CVE-2026-64598

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-06. 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 error code in smb2_aead_req_alloc()

The "*num_sgs" variable is a u32 so "ERR_PTR(*num_sgs)" doesn't work. We would have to do something similar to the previous line where it's cast to int and then long. However, it's simpler to store the return in an int ret variable.

This bug would eventually result in a crash when dereference the invalid error pointer.

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
20%
KEV
Not listed

Published

August 6, 2026

Last Modified

August 17, 2026

Advisory Details (5)

Auto-updated Aug 8, 2026
No patch confirmed yet.
generic

smb/client: Fix error code in smb2_aead_req_alloc() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/cad756733dc3985188983f3e2eb77e2927209099
generic

smb/client: Fix error code in smb2_aead_req_alloc() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/aa37f5fef78dd11cbf983269da2031e12625c56d
generic

smb/client: Fix error code in smb2_aead_req_alloc() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a1cc432cb0b0a1f74f98a0db3b94ca880c7947ac
generic

smb/client: Fix error code in smb2_aead_req_alloc() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a187883cc1dc784a4d32537f5d316f1b7b9ad76f
generic

smb/client: Fix error code in smb2_aead_req_alloc() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/61f28012e5650c619223decdb7970e0d3162e949

Vendor Advisories for CVE-2026-64598(2)

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

Patch Availability(6)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-31.31) @ resolute2026-09-20ubuntu
ubuntulinux-tools-gcp-edge (7.0.0-1011.11~24.04.1) @ noble2026-09-20ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1018.18~24.04.1) @ noble2026-09-20ubuntu
ubuntulinux-tools-nvidia-tegra-rt-6.8 (6.8.0-1035.38) @ noble2026-09-20ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1019.19) @ resolute2026-09-20ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1013.13) @ resolute2026-09-20ubuntu

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—

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 32× in last 7d / 140× 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 201 total refreshes for this CVE.

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

Related CVEs(same vendor)

Frequently asked(5)

What is CVE-2026-64598?
CVE-2026-64598 is a high vulnerability published on August 6, 2026. In the Linux kernel, the following vulnerability has been resolved: smb/client: Fix error code in smb2aeadreq_alloc() The "num_sgs" variable is a u32 so "ERR_PTR(num_sgs)" doesn't work. We would have to do something similar to the previous line where it's cast to int and then long. However, it's…
When was CVE-2026-64598 disclosed?
CVE-2026-64598 was first published in the National Vulnerability Database on August 6, 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-2026-64598 actively exploited?
CVE-2026-64598 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 79.5% of all scored CVEs.
What is the CVSS score of CVE-2026-64598?
CVE-2026-64598 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-64598?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64598, 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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