CVE-2025-40223

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:

most: usb: Fix use-after-free in hdm_disconnect

hdm_disconnect() calls most_deregister_interface(), which eventually unregisters the MOST interface device with device_unregister(iface->dev). If that drops the last reference, the device core may call release_mdev() immediately while hdm_disconnect() is still executing.

The old code also freed several mdev-owned allocations in hdm_disconnect() and then performed additional put_device() calls. Depending on refcount order, this could lead to use-after-free or double-free when release_mdev() ran (or when unregister paths also performed puts).

Fix by moving the frees of mdev-owned allocations into release_mdev(), so they happen exactly once when the device is truly released, and by dropping the extra put_device() calls in hdm_disconnect() that are redundant after device_unregister() and most_deregister_interface().

This addresses the KASAN slab-use-after-free reported by syzbot in hdm_disconnect(). See report and stack traces in the bug link below.

CVSS v3
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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
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EG Risk
—
EPSS PROB
0%
EPSS %ILE
10%
KEV
Not listed

Published

December 4, 2025

Last Modified

April 15, 2026

References (7)

Patch Availability(30)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.170.159) @ jammy2026-05-21ubuntu
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-oracle-lts-22.04 (5.15.0.1097.93) @ jammy2026-05-21ubuntu
ubuntulinux-tools-gcp-fips-5.15 (5.15.0.1100.90) @ jammy2026-05-21ubuntu
ubuntulinux-tools-oracle-64k-6.17 (6.17.0-1007.7) @ questing2026-05-21ubuntu
ubuntulinux-tools-oem-6.17 (6.17.0-1011.11) @ noble2026-05-21ubuntu
ubuntulinux-tools-aws-edge (5.15.0.1100.107~20.04.1) @ focal2026-05-21ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1064 (5.15.0-1064.68) @ jammy2026-05-21ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1052.52) @ jammy2026-05-21ubuntu
ubuntulinux-tools-azure-lts-22.04 (5.15.0.1109.107) @ jammy2026-05-21ubuntu
ubuntulinux-tools-azure-edge (5.15.0.1110.119~20.04.1) @ focal2026-05-21ubuntu
ubuntulinux-tools-nvidia-tegra-igx-rt-5.15 (5.15.0.1041.43) @ jammy2026-05-21ubuntu
ubuntulinux-tools-nvidia-lowlatency-5.15 (5.15.0.1095.95) @ jammy2026-05-21ubuntu
ubuntulinux-virtual-6.8 (6.8.0-106.106) @ noble2026-05-21ubuntu
ubuntulinux-tools-intel-iotg-5.15 (5.15.0.1095.95) @ jammy2026-05-21ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1052.58+fips1) @ noble2026-05-21ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1029.30) @ noble2026-05-21ubuntu
ubuntulinux-tools-realtime-5.15 (5.15.0.1099.103) @ jammy2026-05-21ubuntu
ubuntulinux-tools-nvidia-hwe-22.04-edge (6.8.0-1049.52~22.04.1) @ jammy2026-05-21ubuntu
ubuntulinux-tools-gcp-fips-6.8 (6.8.0-1052.55+fips1) @ noble2026-05-21ubuntu
ubuntulinux-tools-azure-6.17 (6.17.0-1008.8) @ questing2026-05-21ubuntu
ubuntulinux-tools-realtime-6.8.1 (6.8.1-1045.46) @ noble2026-05-21ubuntu
ubuntulinux-tools-aws-edge (6.8.0-1050.53~22.04.1) @ jammy2026-05-21ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1051.57) @ noble2026-05-21ubuntu
ubuntulinux-tools-azure-edge (6.8.0-1051.57~22.04.1) @ jammy2026-05-21ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2040.41) @ noble2026-05-21ubuntu
ubuntulinux-tools-raspi-nolpae (5.15.0.1097.95) @ jammy2026-05-21ubuntu
ubuntulinux-tools-azure-fips-5.15 (5.15.0.1109.94) @ jammy2026-05-21ubuntu
linuxKernel @ 5.10.246—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

(25)

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 / 37× 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 128 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
  4. 2026-08-02 02:26 UTCEPSS rescore
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  6. 2026-07-30 16:27 UTCEPSS rescore
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  8. 2026-07-28 15:35 UTCEPSS rescore
  9. 2026-07-27 06:39 UTCOSV refresh
  10. 2026-07-26 14:54 UTCEPSS rescore
  11. 2026-07-25 14:17 UTCEPSS rescore
  12. 2026-07-25 14:17 UTCEPSS rescore
  13. 2026-07-24 14:17 UTCEPSS rescore
  14. 2026-07-23 02:55 UTCEG score recompute
  15. 2026-07-22 14:07 UTCEPSS rescore
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  17. 2026-07-21 15:24 UTCEPSS rescore
  18. 2026-07-20 17:07 UTCEPSS rescore
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  25. 2026-07-16 17:02 UTCEPSS rescore
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  1. 2026-07-15 01:59 UTCEPSS rescore
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  5. 2026-07-13 06:12 UTCEPSS rescore
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  7. 2026-07-11 08:27 UTCEPSS rescore
  8. 2026-07-11 08:27 UTCEPSS rescore
  9. 2026-07-10 01:15 UTCOSV refresh
  10. 2026-07-09 19:09 UTCEPSS rescore
  11. 2026-07-09 19:09 UTCEPSS rescore
  12. 2026-07-07 13:45 UTCEPSS rescore
  13. 2026-07-06 16:27 UTCEPSS rescore
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  19. 2026-06-30 23:22 UTCEPSS rescore
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  21. 2026-06-28 14:07 UTCEPSS rescore
  22. 2026-06-28 14:07 UTCEPSS rescore
  23. 2026-06-28 04:55 UTCEPSS rescore
  24. 2026-06-28 04:55 UTCEPSS rescore
  25. 2026-06-27 03:08 UTCEPSS rescore
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  27. 2026-06-25 13:49 UTCEPSS rescore
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  29. 2026-06-24 14:04 UTCEPSS rescore
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  31. 2026-06-23 21:32 UTCEPSS rescore
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  35. 2026-06-21 14:56 UTCEPSS rescore
  36. 2026-06-21 14:56 UTCEPSS rescore
  37. 2026-06-21 11:31 UTCOSV refresh
  38. 2026-06-21 01:59 UTCEPSS rescore
  39. 2026-06-21 01:59 UTCEPSS rescore
  40. 2026-06-19 19:25 UTCEPSS rescore
  41. 2026-06-19 19:25 UTCEPSS rescore
  42. 2026-06-18 17:52 UTCEPSS rescore
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  44. 2026-06-17 17:52 UTCEPSS rescore
  45. 2026-06-16 17:52 UTCEPSS rescore
  46. 2026-06-16 17:52 UTCEPSS rescore
  47. 2026-06-14 23:17 UTCEPSS rescore
  48. 2026-06-13 23:00 UTCEPSS rescore
  49. 2026-06-12 23:11 UTCEPSS rescore
  50. 2026-06-11 14:00 UTCEPSS rescore
  51. 2026-06-10 22:18 UTCEPSS rescore
  52. 2026-06-10 13:22 UTCEPSS rescore
  53. 2026-06-08 14:16 UTCEPSS rescore
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  55. 2026-06-07 15:24 UTCEPSS rescore
  56. 2026-06-06 13:47 UTCEPSS rescore
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  58. 2026-06-05 22:46 UTCEPSS rescore
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  60. 2026-06-05 06:10 UTCEPSS rescore
  61. 2026-06-05 06:10 UTCEPSS rescore
  62. 2026-06-02 20:12 UTCEPSS rescore
  63. 2026-06-02 03:39 UTCOSV refresh
  64. 2026-06-01 13:51 UTCEPSS rescore
  65. 2026-06-01 13:51 UTCEPSS rescore
  66. 2026-05-31 22:30 UTCEPSS rescore
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  68. 2026-05-31 00:16 UTCEPSS rescore
  69. 2026-05-29 13:44 UTCEPSS rescore
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  74. 2026-05-27 13:40 UTCEPSS rescore
  75. 2026-05-27 13:40 UTCEPSS rescore

Related CVEs(same product + same vendor)

Frequently asked(4)

What is CVE-2025-40223?
CVE-2025-40223 is a publicly disclosed vulnerability published on December 4, 2025. In the Linux kernel, the following vulnerability has been resolved: most: usb: Fix use-after-free in hdm_disconnect hdmdisconnect() calls mostderegister_interface(), which eventually unregisters the MOST interface device with device_unregister(iface->dev). If that drops the last reference, the…
When was CVE-2025-40223 disclosed?
CVE-2025-40223 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-2025-40223 actively exploited?
CVE-2025-40223 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 89.7% of all scored CVEs.
How do I remediate CVE-2025-40223?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-40223, 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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