CVE-2024-40904

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2024-07-12. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.5Exploit: NoneExposed: 0

A fix is available — apply it.

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

USB: class: cdc-wdm: Fix CPU lockup caused by excessive log messages

The syzbot fuzzer found that the interrupt-URB completion callback in the cdc-wdm driver was taking too long, and the driver's immediate resubmission of interrupt URBs with -EPROTO status combined with the dummy-hcd emulation to cause a CPU lockup:

cdc_wdm 1-1:1.0: nonzero urb status received: -71 cdc_wdm 1-1:1.0: wdm_int_callback - 0 bytes watchdog: BUG: soft lockup - CPU#0 stuck for 26s! [syz-executor782:6625] CPU#0 Utilization every 4s during lockup: #1: 98% system, 0% softirq, 3% hardirq, 0% idle #2: 98% system, 0% softirq, 3% hardirq, 0% idle #3: 98% system, 0% softirq, 3% hardirq, 0% idle #4: 98% system, 0% softirq, 3% hardirq, 0% idle #5: 98% system, 1% softirq, 3% hardirq, 0% idle Modules linked in: irq event stamp: 73096 hardirqs last enabled at (73095): [] console_emit_next_record kernel/printk/printk.c:2935 [inline] hardirqs last enabled at (73095): [] console_flush_all+0x650/0xb74 kernel/printk/printk.c:2994 hardirqs last disabled at (73096): [] __el1_irq arch/arm64/kernel/entry-common.c:533 [inline] hardirqs last disabled at (73096): [] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:551 softirqs last enabled at (73048): [] softirq_handle_end kernel/softirq.c:400 [inline] softirqs last enabled at (73048): [] handle_softirqs+0xa60/0xc34 kernel/softirq.c:582 softirqs last disabled at (73043): [] __do_softirq+0x14/0x20 kernel/softirq.c:588 CPU: 0 PID: 6625 Comm: syz-executor782 Tainted: G W 6.10.0-rc2-syzkaller-g8867bbd4a056 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024

Testing showed that the problem did not occur if the two error messages -- the first two lines above -- were removed; apparently adding material to the kernel log takes a surprisingly large amount of time.

In any case, the best approach for preventing these lockups and to avoid spamming the log with thousands of error messages per second is to ratelimit the two dev_err() calls. Therefore we replace them with dev_err_ratelimited().

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
25(Track)
EG Risk 25/100SSVC: 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
Severity55% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
21.3%
KEV
Not listed

Published

July 12, 2024

Last Modified

November 3, 2025

References (17)

Vendor Advisories for CVE-2024-40904(3)

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

Patch Availability(23)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-lowlatency-hwe-22.04-edge (6.8.0-44.44.1~22.04.1) @ jammy2026-05-23ubuntu
ubuntulinux-virtual-hwe-18.04-edge (5.4.0.195.193) @ focal2026-05-23ubuntu
ubuntulinux-virtual-hwe-18.04-edge (5.4.0.195.215~18.04.1) @ bionic2026-05-23ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k (6.8.0-1013.14.1) @ noble2026-05-23ubuntu
ubuntulinux-tools-azure (6.8.0-1014.16) @ noble2026-05-23ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.4.0-1051 (5.4.0-1051.55) @ focal2026-05-23ubuntu
ubuntulinux-tools-raspi-hwe-18.04-edge (5.4.0.1116.128~18.04.1) @ bionic2026-05-23ubuntu
ubuntulinux-tools-raspi2-hwe-18.04-edge (5.4.0.1116.146) @ focal2026-05-23ubuntu
ubuntulinux-tools-iot (5.4.0.1043.41) @ focal2026-05-23ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.121.121) @ jammy2026-05-23ubuntu
ubuntulinux-tools-lowlatency-hwe-20.04-edge (5.15.0.121.110) @ jammy2026-05-23ubuntu
ubuntulinux-tools-azure-fde-edge (5.15.0.1072.81~20.04.1.49) @ focal2026-05-23ubuntu
ubuntulinux-tools-azure-lts-22.04 (5.15.0.1072.70) @ jammy2026-05-23ubuntu
ubuntulinux-xilinx-zynqmp-tools-host (5.15.0-1035.39) @ jammy2026-05-23ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1067.73~20.04.1) @ focal2026-05-23ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-45.45~22.04.1) @ jammy2026-05-23ubuntu
ubuntulinux-tools-raspi (6.8.0-1011.12) @ noble2026-05-23ubuntu
ubuntulinux-virtual-hwe-24.04-edge (6.8.0-44.44) @ noble2026-05-23ubuntu
ubuntulinux-tools-nvidia-hwe-22.04-edge (6.8.0-1013.14~22.04.1) @ jammy2026-05-23ubuntu
redhatkernel-0:5.14.0-427.42.1.el9_42024-10-30redhat
redhatkernel-0:4.18.0-553.22.1.el8_102024-09-24redhat
redhatkernel-rt-0:4.18.0-553.22.1.rt7.363.el8_102024-09-24redhat
linuxKernel @ 4.19.317—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.

Additional Vendor Advisories

(19)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 10× in last 7d / 43× 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.

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

Related CVEs(same product + same vendor)

Frequently asked(5)

What is CVE-2024-40904?
CVE-2024-40904 is a medium vulnerability published on July 12, 2024. In the Linux kernel, the following vulnerability has been resolved: USB: class: cdc-wdm: Fix CPU lockup caused by excessive log messages The syzbot fuzzer found that the interrupt-URB completion callback in the cdc-wdm driver was taking too long, and the driver's immediate resubmission of interrupt…
When was CVE-2024-40904 disclosed?
CVE-2024-40904 was first published in the National Vulnerability Database on July 12, 2024, with the most recent update on November 3, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-40904 actively exploited?
CVE-2024-40904 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 21.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2024-40904?
CVE-2024-40904 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2024-40904?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-40904, 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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