CVE-2026-43427

HIGHNVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-05-08. NVD baseline CVSS 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.1Exploit: None knownExposed: 0

A fix is available — apply it.

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

usb: class: cdc-wdm: fix reordering issue in read code path

Quoting the bug report:

Due to compiler optimization or CPU out-of-order execution, the desc->length update can be reordered before the memmove. If this happens, wdm_read() can see the new length and call copy_to_user() on uninitialized memory. This also violates LKMM data race rules [1].

Fix it by using WRITE_ONCE and memory barriers.

CVSS v3
7.1
EG Score
7.1(medium)
EG Risk
37(Track)
EG Risk 37/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity71% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

May 8, 2026

Last Modified

May 20, 2026

Advisory Details (8)

Auto-updated Jun 11, 2026
No patch confirmed yet.
generic

usb: class: cdc-wdm: fix reordering issue in read code path - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e3c874b05901dc519054b5107d16620e6d2b5fea
generic

usb: class: cdc-wdm: fix reordering issue in read code path - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c8fa96ed021923dae147bcd9f9205b8df7b82360
generic

usb: class: cdc-wdm: fix reordering issue in read code path - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8df672bfe3ec2268c2636584202755898e547173
generic

usb: class: cdc-wdm: fix reordering issue in read code path - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/67ed312124bb1b61858778ac0b985b48961c862a
generic

usb: class: cdc-wdm: fix reordering issue in read code path - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/638328ca9c17ae6511ad62198c57bae32ffa3c91
generic

usb: class: cdc-wdm: fix reordering issue in read code path - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4ee3062bf2c9a722afef429826e8607eaf3fc6a0
generic

usb: class: cdc-wdm: fix reordering issue in read code path - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/276aef0fd2b92f41b920ac891c72cadeee957934
generic

usb: class: cdc-wdm: fix reordering issue in read code path - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/170e8daca24da6edb4be82ab01abf44e87af387b

Vendor Advisories for CVE-2026-43427(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(27)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1075 (5.15.0-1075.79) @ jammy2026-08-23ubuntu
ubuntulinux-tools-gcp-fips-6.8 (6.8.0-1064.72+fips1) @ noble2026-08-23ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2050.52) @ noble2026-08-23ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1063.71) @ noble2026-08-23ubuntu
ubuntulinux-tools-oracle-lts-24.04 (6.8.0-1058.61) @ noble2026-08-23ubuntu
ubuntulinux-tools-nvidia-hwe-22.04-edge (6.8.0-1059.62~22.04.1) @ jammy2026-08-23ubuntu
ubuntulinux-tools-aws-fips-6.8 (6.8.0-1061.64+fips1) @ noble2026-08-23ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1033.34) @ noble2026-08-23ubuntu
ubuntulinux-virtual-6.8 (6.8.0-136.136) @ noble2026-08-23ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.66~20.04.1) @ focal2026-08-23ubuntu
ubuntulinux-tools-intel-iot-realtime-5.15 (5.15.0.1104.108) @ jammy2026-08-23ubuntu
ubuntulinux-tools-gcp-edge (5.15.0.1112.122~20.04.1) @ focal2026-08-23ubuntu
ubuntulinux-tools-intel-iotg-5.15 (5.15.0.1107.106) @ jammy2026-08-23ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1109.115~20.04.1) @ focal2026-08-23ubuntu
ubuntulinux-tools-azure-fips-5.15 (5.15.0.1117.102) @ jammy2026-08-23ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1058.61~22.04.1) @ jammy2026-08-23ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-08-23ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-136.136~22.04.1) @ jammy2026-08-23ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-08-23ubuntu
ubuntulinux-tools-oracle-lts-22.04 (5.15.0.1109.105) @ jammy2026-08-23ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1063.71+fips2) @ noble2026-08-23ubuntu
ubuntulinux-tools-azure-fde-lts-22.04 (5.15.0.1117.126) @ jammy2026-08-23ubuntu
ubuntulinux-tools-ibm-edge (5.15.0.1106.110~20.04.1) @ focal2026-08-23ubuntu
ubuntulinux-tools-nvidia-lowlatency-5.15 (5.15.0.1107.107) @ jammy2026-08-23ubuntu
ubuntulinux-tools-aws-lts-24.04 (6.8.0-1061.64+1) @ noble2026-08-23ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.64) @ jammy2026-08-23ubuntu
linuxKernel @ 5.10.253—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.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 5.10.92-2 (53 versions)5.10.257-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (48 versions)6.1.170-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.85-1~bpo12+1 (17 versions)6.12.85-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 6.19~rc8-1~exp1 (119 versions)6.19.10-1—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

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 5× in last 7d / 70× 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 201 total refreshes for this CVE.

  1. 2026-09-04 05:06 UTCEPSS rescore
  2. 2026-09-02 14:12 UTCEPSS rescore
  3. 2026-09-01 13:54 UTCEPSS rescore
  4. 2026-08-30 19:17 UTCEPSS rescore
  5. 2026-08-30 01:22 UTCEPSS rescore
  6. 2026-08-28 21:41 UTCEPSS rescore
  7. 2026-08-27 14:25 UTCEPSS rescore
  8. 2026-08-26 14:46 UTCEPSS rescore
  9. 2026-08-25 13:49 UTCEPSS rescore
  10. 2026-08-23 19:06 UTCEG score recompute
  11. 2026-08-23 19:06 UTCVendor advisory
  12. 2026-08-23 19:06 UTCGHSA enrichment
  13. 2026-08-23 00:19 UTCEPSS rescore
  14. 2026-08-21 23:49 UTCEPSS rescore
  15. 2026-08-20 22:55 UTCEPSS rescore
  16. 2026-08-19 17:04 UTCEPSS rescore
  17. 2026-08-18 13:48 UTCEPSS rescore
  18. 2026-08-17 13:47 UTCEPSS rescore
  19. 2026-08-17 11:31 UTCEG score recompute
  20. 2026-08-17 11:31 UTCVendor advisory
  21. 2026-08-17 11:31 UTCGHSA enrichment
  22. 2026-08-16 14:56 UTCEPSS rescore
  23. 2026-08-16 04:34 UTCEG score recompute
  24. 2026-08-16 04:34 UTCVendor advisory
  25. 2026-08-16 04:34 UTCGHSA enrichment
Show 75 more
  1. 2026-08-16 02:14 UTCEPSS rescore
  2. 2026-08-15 01:30 UTCEPSS rescore
  3. 2026-08-14 14:54 UTCVendor advisory
  4. 2026-08-14 14:54 UTCGHSA enrichment
  5. 2026-08-14 03:08 UTCEG score recompute
  6. 2026-08-14 03:08 UTCVendor advisory
  7. 2026-08-14 03:08 UTCGHSA enrichment
  8. 2026-08-13 22:00 UTCEPSS rescore
  9. 2026-08-13 04:29 UTCVendor advisory
  10. 2026-08-13 04:29 UTCGHSA enrichment
  11. 2026-08-12 16:44 UTCEG score recompute
  12. 2026-08-12 16:44 UTCVendor advisory
  13. 2026-08-12 16:44 UTCGHSA enrichment
  14. 2026-08-12 13:51 UTCEPSS rescore
  15. 2026-08-11 15:52 UTCVendor advisory
  16. 2026-08-11 15:51 UTCGHSA enrichment
  17. 2026-08-11 01:26 UTCEG score recompute
  18. 2026-08-11 01:26 UTCVendor advisory
  19. 2026-08-11 01:26 UTCGHSA enrichment
  20. 2026-08-11 00:00 UTCEPSS rescore
  21. 2026-08-10 13:41 UTCVendor advisory
  22. 2026-08-10 13:41 UTCGHSA enrichment
  23. 2026-08-10 01:55 UTCVendor advisory
  24. 2026-08-10 01:55 UTCGHSA enrichment
  25. 2026-08-09 14:10 UTCEG score recompute
  26. 2026-08-09 14:10 UTCVendor advisory
  27. 2026-08-09 14:09 UTCGHSA enrichment
  28. 2026-08-09 13:46 UTCEPSS rescore
  29. 2026-08-09 02:24 UTCEG score recompute
  30. 2026-08-09 02:24 UTCVendor advisory
  31. 2026-08-09 02:24 UTCGHSA enrichment
  32. 2026-08-08 16:37 UTCEPSS rescore
  33. 2026-08-08 13:01 UTCVendor advisory
  34. 2026-08-08 13:01 UTCGHSA enrichment
  35. 2026-08-08 01:15 UTCEG score recompute
  36. 2026-08-08 01:15 UTCVendor advisory
  37. 2026-08-08 01:15 UTCGHSA enrichment
  38. 2026-08-07 13:29 UTCVendor advisory
  39. 2026-08-07 13:29 UTCGHSA enrichment
  40. 2026-08-07 01:43 UTCEG score recompute
  41. 2026-08-07 01:43 UTCVendor advisory
  42. 2026-08-07 01:43 UTCGHSA enrichment
  43. 2026-08-06 13:46 UTCEPSS rescore
  44. 2026-08-06 10:08 UTCVendor advisory
  45. 2026-08-06 10:08 UTCGHSA enrichment
  46. 2026-08-05 22:08 UTCEG score recompute
  47. 2026-08-05 22:08 UTCVendor advisory
  48. 2026-08-05 22:08 UTCGHSA enrichment
  49. 2026-08-05 19:17 UTCEPSS rescore
  50. 2026-08-04 10:38 UTCEPSS rescore
  51. 2026-08-03 19:31 UTCEG score recompute
  52. 2026-08-03 19:31 UTCVendor advisory
  53. 2026-08-03 19:31 UTCGHSA enrichment
  54. 2026-08-03 10:36 UTCEPSS rescore
  55. 2026-08-03 02:19 UTCVendor advisory
  56. 2026-08-03 02:19 UTCGHSA enrichment
  57. 2026-08-02 14:33 UTCVendor advisory
  58. 2026-08-02 14:33 UTCGHSA enrichment
  59. 2026-08-02 02:47 UTCEG score recompute
  60. 2026-08-02 02:47 UTCVendor advisory
  61. 2026-08-02 02:47 UTCGHSA enrichment
  62. 2026-08-02 02:27 UTCEPSS rescore
  63. 2026-08-01 04:16 UTCEPSS rescore
  64. 2026-07-30 16:28 UTCEPSS rescore
  65. 2026-07-30 01:30 UTCEPSS rescore
  66. 2026-07-28 15:36 UTCEPSS rescore
  67. 2026-07-27 14:13 UTCEPSS rescore
  68. 2026-07-25 14:18 UTCEPSS rescore
  69. 2026-07-24 14:17 UTCEPSS rescore
  70. 2026-07-23 14:18 UTCEPSS rescore
  71. 2026-07-23 03:14 UTCEG score recompute
  72. 2026-07-22 14:08 UTCEPSS rescore
  73. 2026-07-21 15:24 UTCEPSS rescore
  74. 2026-07-20 17:08 UTCEPSS rescore
  75. 2026-07-19 14:31 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-43427?
CVE-2026-43427 is a high vulnerability published on May 8, 2026. In the Linux kernel, the following vulnerability has been resolved: usb: class: cdc-wdm: fix reordering issue in read code path Quoting the bug report: Due to compiler optimization or CPU out-of-order execution, the desc->length update can be reordered before the memmove. If this happens, wdmread()…
When was CVE-2026-43427 disclosed?
CVE-2026-43427 was first published in the National Vulnerability Database on May 8, 2026, with the most recent update on May 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43427 actively exploited?
CVE-2026-43427 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 96.9% of all scored CVEs.
What is the CVSS score of CVE-2026-43427?
CVE-2026-43427 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-43427?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43427, 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.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-43427

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