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 — Patch released 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
29%
KEV
Not listed

Published

July 25, 2026

Last Modified

September 4, 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(5)

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

Patch Availability(9)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1019.19) @ resolute2026-09-18ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1013.13) @ resolute2026-09-18ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-31.31) @ resolute2026-09-18ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1018.18~24.04.1) @ noble2026-09-18ubuntu
ubuntulinux-tools-gcp-edge (7.0.0-1011.11~24.04.1) @ noble2026-09-18ubuntu
ubuntulinux-tools-nvidia-tegra-rt-6.8 (6.8.0-1035.38) @ noble2026-09-18ubuntu
redhatkernel-0:5.14.0-570.141.1.el9_62026-09-16redhat
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 (158 versions)7.1.4-1—

Weakness Classification(1)

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

Additional Vendor Advisories

(6)

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 30× in last 7d / 129× 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 265 total refreshes for this CVE.

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

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 September 4, 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 70.9% 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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