CVE-2026-45989

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-05-27. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.8Exploit: NoneExposed: 0

A fix is available — apply it.

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

of: unittest: fix use-after-free in testdrv_probe()

The function testdrv_probe() retrieves the device_node from the PCI device, applies an overlay, and then immediately calls of_node_put(dn). This releases the reference held by the PCI core, potentially freeing the node if the reference count drops to zero. Later, the same freed pointer 'dn' is passed to of_platform_default_populate(), leading to a use-after-free.

The reference to pdev->dev.of_node is owned by the device model and should not be released by the driver. Remove the erroneous of_node_put() to prevent premature freeing.

CVSS v3
7.8
EG Score
7.8(medium)
EPSS
5.9%
KEV
Not listed

Published

May 27, 2026

Last Modified

June 16, 2026

Advisory Details (5)

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

of: unittest: fix use-after-free in testdrv_probe() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d68347b07b9801791c9eaab8f772770b52b8cd5c
generic

of: unittest: fix use-after-free in testdrv_probe() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6b2023286d2c6ed3bf964fb92e34c9c14d42eb69
generic

of: unittest: fix use-after-free in testdrv_probe() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5b6122a67a295f8a08b7c18d908a1bd974dfaec8
generic

of: unittest: fix use-after-free in testdrv_probe() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0ba03e06f037df704d9b032e36d417633e2326bc
generic

of: unittest: fix use-after-free in testdrv_probe() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/07fd339b2c253205794bea5d9b4b7548a4546c56

Vendor Advisories for CVE-2026-45989(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 10× in last 7d / 82× 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 122 total refreshes for this CVE.

  1. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 02:00 UTCEPSS rescore
  3. 2026-07-13 22:30 UTCEPSS rescore
  4. 2026-07-13 06:13 UTCEPSS rescore
  5. 2026-07-12 05:46 UTCEPSS rescore
  6. 2026-07-11 23:57 UTCEG score recompute
  7. 2026-07-11 23:57 UTCVendor advisory
  8. 2026-07-11 23:57 UTCGHSA enrichment
  9. 2026-07-11 08:27 UTCEPSS rescore
  10. 2026-07-09 19:10 UTCEPSS rescore
  11. 2026-07-09 00:04 UTCEG score recompute
  12. 2026-07-09 00:04 UTCVendor advisory
  13. 2026-07-09 00:03 UTCGHSA enrichment
  14. 2026-07-08 15:16 UTCEPSS rescore
  15. 2026-07-07 13:46 UTCEPSS rescore
  16. 2026-07-06 16:27 UTCEPSS rescore
  17. 2026-07-06 02:23 UTCEPSS rescore
  18. 2026-07-04 06:31 UTCEPSS rescore
  19. 2026-07-01 15:07 UTCEPSS rescore
  20. 2026-07-01 11:09 UTCEG score recompute
  21. 2026-07-01 11:09 UTCVendor advisory
  22. 2026-07-01 11:09 UTCGHSA enrichment
  23. 2026-06-30 23:22 UTCEPSS rescore
  24. 2026-06-30 03:26 UTCEG score recompute
  25. 2026-06-30 03:26 UTCVendor advisory
Show 75 more
  1. 2026-06-30 03:26 UTCGHSA enrichment
  2. 2026-06-29 14:26 UTCEG score recompute
  3. 2026-06-29 14:26 UTCVendor advisory
  4. 2026-06-29 14:26 UTCGHSA enrichment
  5. 2026-06-29 14:06 UTCEPSS rescore
  6. 2026-06-29 14:06 UTCEPSS rescore
  7. 2026-06-28 21:02 UTCEG score recompute
  8. 2026-06-28 21:02 UTCVendor advisory
  9. 2026-06-28 21:02 UTCGHSA enrichment
  10. 2026-06-28 14:07 UTCEPSS rescore
  11. 2026-06-28 06:44 UTCEG score recompute
  12. 2026-06-28 06:44 UTCVendor advisory
  13. 2026-06-28 06:44 UTCGHSA enrichment
  14. 2026-06-28 04:56 UTCEPSS rescore
  15. 2026-06-28 04:56 UTCEPSS rescore
  16. 2026-06-27 18:32 UTCEG score recompute
  17. 2026-06-27 18:32 UTCVendor advisory
  18. 2026-06-27 18:32 UTCGHSA enrichment
  19. 2026-06-27 06:05 UTCEG score recompute
  20. 2026-06-27 06:05 UTCVendor advisory
  21. 2026-06-27 06:05 UTCGHSA enrichment
  22. 2026-06-27 03:08 UTCEPSS rescore
  23. 2026-06-26 17:11 UTCEG score recompute
  24. 2026-06-26 17:11 UTCVendor advisory
  25. 2026-06-26 17:11 UTCGHSA enrichment
  26. 2026-06-26 02:33 UTCEG score recompute
  27. 2026-06-26 02:33 UTCVendor advisory
  28. 2026-06-26 02:33 UTCGHSA enrichment
  29. 2026-06-25 13:49 UTCEPSS rescore
  30. 2026-06-25 13:16 UTCEG score recompute
  31. 2026-06-25 13:16 UTCVendor advisory
  32. 2026-06-25 13:16 UTCGHSA enrichment
  33. 2026-06-25 01:28 UTCEG score recompute
  34. 2026-06-25 01:28 UTCVendor advisory
  35. 2026-06-25 01:28 UTCGHSA enrichment
  36. 2026-06-24 14:05 UTCEPSS rescore
  37. 2026-06-23 21:33 UTCEPSS rescore
  38. 2026-06-23 21:33 UTCEPSS rescore
  39. 2026-06-22 14:25 UTCEPSS rescore
  40. 2026-06-22 14:25 UTCEPSS rescore
  41. 2026-06-21 14:56 UTCEPSS rescore
  42. 2026-06-21 14:56 UTCEPSS rescore
  43. 2026-06-21 01:59 UTCEPSS rescore
  44. 2026-06-21 01:59 UTCEPSS rescore
  45. 2026-06-19 19:26 UTCEPSS rescore
  46. 2026-06-19 19:26 UTCEPSS rescore
  47. 2026-06-18 17:52 UTCEPSS rescore
  48. 2026-06-18 17:52 UTCEPSS rescore
  49. 2026-06-17 18:43 UTCEG score recompute
  50. 2026-06-17 18:43 UTCGHSA enrichment
  51. 2026-06-17 17:53 UTCEPSS rescore
  52. 2026-06-17 04:54 UTCEG score recompute
  53. 2026-06-17 04:54 UTCGHSA enrichment
  54. 2026-06-16 17:52 UTCEPSS rescore
  55. 2026-06-16 17:08 UTCEG score recompute▲ 7.80
  56. 2026-06-16 17:08 UTCVendor advisory
  57. 2026-06-16 17:07 UTCGHSA enrichment
  58. 2026-06-16 14:16 UTCNVD updateCVSS v3 → 7.8 · severity → HIGH
  59. 2026-06-15 17:49 UTCEPSS rescore
  60. 2026-06-14 23:28 UTCMITRE cvelistV5
  61. 2026-06-13 23:00 UTCEPSS rescore
  62. 2026-06-13 14:00 UTCGHSA enrichment
  63. 2026-06-12 23:12 UTCEPSS rescore
  64. 2026-06-12 23:12 UTCEPSS rescore
  65. 2026-06-11 14:00 UTCEPSS rescore
  66. 2026-06-10 22:18 UTCEPSS rescore
  67. 2026-06-10 13:22 UTCEPSS rescore
  68. 2026-06-10 13:22 UTCEPSS rescore
  69. 2026-06-10 10:52 UTCVendor advisory
  70. 2026-06-10 10:52 UTCGHSA enrichment
  71. 2026-06-08 14:17 UTCEPSS rescore
  72. 2026-06-08 14:17 UTCEPSS rescore
  73. 2026-06-07 15:25 UTCEPSS rescore
  74. 2026-06-07 15:25 UTCEPSS rescore
  75. 2026-06-07 07:47 UTCGHSA enrichment

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Frequently asked(5)

What is CVE-2026-45989?
CVE-2026-45989 is a high vulnerability published on May 27, 2026. In the Linux kernel, the following vulnerability has been resolved: of: unittest: fix use-after-free in testdrv_probe() The function testdrvprobe() retrieves the devicenode from the PCI device, applies an overlay, and then immediately calls ofnodeput(dn). This releases the reference held by the PCI…
When was CVE-2026-45989 disclosed?
CVE-2026-45989 was first published in the National Vulnerability Database on May 27, 2026, with the most recent update on June 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-45989 actively exploited?
CVE-2026-45989 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 5.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-45989?
CVE-2026-45989 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-45989?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45989, 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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