CVE-2026-40706

HIGHNVD 8.48.4—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.4 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 94% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
8.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.4Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

In NTFS-3G 2022.10.3 before 2026.2.25, a heap buffer overflow exists in ntfs_build_permissions_posix() in acls.c that allows an attacker to corrupt heap memory in the SUID-root ntfs-3g binary by crafting a malicious NTFS image. The overflow is triggered on the READ path (stat, readdir, open) when processing a security descriptor with multiple ACCESS_DENIED ACEs containing WRITE_OWNER from distinct group SIDs.

CVSS v3
8.4
EG Score
8.4(medium)
EG Risk
38(Track)
EG Risk 38/100SSVC: 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
Severity84% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
6%
KEV
Not listed

Published

April 21, 2026

Last Modified

April 22, 2026

Advisory Details (6)

Auto-updated May 4, 2026
Patch available. Sources: github.
generic Patch Available

[SECURITY] [DLA 4544-1] ntfs-3g security update

https://lists.debian.org/debian-lts-announce/2026/04/msg00024.html
generic

oss-security - CVE-2026-40706: ntfs-3g 2022.10.3: Heap buffer overflow

http://www.openwall.com/lists/oss-security/2026/04/21/4
generic

oss-security - CVE-2026-40706: ntfs-3g 2022.10.3: Heap buffer overflow

https://www.openwall.com/lists/oss-security/2026/04/21/4
github Patch Available

Heap Buffer Overflow in ntfs_build_permissions_posix() · Advisory · tuxera/ntfs-3g · GitHub

https://github.com/tuxera/ntfs-3g/security/advisories/GHSA-4cwv-5285-63v9
generic

Release NTFS-3G 2026.2.25 · tuxera/ntfs-3g · GitHub

https://github.com/tuxera/ntfs-3g/releases/tag/2026.2.25
generic

ntfs-3g/libntfs-3g/acls.c at d3ace19838ce37cfde55294e76841e6d2f393f9e · tuxera/ntfs-3g · GitHub

https://github.com/tuxera/ntfs-3g/blob/d3ace19838ce37cfde55294e76841e6d2f393f9e/libntfs-3g/acls.c#L4011-L4027

Vendor Advisories for CVE-2026-40706(1)

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

Affected Packages

(9 across 9 ecosystems)
Alpine:v3.20(1)
PackageVulnerable rangeFixed inDependents
ntfs-3g—2026.2.25-r0—
Alpine:v3.21(1)
PackageVulnerable rangeFixed inDependents
ntfs-3g—2026.2.25-r0—
Alpine:v3.22(1)
PackageVulnerable rangeFixed inDependents
ntfs-3g—2026.2.25-r0—
Alpine:v3.23(1)
PackageVulnerable rangeFixed inDependents
ntfs-3g—2026.2.25-r0—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
ntfs-3g—2026.2.25-r0—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
ntfs-3g1:2017.3.23AR.3-4, 1:2017.3.23AR.3-4+deb11u1, 1:2017.3.23AR.3-4+deb11u2, 1:2017.3.23AR.3-4+deb11u3, 1:2017.3.23AR.3-4+deb11u41:2017.3.23AR.3-4+deb11u5—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
ntfs-3g1:2022.10.3-1, 1:2022.10.3-1+deb12u1, 1:2022.10.3-1+deb12u21:2022.10.3-1+deb12u3—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
ntfs-3g1:2022.10.3-51:2022.10.3-5+deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
ntfs-3g1:2022.10.3-51:2026.2.25-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 26× 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 181 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-40706?
CVE-2026-40706 is a high vulnerability published on April 21, 2026. In NTFS-3G 2022.10.3 before 2026.2.25, a heap buffer overflow exists in ntfsbuildpermissionsposix() in acls.c that allows an attacker to corrupt heap memory in the SUID-root ntfs-3g binary by crafting a malicious NTFS image. The overflow is triggered on the READ path (stat, readdir, open) when…
When was CVE-2026-40706 disclosed?
CVE-2026-40706 was first published in the National Vulnerability Database on April 21, 2026, with the most recent update on April 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-40706 actively exploited?
CVE-2026-40706 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 93.9% of all scored CVEs.
What is the CVSS score of CVE-2026-40706?
CVE-2026-40706 has a CVSS v3 base score of 8.4 (NVD).
How do I remediate CVE-2026-40706?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-40706, 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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