CVE-2026-46021

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-05-27. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
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:

thermal: core: Fix thermal zone governor cleanup issues

If thermal_zone_device_register_with_trips() fails after adding a thermal governor to the thermal zone being registered, the governor is not removed from it as appropriate which may lead to a memory leak.

In turn, thermal_zone_device_unregister() calls thermal_set_governor() without acquiring the thermal zone lock beforehand which may race with a governor update via sysfs and may lead to a use-after-free in that case.

Address these issues by adding two thermal_set_governor() calls, one to thermal_release() to remove the governor from the given thermal zone, and one to the thermal zone registration error path to cover failures preceding the thermal zone device registration.

CVSS v3
5.5
EG Score
5.5(medium)
EPSS
2.1%
KEV
Not listed

Published

May 27, 2026

Last Modified

June 19, 2026

Advisory Details (5)

Auto-updated Jun 16, 2026
No patch confirmed yet.
generic

thermal: core: Fix thermal zone governor cleanup issues - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f412e541d25a3dfaf3d53e012ade6ff03cae8a45
generic

thermal: core: Fix thermal zone governor cleanup issues - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/75f8f3c3e09122270986de9d7aa347d701676761
generic

thermal: core: Fix thermal zone governor cleanup issues - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/64d4ebf91d082034bbc5ae3ba2d7fd800bc02d06
generic

thermal: core: Fix thermal zone governor cleanup issues - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/41ff66baf81c6541f4f985dd7eac4494d03d9440
generic

thermal: core: Fix thermal zone governor cleanup issues - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/37a430a2d4e66ec8238da6c7f7e48809bf265e13

Vendor Advisories for CVE-2026-46021(2)

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

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-27.27) @ resolute2026-07-11ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1008.8) @ resolute2026-07-11ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1014.14) @ resolute2026-07-11ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1013.13) @ resolute2026-07-11ubuntu

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.

Weakness Classification(1)

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

Additional Vendor Advisories

(4)

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 7× in last 7d / 56× 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. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-13 22:30 UTCEPSS rescore
  3. 2026-07-11 23:50 UTCEG score recompute
  4. 2026-07-11 23:50 UTCVendor advisory
  5. 2026-07-11 23:50 UTCGHSA enrichment
  6. 2026-07-11 08:27 UTCEPSS rescore
  7. 2026-07-09 19:10 UTCEPSS rescore
  8. 2026-07-08 23:59 UTCEG score recompute
  9. 2026-07-08 23:59 UTCVendor advisory
  10. 2026-07-08 23:59 UTCGHSA enrichment
  11. 2026-07-08 15:16 UTCEPSS rescore
  12. 2026-07-07 13:46 UTCEPSS rescore
  13. 2026-07-06 16:27 UTCEPSS rescore
  14. 2026-07-06 02:23 UTCEPSS rescore
  15. 2026-07-01 15:07 UTCEPSS rescore
  16. 2026-07-01 10:27 UTCEG score recompute
  17. 2026-07-01 10:27 UTCVendor advisory
  18. 2026-07-01 10:27 UTCGHSA enrichment
  19. 2026-06-30 23:22 UTCEPSS rescore
  20. 2026-06-29 14:22 UTCEG score recompute
  21. 2026-06-29 14:22 UTCVendor advisory
  22. 2026-06-29 14:22 UTCGHSA enrichment
  23. 2026-06-29 14:06 UTCEPSS rescore
  24. 2026-06-29 14:06 UTCEPSS rescore
  25. 2026-06-28 14:07 UTCEPSS rescore
Show 73 more
  1. 2026-06-28 07:26 UTCEG score recompute
  2. 2026-06-28 07:26 UTCVendor advisory
  3. 2026-06-28 07:26 UTCGHSA enrichment
  4. 2026-06-28 04:56 UTCEPSS rescore
  5. 2026-06-28 04:56 UTCEPSS rescore
  6. 2026-06-27 06:00 UTCEG score recompute
  7. 2026-06-27 06:00 UTCVendor advisory
  8. 2026-06-27 06:00 UTCGHSA enrichment
  9. 2026-06-27 03:08 UTCEPSS rescore
  10. 2026-06-26 02:43 UTCEG score recompute
  11. 2026-06-26 02:43 UTCVendor advisory
  12. 2026-06-26 02:43 UTCGHSA enrichment
  13. 2026-06-25 13:49 UTCEPSS rescore
  14. 2026-06-25 01:20 UTCEG score recompute
  15. 2026-06-25 01:20 UTCVendor advisory
  16. 2026-06-25 01:20 UTCGHSA enrichment
  17. 2026-06-24 14:05 UTCEPSS rescore
  18. 2026-06-23 21:33 UTCEPSS rescore
  19. 2026-06-23 21:33 UTCEPSS rescore
  20. 2026-06-22 14:25 UTCEPSS rescore
  21. 2026-06-22 14:25 UTCEPSS rescore
  22. 2026-06-21 01:59 UTCEPSS rescore
  23. 2026-06-21 01:59 UTCEPSS rescore
  24. 2026-06-19 19:26 UTCEPSS rescore
  25. 2026-06-19 19:26 UTCEPSS rescore
  26. 2026-06-18 17:52 UTCEPSS rescore
  27. 2026-06-18 17:52 UTCEPSS rescore
  28. 2026-06-17 18:44 UTCEG score recompute▲ 5.50
  29. 2026-06-17 18:43 UTCGHSA enrichment
  30. 2026-06-17 17:53 UTCEPSS rescore
  31. 2026-06-16 17:52 UTCEPSS rescore
  32. 2026-06-16 16:16 UTCNVD updateCVSS v3 → 5.5 · severity → MEDIUM
  33. 2026-06-15 17:49 UTCEPSS rescore
  34. 2026-06-14 23:28 UTCMITRE cvelistV5
  35. 2026-06-14 22:38 UTCVendor advisory
  36. 2026-06-14 22:38 UTCGHSA enrichment
  37. 2026-06-13 23:00 UTCEPSS rescore
  38. 2026-06-12 23:12 UTCEPSS rescore
  39. 2026-06-12 23:12 UTCEPSS rescore
  40. 2026-06-12 04:02 UTCVendor advisory
  41. 2026-06-12 04:02 UTCGHSA enrichment
  42. 2026-06-11 14:00 UTCEPSS rescore
  43. 2026-06-10 22:18 UTCEPSS rescore
  44. 2026-06-10 13:22 UTCEPSS rescore
  45. 2026-06-10 13:22 UTCEPSS rescore
  46. 2026-06-09 09:26 UTCGHSA enrichment
  47. 2026-06-08 14:17 UTCEPSS rescore
  48. 2026-06-08 14:17 UTCEPSS rescore
  49. 2026-06-07 15:25 UTCEPSS rescore
  50. 2026-06-07 15:25 UTCEPSS rescore
  51. 2026-06-06 14:49 UTCGHSA enrichment
  52. 2026-06-06 13:47 UTCEPSS rescore
  53. 2026-06-06 13:47 UTCEPSS rescore
  54. 2026-06-05 22:47 UTCEPSS rescore
  55. 2026-06-05 06:10 UTCEPSS rescore
  56. 2026-06-05 06:10 UTCEPSS rescore
  57. 2026-06-04 13:12 UTCEPSS rescore
  58. 2026-06-04 13:12 UTCEPSS rescore
  59. 2026-06-03 20:12 UTCGHSA enrichment
  60. 2026-06-02 20:13 UTCEPSS rescore
  61. 2026-06-01 13:52 UTCEPSS rescore
  62. 2026-06-01 13:52 UTCEPSS rescore
  63. 2026-06-01 01:35 UTCEG score recompute
  64. 2026-06-01 01:35 UTCGHSA enrichment
  65. 2026-05-31 22:30 UTCEPSS rescore
  66. 2026-05-31 22:30 UTCEPSS rescore
  67. 2026-05-31 00:16 UTCEPSS rescore
  68. 2026-05-31 00:16 UTCEPSS rescore
  69. 2026-05-29 13:44 UTCEPSS rescore
  70. 2026-05-29 13:44 UTCEPSS rescore
  71. 2026-05-28 13:44 UTCEPSS rescore
  72. 2026-05-28 13:44 UTCEPSS rescore
  73. 2026-05-27 14:11 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-46021?
CVE-2026-46021 is a medium vulnerability published on May 27, 2026. In the Linux kernel, the following vulnerability has been resolved: thermal: core: Fix thermal zone governor cleanup issues If thermalzonedeviceregisterwith_trips() fails after adding a thermal governor to the thermal zone being registered, the governor is not removed from it as appropriate which…
When was CVE-2026-46021 disclosed?
CVE-2026-46021 was first published in the National Vulnerability Database on May 27, 2026, with the most recent update on June 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-46021 actively exploited?
CVE-2026-46021 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-46021?
CVE-2026-46021 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-46021?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-46021, 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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