CVE-2026-46065

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

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

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
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:

fbdev: defio: Disconnect deferred I/O from the lifetime of struct fb_info

Hold state of deferred I/O in struct fb_deferred_io_state. Allocate an instance as part of initializing deferred I/O and remove it only after the final mapping has been closed. If the fb_info and the contained deferred I/O meanwhile goes away, clear struct fb_deferred_io_state.info to invalidate the mapping. Any access will then result in a SIGBUS signal.

Fixes a long-standing problem, where a device hot-unplug happens while user space still has an active mapping of the graphics memory. The hot- unplug frees the instance of struct fb_info. Accessing the memory will operate on undefined state.

CVSS v3
7.8
EG Score
7.8(medium)
EPSS
2.9%
KEV
Not listed

Published

May 27, 2026

Last Modified

June 24, 2026

Advisory Details (5)

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

fbdev: defio: Disconnect deferred I/O from the lifetime of struct fb_info - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a0aafb421dd15e935d81543152617f2742cefa70
generic

fbdev: defio: Disconnect deferred I/O from the lifetime of struct fb_info - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9ded47ad003f09a94b6a710b5c47f4aa5ceb7429
generic

fbdev: defio: Disconnect deferred I/O from the lifetime of struct fb_info - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2b53d3a52e8e5403a4f4fb57ac6cad3fd2cb1066
generic

fbdev: defio: Disconnect deferred I/O from the lifetime of struct fb_info - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2a40f8bc9bb713329f1c35ffc199ee961a7135b0
generic

fbdev: defio: Disconnect deferred I/O from the lifetime of struct fb_info - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/25c2b77bc463f29ee71a54b883548baf9386a0db

Vendor Advisories for CVE-2026-46065(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-nvidia-hwe-24.04-edge (7.0.0-1013.13) @ resolute2026-07-11ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1014.14) @ 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 9× in last 7d / 78× 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 185 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. 2026-07-11 23:39 UTCEG score recompute
  6. 2026-07-11 23:39 UTCVendor advisory
  7. 2026-07-11 23:39 UTCGHSA enrichment
  8. 2026-07-11 08:27 UTCEPSS rescore
  9. 2026-07-09 19:10 UTCEPSS rescore
  10. 2026-07-08 23:51 UTCEG score recompute
  11. 2026-07-08 23:51 UTCVendor advisory
  12. 2026-07-08 23:50 UTCGHSA enrichment
  13. 2026-07-08 15:16 UTCEPSS rescore
  14. 2026-07-07 13:46 UTCEPSS rescore
  15. 2026-07-06 16:27 UTCEPSS rescore
  16. 2026-07-06 02:23 UTCEPSS rescore
  17. 2026-07-05 02:30 UTCEPSS rescore
  18. 2026-07-04 06:31 UTCEPSS rescore
  19. 2026-07-01 10:13 UTCEG score recompute
  20. 2026-07-01 10:13 UTCVendor advisory
  21. 2026-07-01 10:13 UTCGHSA enrichment
  22. 2026-06-30 23:22 UTCEPSS rescore
  23. 2026-06-30 03:21 UTCEG score recompute
  24. 2026-06-30 03:21 UTCVendor advisory
  25. 2026-06-30 03:21 UTCGHSA enrichment
Show 75 more
  1. 2026-06-29 14:19 UTCEG score recompute
  2. 2026-06-29 14:19 UTCVendor advisory
  3. 2026-06-29 14:19 UTCGHSA enrichment
  4. 2026-06-29 14:06 UTCEPSS rescore
  5. 2026-06-29 14:06 UTCEPSS rescore
  6. 2026-06-28 20:55 UTCEG score recompute
  7. 2026-06-28 20:55 UTCVendor advisory
  8. 2026-06-28 20:55 UTCGHSA enrichment
  9. 2026-06-28 14:07 UTCEPSS rescore
  10. 2026-06-28 06:43 UTCEG score recompute
  11. 2026-06-28 06:43 UTCVendor advisory
  12. 2026-06-28 06:43 UTCGHSA enrichment
  13. 2026-06-28 04:56 UTCEPSS rescore
  14. 2026-06-28 04:56 UTCEPSS rescore
  15. 2026-06-27 18:29 UTCEG score recompute
  16. 2026-06-27 18:29 UTCVendor advisory
  17. 2026-06-27 18:29 UTCGHSA enrichment
  18. 2026-06-27 05:50 UTCEG score recompute
  19. 2026-06-27 05:50 UTCVendor advisory
  20. 2026-06-27 05:50 UTCGHSA enrichment
  21. 2026-06-27 03:08 UTCEPSS rescore
  22. 2026-06-26 17:06 UTCEG score recompute
  23. 2026-06-26 17:06 UTCVendor advisory
  24. 2026-06-26 17:06 UTCGHSA enrichment
  25. 2026-06-26 02:27 UTCEG score recompute
  26. 2026-06-26 02:27 UTCVendor advisory
  27. 2026-06-26 02:27 UTCGHSA enrichment
  28. 2026-06-25 13:49 UTCEPSS rescore
  29. 2026-06-25 13:09 UTCEG score recompute
  30. 2026-06-25 13:09 UTCVendor advisory
  31. 2026-06-25 13:09 UTCGHSA enrichment
  32. 2026-06-25 01:04 UTCEG score recompute
  33. 2026-06-25 01:04 UTCVendor advisory
  34. 2026-06-25 01:04 UTCGHSA enrichment
  35. 2026-06-24 14:05 UTCEPSS rescore
  36. 2026-06-23 21:33 UTCEPSS rescore
  37. 2026-06-23 21:33 UTCEPSS rescore
  38. 2026-06-22 14:25 UTCEPSS rescore
  39. 2026-06-22 14:25 UTCEPSS rescore
  40. 2026-06-21 14:56 UTCEPSS rescore
  41. 2026-06-21 14:56 UTCEPSS rescore
  42. 2026-06-21 01:59 UTCEPSS rescore
  43. 2026-06-21 01:59 UTCEPSS rescore
  44. 2026-06-19 19:26 UTCEPSS rescore
  45. 2026-06-19 19:26 UTCEPSS rescore
  46. 2026-06-18 17:52 UTCEPSS rescore
  47. 2026-06-18 17:52 UTCEPSS rescore
  48. 2026-06-17 18:42 UTCEG score recompute
  49. 2026-06-17 18:42 UTCGHSA enrichment
  50. 2026-06-17 17:53 UTCEPSS rescore
  51. 2026-06-17 04:14 UTCEG score recompute
  52. 2026-06-17 04:14 UTCGHSA enrichment
  53. 2026-06-16 17:52 UTCEPSS rescore
  54. 2026-06-16 16:07 UTCEG score recompute
  55. 2026-06-16 16:07 UTCVendor advisory
  56. 2026-06-16 16:06 UTCGHSA enrichment
  57. 2026-06-16 02:59 UTCEG score recompute
  58. 2026-06-16 02:59 UTCVendor advisory
  59. 2026-06-16 02:59 UTCGHSA enrichment
  60. 2026-06-15 17:49 UTCEPSS rescore
  61. 2026-06-15 14:56 UTCEG score recompute
  62. 2026-06-15 14:56 UTCVendor advisory
  63. 2026-06-15 14:56 UTCGHSA enrichment
  64. 2026-06-15 02:52 UTCEG score recompute
  65. 2026-06-15 02:52 UTCVendor advisory
  66. 2026-06-15 02:52 UTCGHSA enrichment
  67. 2026-06-14 14:49 UTCEG score recompute
  68. 2026-06-14 14:49 UTCVendor advisory
  69. 2026-06-14 14:49 UTCGHSA enrichment
  70. 2026-06-14 02:47 UTCEG score recompute
  71. 2026-06-14 02:47 UTCVendor advisory
  72. 2026-06-14 02:47 UTCGHSA enrichment
  73. 2026-06-13 23:00 UTCEPSS rescore
  74. 2026-06-13 14:40 UTCEG score recompute
  75. 2026-06-13 14:40 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-46065?
CVE-2026-46065 is a high vulnerability published on May 27, 2026. In the Linux kernel, the following vulnerability has been resolved: fbdev: defio: Disconnect deferred I/O from the lifetime of struct fb_info Hold state of deferred I/O in struct fbdeferredio_state. Allocate an instance as part of initializing deferred I/O and remove it only after the final mapping…
When was CVE-2026-46065 disclosed?
CVE-2026-46065 was first published in the National Vulnerability Database on May 27, 2026, with the most recent update on June 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-46065 actively exploited?
CVE-2026-46065 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-46065?
CVE-2026-46065 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-46065?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-46065, 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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