CVE-2026-64216

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-24. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: None knownExposed: 0

A fix is available — apply it.

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

netfs: Fix potential UAF in netfs_unlock_abandoned_read_pages()

netfs_unlock_abandoned_read_pages(rreq) accesses the index of the folios it is wanting to unlock and compares that to rreq->no_unlock_folio so that it doesn't unlock a folio being read for netfs_perform_write() or netfs_write_begin().

However, given that netfs_unlock_abandoned_read_pages() is called _after_ NETFS_RREQ_IN_PROGRESS is cleared, the one folio that it's not allowed to dereference is the one specified by ->no_unlock_folio as ownership immediately reverts to the caller.

Fix this by storing the folio pointer instead and using that rather than the index. Also fix netfs_unlock_read_folio() where the same applies.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity98% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
38%
KEV
Not listed

Published

July 24, 2026

Last Modified

August 27, 2026

Advisory Details (4)

Auto-updated Aug 27, 2026
No patch confirmed yet.
generic

netfs: Fix potential UAF in netfs_unlock_abandoned_read_pages() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/dbe556972100fabb8e5a1b3d2163831ff07b1e8e
generic

netfs: Fix potential UAF in netfs_unlock_abandoned_read_pages() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d4ae8dba90b89e7bb4d1045d1cb26afbaf13ee5c
generic

netfs: Fix potential UAF in netfs_unlock_abandoned_read_pages() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6080fa3ecfbb4448a3b47368629534c09b6ec750
generic

netfs: Fix potential UAF in netfs_unlock_abandoned_read_pages() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3866d015f33aeedf81338dd99154703bef33faef

Vendor Advisories for CVE-2026-64216(1)

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

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-08-30ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1016.16~24.04.1) @ noble2026-08-30ubuntu
ubuntulinux-tools-nvidia-hwe-26.04 (7.0.0-2016.16) @ resolute2026-08-30ubuntu

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
linux6.12.100-1 ... 7.2~rc5-1~exp1 (160 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (138 versions)7.0.12-1—

Weakness Classification(1)

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

All Vendor Advisories

(3)

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 74× in last 7d / 379× 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 432 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-64216?
CVE-2026-64216 is a critical vulnerability published on July 24, 2026. In the Linux kernel, the following vulnerability has been resolved: netfs: Fix potential UAF in netfsunlockabandonedreadpages() netfsunlockabandonedreadpages(rreq) accesses the index of the folios it is wanting to unlock and compares that to rreq->nounlockfolio so that it doesn't unlock a folio…
When was CVE-2026-64216 disclosed?
CVE-2026-64216 was first published in the National Vulnerability Database on July 24, 2026, with the most recent update on August 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-64216 actively exploited?
CVE-2026-64216 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 62.2% of all scored CVEs.
What is the CVSS score of CVE-2026-64216?
CVE-2026-64216 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-64216?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64216, 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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