CVE-2024-8946

HIGHNVD 7.37.3—
EchelonGraph scoreMEDIUM confidence

Score 7.3 from GitHub Security Advisory published 2024-09-17. NVD baseline CVSS 7.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: ghsa, nvd
Elevated
7.3
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 7.3Exploit: NoneExposed: 0

A fix is available — apply it.

A vulnerability was found in MicroPython 1.23.0. It has been classified as critical. Affected is the function mp_vfs_umount of the file extmod/vfs.c of the component VFS Unmount Handler. The manipulation leads to heap-based buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The name of the patch is 29943546343c92334e8518695a11fc0e2ceea68b. It is recommended to apply a patch to fix this issue. In the VFS unmount process, the comparison between the mounted path string and the unmount requested string is based solely on the length of the unmount string, which can lead to a heap buffer overflow read.

CVSS v3
7.3
EG Score
7.3(medium)
EPSS
58.9%
KEV
Not listed

Published

September 17, 2024

Last Modified

September 24, 2024

References (6)

Patch Availability(5)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntumicropython-doc (1.22.1+ds-1ubuntu0.24.10.1) @ oracular2026-05-23ubuntu
pipmicropython-copy—ghsa
pipmicropython-io—ghsa
pipmicropython-os-path—ghsa
pipmicropython-string—ghsa

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

(4 across 1 ecosystem)
PyPI(4)
PackageVulnerable rangeFixed inDependents
micropython-copy0.0.1, 0.0.2, 3.3.3-2, 3.3.3.post329943546343c92334e8518695a11fc0e2ceea68b—
micropython-io0.0.1, 0.0.2, 0.0.3, 0.129943546343c92334e8518695a11fc0e2ceea68b—
micropython-os-path0.0.1 ... 0.1.3 (7 versions)29943546343c92334e8518695a11fc0e2ceea68b—
micropython-string0.0.1 ... v1.0-rc1 (62 versions)29943546343c92334e8518695a11fc0e2ceea68b—

Weakness Classification(2)

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

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 10× in last 7d / 44× 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.

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

Related CVEs(same product + same vendor + same CWE)

Same product

2 shown

pip:micropython-copy

Frequently asked(5)

What is CVE-2024-8946?
CVE-2024-8946 is a high vulnerability published on September 17, 2024. A vulnerability was found in MicroPython 1.23.0. It has been classified as critical. Affected is the function mpvfsumount of the file extmod/vfs.c of the component VFS Unmount Handler. The manipulation leads to heap-based buffer overflow. It is possible to launch the attack remotely. The exploit…
When was CVE-2024-8946 disclosed?
CVE-2024-8946 was first published in the National Vulnerability Database on September 17, 2024, with the most recent update on September 24, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-8946 actively exploited?
CVE-2024-8946 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 58.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2024-8946?
CVE-2024-8946 has a CVSS v3 base score of 7.3 (NVD).
How do I remediate CVE-2024-8946?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-8946, 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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