CVE-2026-64061

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-19. the CNA's CVSS baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
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 early put of sink folio in netfs_read_gaps()

Fix netfs_read_gaps() to release the sink page it uses after waiting for the request to complete. The way the sink page is used is that an ITER_BVEC-class iterator is created that has the gaps from the target folio at either end, but has the sink page tiled over the middle so that a single read op can fill in both gaps.

The bug was found by KASAN detecting a UAF on the generic/075 xfstest in the cifsd kernel thread that handles reception of data from the TCP socket:

BUG: KASAN: use-after-free in _copy_to_iter+0x48a/0xa20 Write of size 885 at addr ffff888107f92000 by task cifsd/1285 CPU: 2 UID: 0 PID: 1285 Comm: cifsd Not tainted 7.0.0 #6 PREEMPT(lazy) Call Trace: dump_stack_lvl+0x5d/0x80 print_report+0x17f/0x4f1 kasan_report+0x100/0x1e0 kasan_check_range+0x10f/0x1e0 __asan_memcpy+0x3c/0x60 _copy_to_iter+0x48a/0xa20 __skb_datagram_iter+0x2c9/0x430 skb_copy_datagram_iter+0x6e/0x160 tcp_recvmsg_locked+0xce0/0x1130 tcp_recvmsg+0xeb/0x300 inet_recvmsg+0xcf/0x3a0 sock_recvmsg+0xea/0x100 cifs_readv_from_socket+0x3a6/0x4d0 [cifs] cifs_read_iter_from_socket+0xdd/0x130 [cifs] cifs_readv_receive+0xaad/0xb10 [cifs] cifs_demultiplex_thread+0x1148/0x1740 [cifs] kthread+0x1cf/0x210

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
39%
KEV
Not listed

Published

July 19, 2026

Last Modified

August 5, 2026

Advisory Details (4)

Auto-updated Aug 26, 2026
No patch confirmed yet.
generic

netfs: Fix early put of sink folio in netfs_read_gaps() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3e5dd91b87a8b1450217b56a336bee315f40da7d
generic

netfs: Fix early put of sink folio in netfs_read_gaps() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/412e8bad48967fd34295866636c028befd27d8b9
generic

netfs: Fix early put of sink folio in netfs_read_gaps() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d4f4bc87c76511cf2532448b0fa40c25e894bd7d
generic

netfs: Fix early put of sink folio in netfs_read_gaps() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2a39d49c8d97df8cb8fa80c10859bc1ba7358c6b

Vendor Advisories for CVE-2026-64061(1)

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

Patch Availability(5)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-08-30ubuntu
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) @ resolute2026-08-30ubuntu
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-08-30ubuntu
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
linux6.12.38-1 ... 6.12.94-1~bpo12+1 (27 versions)6.12.94-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (138 versions)7.0.12-1—

All Vendor Advisories

(5)

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 63× in last 7d / 385× 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 463 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-64061?
CVE-2026-64061 is a critical vulnerability published on July 19, 2026. In the Linux kernel, the following vulnerability has been resolved: netfs: Fix early put of sink folio in netfsreadgaps() Fix netfsreadgaps() to release the sink page it uses after waiting for the request to complete. The way the sink page is used is that an ITER_BVEC-class iterator is created that…
When was CVE-2026-64061 disclosed?
CVE-2026-64061 was first published in the National Vulnerability Database on July 19, 2026, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-64061 actively exploited?
CVE-2026-64061 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 61.4% of all scored CVEs.
What is the CVSS score of CVE-2026-64061?
CVE-2026-64061 has a CVSS v4.0 base score of 9.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-64061?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64061, 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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