_after_hwframe+0x4b/0x53 RIP: 0033:0x7f27bc91b13a Code: bb 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 8b 05 fa 96 2c 00 45 89 c9 4c 63 d1 48 63 ff 85 c0 75 15 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff ---truncated---

CVSS v3
—
EchelonGraph score
Not yet assessedNo source has published severity data for this CVE yet — no CVSS score from NVD or a CNA, no GitHub advisory, and it is not in CISA KEV. This is not a rating of zero; we cannot assess it yet.
EG Score
—
EG Risk
—
EPSS PROB
0%
EPSS %ILE
9%
KEV
Not listed

Published

December 4, 2025

Last Modified

April 15, 2026

References (3)

Patch Availability(16)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-oem-6.17 (6.17.0-1011.11) @ noble2026-05-21ubuntu
ubuntulinux-tools-oracle-64k-6.17 (6.17.0-1007.7) @ questing2026-05-21ubuntu
ubuntulinux-tools-gcp-64k-6.17 (6.17.0-1007.7) @ questing2026-05-21ubuntu
ubuntulinux-virtual-hwe-24.04-edge (6.17.0-14.14) @ questing2026-05-21ubuntu
ubuntulinux-tools-azure-6.17 (6.17.0-1008.8) @ questing2026-05-21ubuntu
ubuntulinux-virtual-6.8 (6.8.0-106.106) @ noble2026-05-21ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1049.52.1) @ noble2026-05-21ubuntu
ubuntulinux-tools-gcp-fips-6.8 (6.8.0-1052.55+fips1) @ noble2026-05-21ubuntu
ubuntulinux-tools-azure-edge (6.8.0-1051.57~22.04.1) @ jammy2026-05-21ubuntu
ubuntulinux-tools-aws-edge (6.8.0-1050.53~22.04.1) @ jammy2026-05-21ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1052.58+fips1) @ noble2026-05-21ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2040.41) @ noble2026-05-21ubuntu
ubuntulinux-tools-realtime-6.8.1 (6.8.1-1045.46) @ noble2026-05-21ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1051.57) @ noble2026-05-21ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1029.30) @ noble2026-05-21ubuntu
linuxKernel @ 6.12.56—osv

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

All Vendor Advisories

(15)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 7× in last 7d / 39× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 132 total refreshes for this CVE.

  1. 2026-08-04 15:09 UTCEPSS rescore
  2. 2026-08-04 10:37 UTCEPSS rescore
  3. 2026-08-03 10:35 UTCEPSS rescore
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  14. 2026-07-23 02:55 UTCEG score recompute
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  1. 2026-07-15 16:57 UTCEPSS rescore
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  9. 2026-07-11 08:27 UTCEPSS rescore
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  11. 2026-07-10 00:47 UTCOSV refresh
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  40. 2026-06-21 11:31 UTCOSV refresh
  41. 2026-06-21 01:59 UTCEPSS rescore
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  43. 2026-06-19 19:25 UTCEPSS rescore
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  45. 2026-06-18 17:52 UTCEPSS rescore
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  67. 2026-06-02 03:39 UTCOSV refresh
  68. 2026-06-01 13:51 UTCEPSS rescore
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  73. 2026-05-29 13:44 UTCEPSS rescore
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Frequently asked(4)

What is CVE-2025-40238?
CVE-2025-40238 is a publicly disclosed vulnerability published on December 4, 2025. In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Fix IPsec cleanup over MPV device When we do mlx5edetachnetdev() we eventually disable blocking events notifier, among those events are IPsec MPV events from IB to core. So before disabling those blocking events, make…
When was CVE-2025-40238 disclosed?
CVE-2025-40238 was first published in the National Vulnerability Database on December 4, 2025, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-40238 actively exploited?
CVE-2025-40238 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 90.7% of all scored CVEs.
How do I remediate CVE-2025-40238?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-40238, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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