CVE-2026-31582

HIGHCVSS · not yet scored7.8
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
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS v2: —Exploit: None knownExposed: 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)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity78% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
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.

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
linuxKernel @ 6.12.83—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

(2 across 2 ecosystems)
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 (129 versions)6.19.14-1—

Weakness Classification(1)

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

All Vendor Advisories

(18)

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 / 31× 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 221 total refreshes for this CVE.

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

Related CVEs(same product + same vendor + same CWE)

Frequently asked(4)

What is CVE-2026-31582?
CVE-2026-31582 is a high 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 0% probability of exploitation in the next 30 days, which ranks it in the top 97.5% of all scored CVEs.
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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