CVE-2026-64385

CRITICALPre-NVD 9.89.8
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-25. 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

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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

smb: client: fix double-free in SMB2_ioctl() replay

A response-bearing attempt can return a replayable error and free its response buffer. If SMB2_ioctl_init() fails before the next send, cleanup retains the previous buffer type and frees that response again.

Reset response bookkeeping before each attempt to prevent the stale free.

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 25, 2026

Last Modified

August 17, 2026

Advisory Details (5)

Auto-updated Aug 24, 2026
No patch confirmed yet.
generic

smb: client: fix double-free in SMB2_ioctl() replay - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/fc65ffb4ef1bf540da16b17c225ae51091e07d72
generic

smb: client: fix double-free in SMB2_ioctl() replay - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f9bbadb6c94583e3b4af1afc449bfceb1d1ddec9
generic

smb: client: fix double-free in SMB2_ioctl() replay - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/96fcfc8ae7359346156e492ca610e830d2649ad6
generic

smb: client: fix double-free in SMB2_ioctl() replay - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/276c8efbc49f9303ac76d0d4deab7128581b0f3b
generic

smb: client: fix double-free in SMB2_ioctl() replay - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0be4bc64882edaefaaee8d1e27d083643eb778e6

Vendor Advisories for CVE-2026-64385(2)

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

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux-6.126.12.100-1~deb12u1
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.95-1~bpo12+1 (30 versions)6.12.96-1
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.1~rc7-1~exp1 (156 versions)7.1.4-1

Data Freshness Timeline

(refreshed 62× in last 7d / 319× 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 365 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-64385?
CVE-2026-64385 is a critical vulnerability published on July 25, 2026. In the Linux kernel, the following vulnerability has been resolved: smb: client: fix double-free in SMB2_ioctl() replay A response-bearing attempt can return a replayable error and free its response buffer. If SMB2ioctlinit() fails before the next send, cleanup retains the previous buffer type and…
When was CVE-2026-64385 disclosed?
CVE-2026-64385 was first published in the National Vulnerability Database on July 25, 2026, with the most recent update on August 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-64385 actively exploited?
CVE-2026-64385 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-2026-64385?
CVE-2026-64385 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-64385?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64385, 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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