CVE-2026-64156

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-07-19. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

A fix is available — apply it.

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

netfs, afs: Fix write skipping in dir/link writepages

Fix netfs_write_single() and afs_single_writepages() to better handle a write that would be skipped due to lock contention and WB_SYNC_NONE by returning 1 from netfs_write_single() if it skipped and making afs_single_writepages() skip also. If a skip occurs, the inode must be re-marked as the VFS may have cleared the mark.

This is really only theoretical for directories in netfs_write_single() as the only path to that is through afs_single_writepages() that takes the ->validate_lock around it, thereby serialising it.

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity55% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
2%
KEV
Not listed

Published

July 19, 2026

Last Modified

August 13, 2026

Advisory Details (3)

Auto-updated Aug 13, 2026
No patch confirmed yet.
generic

netfs, afs: Fix write skipping in dir/link writepages - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f91e10435c0dd37c48b1b25e6236284f656ddc0c
generic

netfs, afs: Fix write skipping in dir/link writepages - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9871938f99cc6cb266a77265491660e2375271f5
generic

netfs, afs: Fix write skipping in dir/link writepages - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/77bb293049d61e04c12b24ebbffafaf5ab36af90

Vendor Advisories for CVE-2026-64156(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-oracle-7.0 (7.0.0-1008.8) @ resolute2026-08-30ubuntu
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-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

(1 across 1 ecosystem)
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 22× in last 7d / 81× 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 112 total refreshes for this CVE.

  1. 2026-08-30 02:45 UTCEG score recompute
  2. 2026-08-30 02:45 UTCVendor advisory
  3. 2026-08-30 02:45 UTCGHSA enrichment
  4. 2026-08-30 01:22 UTCEPSS rescore
  5. 2026-08-28 21:42 UTCEPSS rescore
  6. 2026-08-27 23:47 UTCEG score recompute
  7. 2026-08-27 23:47 UTCVendor advisory
  8. 2026-08-27 23:47 UTCGHSA enrichment
  9. 2026-08-26 23:40 UTCEG score recompute
  10. 2026-08-26 23:40 UTCVendor advisory
  11. 2026-08-26 23:40 UTCGHSA enrichment
  12. 2026-08-26 14:46 UTCEPSS rescore
  13. 2026-08-25 23:43 UTCEG score recompute
  14. 2026-08-25 23:43 UTCVendor advisory
  15. 2026-08-25 23:43 UTCGHSA enrichment
  16. 2026-08-25 13:49 UTCEPSS rescore
  17. 2026-08-24 22:59 UTCEG score recompute
  18. 2026-08-24 22:59 UTCVendor advisory
  19. 2026-08-24 22:59 UTCGHSA enrichment
  20. 2026-08-23 23:03 UTCEG score recompute
  21. 2026-08-23 23:03 UTCVendor advisory
  22. 2026-08-23 23:02 UTCGHSA enrichment
  23. 2026-08-23 00:19 UTCEPSS rescore
  24. 2026-08-22 22:44 UTCEG score recompute
  25. 2026-08-22 22:44 UTCVendor advisory
Show 75 more
  1. 2026-08-22 22:44 UTCGHSA enrichment
  2. 2026-08-21 23:49 UTCEPSS rescore
  3. 2026-08-21 22:48 UTCEG score recompute
  4. 2026-08-21 22:48 UTCVendor advisory
  5. 2026-08-21 22:48 UTCGHSA enrichment
  6. 2026-08-20 22:55 UTCEPSS rescore
  7. 2026-08-20 22:52 UTCVendor advisory
  8. 2026-08-20 22:51 UTCGHSA enrichment
  9. 2026-08-19 22:55 UTCEG score recompute
  10. 2026-08-19 22:55 UTCVendor advisory
  11. 2026-08-19 22:55 UTCGHSA enrichment
  12. 2026-08-19 17:04 UTCEPSS rescore
  13. 2026-08-18 19:40 UTCEG score recompute
  14. 2026-08-18 19:40 UTCVendor advisory
  15. 2026-08-18 19:40 UTCGHSA enrichment
  16. 2026-08-18 13:48 UTCEPSS rescore
  17. 2026-08-17 15:01 UTCEG score recompute
  18. 2026-08-17 15:01 UTCVendor advisory
  19. 2026-08-17 15:01 UTCGHSA enrichment
  20. 2026-08-17 13:47 UTCEPSS rescore
  21. 2026-08-16 15:05 UTCEG score recompute
  22. 2026-08-16 15:05 UTCVendor advisory
  23. 2026-08-16 15:05 UTCGHSA enrichment
  24. 2026-08-16 14:56 UTCEPSS rescore
  25. 2026-08-15 15:09 UTCEG score recompute
  26. 2026-08-15 15:09 UTCVendor advisory
  27. 2026-08-15 15:09 UTCGHSA enrichment
  28. 2026-08-15 01:30 UTCEPSS rescore
  29. 2026-08-14 15:12 UTCEG score recompute
  30. 2026-08-14 15:12 UTCVendor advisory
  31. 2026-08-14 15:12 UTCGHSA enrichment
  32. 2026-08-13 22:00 UTCEPSS rescore
  33. 2026-08-13 15:16 UTCEG score recompute▲ 5.50
  34. 2026-08-13 15:16 UTCVendor advisory
  35. 2026-08-13 15:16 UTCGHSA enrichment
  36. 2026-08-13 15:15 UTCNVD updateCVSS v3 → 5.5 · severity → MEDIUM
  37. 2026-08-12 13:51 UTCEPSS rescore
  38. 2026-08-11 17:25 UTCVendor advisory
  39. 2026-08-11 17:25 UTCGHSA enrichment
  40. 2026-08-11 00:00 UTCEPSS rescore
  41. 2026-08-09 13:47 UTCEPSS rescore
  42. 2026-08-08 16:44 UTCVendor advisory
  43. 2026-08-08 16:44 UTCGHSA enrichment
  44. 2026-08-08 16:37 UTCEPSS rescore
  45. 2026-08-06 13:47 UTCEPSS rescore
  46. 2026-08-05 19:17 UTCEPSS rescore
  47. 2026-08-05 19:17 UTCEPSS rescore
  48. 2026-08-05 16:15 UTCVendor advisory
  49. 2026-08-05 16:15 UTCGHSA enrichment
  50. 2026-08-04 15:10 UTCEPSS rescore
  51. 2026-08-04 10:39 UTCEPSS rescore
  52. 2026-08-03 10:36 UTCEPSS rescore
  53. 2026-08-02 15:48 UTCVendor advisory
  54. 2026-08-02 15:48 UTCGHSA enrichment
  55. 2026-08-02 02:27 UTCEPSS rescore
  56. 2026-08-01 04:16 UTCEPSS rescore
  57. 2026-07-30 16:28 UTCEPSS rescore
  58. 2026-07-30 15:20 UTCEG score recompute
  59. 2026-07-30 15:20 UTCVendor advisory
  60. 2026-07-30 15:19 UTCGHSA enrichment
  61. 2026-07-30 01:30 UTCEPSS rescore
  62. 2026-07-30 01:30 UTCEPSS rescore
  63. 2026-07-29 11:20 UTCGHSA enrichment
  64. 2026-07-28 15:37 UTCEPSS rescore
  65. 2026-07-27 14:14 UTCEPSS rescore
  66. 2026-07-26 14:54 UTCEPSS rescore
  67. 2026-07-26 14:54 UTCEPSS rescore
  68. 2026-07-26 10:52 UTCEG score recompute
  69. 2026-07-26 10:52 UTCVendor advisory
  70. 2026-07-26 10:52 UTCGHSA enrichment
  71. 2026-07-25 14:18 UTCEPSS rescore
  72. 2026-07-25 14:18 UTCEPSS rescore
  73. 2026-07-24 14:18 UTCEPSS rescore
  74. 2026-07-24 14:18 UTCEPSS rescore
  75. 2026-07-23 14:18 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-64156?
CVE-2026-64156 is a medium vulnerability published on July 19, 2026. In the Linux kernel, the following vulnerability has been resolved: netfs, afs: Fix write skipping in dir/link writepages Fix netfswritesingle() and afssinglewritepages() to better handle a write that would be skipped due to lock contention and WBSYNCNONE by returning 1 from netfswritesingle() if…
When was CVE-2026-64156 disclosed?
CVE-2026-64156 was first published in the National Vulnerability Database on July 19, 2026, with the most recent update on August 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-64156 actively exploited?
CVE-2026-64156 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-2026-64156?
CVE-2026-64156 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-64156?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64156, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-64156

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