CVE-2026-64382

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-25. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: None knownExposed: 0

A fix is available — apply it.

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

smb: client: fix double-free in SMB2_open() replay

A response-bearing attempt can return a replayable error and free its response buffer. If SMB2_open_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
8.8
EG Score
8.8(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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
Severity88% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
28%
KEV
Not listed

Published

July 25, 2026

Last Modified

August 17, 2026

Advisory Details (5)

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

smb: client: fix double-free in SMB2_open() replay - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b55e182f2324bc6a604c21a47aa6c448f719a532
generic

smb: client: fix double-free in SMB2_open() replay - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ff2d30927bc3bf3c629f0768d2068096e64ef5ce
generic

smb: client: fix double-free in SMB2_open() replay - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/14498ff5ce0f272ce0ef988721413e06b7038972
generic

smb: client: fix double-free in SMB2_open() replay - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3196b5192f246df4272072f61a2f4a3e9967f55d
generic

smb: client: fix double-free in SMB2_open() replay - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/02bc2896bdc3e29362d6e40d404006944a159c25

Vendor Advisories for CVE-2026-64382(3)

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

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatkernel-0:6.12.0-211.49.1.el10_22026-08-20redhat
redhatkernel-0:5.14.0-687.41.1.el9_82026-08-20redhat

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

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux-6.12—6.12.100-1~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—

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 31× in last 7d / 153× 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 183 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-64382?
CVE-2026-64382 is a high vulnerability published on July 25, 2026. In the Linux kernel, the following vulnerability has been resolved: smb: client: fix double-free in SMB2_open() replay A response-bearing attempt can return a replayable error and free its response buffer. If SMB2openinit() fails before the next send, cleanup retains the previous buffer type and…
When was CVE-2026-64382 disclosed?
CVE-2026-64382 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-2026-64382 actively exploited?
CVE-2026-64382 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 71.9% of all scored CVEs.
What is the CVSS score of CVE-2026-64382?
CVE-2026-64382 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-64382?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64382, 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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