CVE-2026-45995

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
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: 7.8Exploit: None knownExposed: 0

A fix is available — apply it.

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

io_uring/zcrx: fix user_struct uaf

io_free_rbuf_ring() usees a struct user_struct, which io_zcrx_ifq_free() puts it down before destroying the ring.

CVSS v3
7.8
EG Score
7.8(medium)
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
2%
KEV
Not listed

Published

May 27, 2026

Last Modified

June 16, 2026

Advisory Details (2)

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

io_uring/zcrx: fix user_struct uaf - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9feb88eeda6d288f93fcfb6bca563f89e316479d
generic

io_uring/zcrx: fix user_struct uaf - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0fcccfd87152f957fa8312b841f6efef42a05a20

Vendor Advisories for CVE-2026-45995(1)

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

Patch Availability(6)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-27.27) @ resolute2026-08-25ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1008.8) @ resolute2026-08-25ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1014.14) @ resolute2026-08-25ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1013.13) @ resolute2026-08-25ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-08-25ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-08-25ubuntu

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

(1 across 1 ecosystem)
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.4-1~bpo13+1 (131 versions)7.0.4-1—

Weakness Classification(1)

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

All Vendor Advisories

(6)

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 4× in last 7d / 85× 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 217 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-45995?
CVE-2026-45995 is a high vulnerability published on May 27, 2026. In the Linux kernel, the following vulnerability has been resolved: iouring/zcrx: fix userstruct uaf iofreerbufring() usees a struct userstruct, which iozcrxifq_free() puts it down before destroying the ring.
When was CVE-2026-45995 disclosed?
CVE-2026-45995 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-2026-45995 actively exploited?
CVE-2026-45995 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 97.9% of all scored CVEs.
What is the CVSS score of CVE-2026-45995?
CVE-2026-45995 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-45995?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45995, 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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