CVE-2026-64333

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-25. a secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: 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:

USB: serial: digi_acceleport: fix write buffer corruption

The digi_write_inb_command() is supposed to wait for the write urb to become available or return an error, but instead it updates the transfer buffer and tries to resubmit the urb on timeout.

To make things worse, for commands like break control where no timeout is used, the driver would corrupt the urb immediately due to a broken jiffies comparison (on 32-bit machines this takes five minutes of uptime to trigger due to INITIAL_JIFFIES).

Fix this by adding the missing return on timeout and waiting indefinitely when no timeout has been specified as intended.

This issue was (sort of) flagged by Sashiko when reviewing an unrelated change to the driver.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity78% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
6%
KEV
Not listed

Published

July 25, 2026

Last Modified

August 17, 2026

Advisory Details (8)

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

USB: serial: digi_acceleport: fix write buffer corruption - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e60e4873e9178da9f4f2674e4c2ff085d5a84f79
generic

USB: serial: digi_acceleport: fix write buffer corruption - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a3a13fdc53103b07335918e2cdeb465038a71725
generic

USB: serial: digi_acceleport: fix write buffer corruption - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a274b3794fe1852c3d9fe6d900b94053c0b03410
generic

USB: serial: digi_acceleport: fix write buffer corruption - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/699dfb6917503b3cda4d5da6941cf79c3c1b4c8b
generic

USB: serial: digi_acceleport: fix write buffer corruption - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5d9dc88bdf8897788b0eed57113e9eca7fd42ea9
generic

USB: serial: digi_acceleport: fix write buffer corruption - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2f296974acc279f05f284441bfe3064074958d11
generic

USB: serial: digi_acceleport: fix write buffer corruption - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/24ca1fea8f2753bf33e1d458ec1ae5d9b7796a65
generic

USB: serial: digi_acceleport: fix write buffer corruption - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1243f120790042c2ac92e84e797dacc75fff4366

Vendor Advisories for CVE-2026-64333(2)

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

Affected Packages

(6 across 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 5.10.92-2 (55 versions)5.10.262-1—
linux-6.16.1.106-3~deb11u1 ... 6.1.177-1~deb11u1 (22 versions)6.1.180-1~deb11u1—
Debian:12(2)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (55 versions)6.1.180-1—
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—

Data Freshness Timeline

(refreshed 19× in last 7d / 104× 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 132 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-64333?
CVE-2026-64333 is a high vulnerability published on July 25, 2026. In the Linux kernel, the following vulnerability has been resolved: USB: serial: digi_acceleport: fix write buffer corruption The digiwriteinb_command() is supposed to wait for the write urb to become available or return an error, but instead it updates the transfer buffer and tries to resubmit the…
When was CVE-2026-64333 disclosed?
CVE-2026-64333 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-2026-64333 actively exploited?
CVE-2026-64333 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 93.6% of all scored CVEs.
What is the CVSS score of CVE-2026-64333?
CVE-2026-64333 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-64333?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64333, 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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