CVE-2026-31582

NVD 0.07.8▲
EchelonGraph scoreLOW confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-04-24.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa
0.0
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No confirmed exploitation signals yet
CISA-KEV: Not listedEPSS: 0%CVSS: —Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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

hwmon: (powerz) Fix use-after-free on USB disconnect

After powerz_disconnect() frees the URB and releases the mutex, a subsequent powerz_read() call can acquire the mutex and call powerz_read_data(), which dereferences the freed URB pointer.

Fix by:

  • Setting priv->urb to NULL in powerz_disconnect() so that
powerz_read_data() can detect the disconnected state.
  • Adding a !priv->urb check at the start of powerz_read_data()
to return -ENODEV on a disconnected device.
  • Moving usb_set_intfdata() before hwmon registration so the
disconnect handler can always find the priv pointer.

CVSS v3
—
EG Score
7.8(low)
EPSS
2.6%
KEV
Not listed

Published

April 24, 2026

Last Modified

June 14, 2026

Advisory Details (5)

Auto-updated Jun 5, 2026
No patch confirmed yet.
generic

hwmon: (powerz) Fix use-after-free on USB disconnect - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c78e1d4e48f23792adaa7c94251e22b0d9700a39
generic

hwmon: (powerz) Fix use-after-free on USB disconnect - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9e1b798257f96d2e2a2639830eb71add545ce749
generic

hwmon: (powerz) Fix use-after-free on USB disconnect - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/7003ae4810ca83f0ddca85b768500e313c4b998c
generic

hwmon: (powerz) Fix use-after-free on USB disconnect - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/61f2aa23b0ce8d7aa5071ed25a7471e246a4fdd4
generic

hwmon: (powerz) Fix use-after-free on USB disconnect - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/08e57f5e1a9067d5fbf33993aa7f51d60b3d13a4

Vendor Advisories for CVE-2026-31582(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 36× 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. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 16:57 UTCEPSS rescore
  3. 2026-07-15 02:00 UTCEPSS rescore
  4. 2026-07-15 02:00 UTCEPSS rescore
  5. 2026-07-13 22:30 UTCEPSS rescore
  6. 2026-07-12 05:46 UTCEPSS rescore
  7. 2026-07-11 08:27 UTCEPSS rescore
  8. 2026-07-09 19:10 UTCEPSS rescore
  9. 2026-07-08 15:15 UTCEPSS rescore
  10. 2026-07-07 13:46 UTCEPSS rescore
  11. 2026-07-06 16:27 UTCEPSS rescore
  12. 2026-07-06 16:27 UTCEPSS rescore
  13. 2026-07-06 02:23 UTCEPSS rescore
  14. 2026-07-06 02:23 UTCEPSS rescore
  15. 2026-06-29 14:06 UTCEPSS rescore
  16. 2026-06-29 14:06 UTCEPSS rescore
  17. 2026-06-28 14:07 UTCEPSS rescore
  18. 2026-06-28 14:07 UTCEPSS rescore
  19. 2026-06-28 04:56 UTCEPSS rescore
  20. 2026-06-28 04:56 UTCEPSS rescore
  21. 2026-06-27 03:08 UTCEPSS rescore
  22. 2026-06-25 13:49 UTCEPSS rescore
  23. 2026-06-25 13:49 UTCEPSS rescore
  24. 2026-06-23 21:33 UTCEPSS rescore
  25. 2026-06-23 21:33 UTCEPSS rescore
Show 75 more
  1. 2026-06-22 14:25 UTCEPSS rescore
  2. 2026-06-22 14:25 UTCEPSS rescore
  3. 2026-06-21 14:56 UTCEPSS rescore
  4. 2026-06-21 14:56 UTCEPSS rescore
  5. 2026-06-21 01:59 UTCEPSS rescore
  6. 2026-06-19 19:25 UTCEPSS rescore
  7. 2026-06-19 19:25 UTCEPSS rescore
  8. 2026-06-18 17:52 UTCEPSS rescore
  9. 2026-06-18 17:52 UTCEPSS rescore
  10. 2026-06-17 17:53 UTCEPSS rescore
  11. 2026-06-16 17:52 UTCEPSS rescore
  12. 2026-06-15 17:49 UTCEPSS rescore
  13. 2026-06-15 02:08 UTCEG score recompute
  14. 2026-06-15 02:08 UTCGHSA enrichment
  15. 2026-06-14 23:28 UTCMITRE cvelistV5
  16. 2026-06-14 23:18 UTCEPSS rescore
  17. 2026-06-14 11:57 UTCEG score recompute
  18. 2026-06-14 11:56 UTCGHSA enrichment
  19. 2026-06-13 23:00 UTCEPSS rescore
  20. 2026-06-12 23:12 UTCEPSS rescore
  21. 2026-06-12 23:12 UTCEPSS rescore
  22. 2026-06-12 03:17 UTCEG score recompute
  23. 2026-06-12 03:17 UTCGHSA enrichment
  24. 2026-06-11 14:04 UTCEG score recompute
  25. 2026-06-11 14:04 UTCGHSA enrichment
  26. 2026-06-11 14:00 UTCEPSS rescore
  27. 2026-06-10 22:18 UTCEPSS rescore
  28. 2026-06-10 16:29 UTCEG score recompute
  29. 2026-06-10 16:29 UTCGHSA enrichment
  30. 2026-06-10 03:17 UTCEG score recompute
  31. 2026-06-10 03:17 UTCGHSA enrichment
  32. 2026-06-09 14:05 UTCEG score recompute
  33. 2026-06-09 14:05 UTCGHSA enrichment
  34. 2026-06-09 00:54 UTCEG score recompute
  35. 2026-06-09 00:54 UTCGHSA enrichment
  36. 2026-06-08 14:17 UTCEPSS rescore
  37. 2026-06-08 14:17 UTCEPSS rescore
  38. 2026-06-08 11:16 UTCEG score recompute
  39. 2026-06-08 11:16 UTCGHSA enrichment
  40. 2026-06-07 22:05 UTCEG score recompute
  41. 2026-06-07 22:05 UTCGHSA enrichment
  42. 2026-06-07 15:25 UTCEPSS rescore
  43. 2026-06-07 15:25 UTCEPSS rescore
  44. 2026-06-07 15:25 UTCEPSS rescore
  45. 2026-06-07 08:51 UTCEG score recompute
  46. 2026-06-07 08:51 UTCGHSA enrichment
  47. 2026-06-06 19:38 UTCEG score recompute
  48. 2026-06-06 19:38 UTCGHSA enrichment
  49. 2026-06-06 13:47 UTCEPSS rescore
  50. 2026-06-06 13:47 UTCEPSS rescore
  51. 2026-06-06 05:38 UTCEG score recompute
  52. 2026-06-06 05:38 UTCGHSA enrichment
  53. 2026-06-05 22:47 UTCEPSS rescore
  54. 2026-06-05 22:47 UTCEPSS rescore
  55. 2026-06-05 16:26 UTCEG score recompute
  56. 2026-06-05 16:26 UTCGHSA enrichment
  57. 2026-06-05 06:10 UTCEPSS rescore
  58. 2026-06-05 06:10 UTCEPSS rescore
  59. 2026-06-05 03:14 UTCEG score recompute
  60. 2026-06-05 03:14 UTCGHSA enrichment
  61. 2026-06-04 14:02 UTCEG score recompute
  62. 2026-06-04 14:02 UTCGHSA enrichment
  63. 2026-06-04 13:12 UTCEPSS rescore
  64. 2026-06-04 13:12 UTCEPSS rescore
  65. 2026-06-04 00:48 UTCEG score recompute
  66. 2026-06-04 00:48 UTCGHSA enrichment
  67. 2026-06-03 11:36 UTCEG score recompute
  68. 2026-06-03 11:36 UTCGHSA enrichment
  69. 2026-06-02 20:13 UTCEPSS rescore
  70. 2026-06-02 20:13 UTCEPSS rescore
  71. 2026-06-02 16:05 UTCEG score recompute
  72. 2026-06-02 16:05 UTCGHSA enrichment
  73. 2026-06-02 02:53 UTCEG score recompute
  74. 2026-06-02 02:53 UTCGHSA enrichment
  75. 2026-06-01 13:51 UTCEPSS rescore

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Frequently asked(4)

What is CVE-2026-31582?
CVE-2026-31582 is a publicly disclosed vulnerability published on April 24, 2026. In the Linux kernel, the following vulnerability has been resolved: hwmon: (powerz) Fix use-after-free on USB disconnect After powerz_disconnect() frees the URB and releases the mutex, a subsequent powerz_read() call can acquire the mutex and call powerzreaddata(), which dereferences the freed URB…
When was CVE-2026-31582 disclosed?
CVE-2026-31582 was first published in the National Vulnerability Database on April 24, 2026, with the most recent update on June 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-31582 actively exploited?
CVE-2026-31582 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2026-31582?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-31582, 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

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