CVE-2026-40706
Heap overflow in ntfs-3g allows local root compromise via crafted NTFS image.
Is CVE-2026-40706 being exploited?
Not confirmed. CVE-2026-40706 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.17% probability of exploitation in the next 30 days.
How severe is CVE-2026-40706?
CVE-2026-40706 is rated High with a CVSS score of 8.4. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-40706?
Yes. A fix has been recorded for CVE-2026-40706. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-40706 affect?
CVE-2026-40706 affects NTFS-3G (Linux/macOS) <= 2026.2.25. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-40706?
Patch NTFS-3G to 2026.2.25+
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Local root privilege escalation via heap overflow during ACL processing when reading a crafted NTFS image.
Patch when possible
- affected>= 2022.10.3 and < 2026.2.25
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.