Kernel-level NTFS parsing flaw impacts widely deployed Linux kernels and distributions; risk of kernel compromise across orgs.
CVE-2026-89613
In-kernel NTFS parsing flaw allows kernel compromise via crafted filesystem
Is CVE-2026-89613 being exploited?
Not confirmed. CVE-2026-89613 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 0.55% probability of exploitation in the next 30 days.
How severe is CVE-2026-89613?
CVE-2026-89613 is rated Critical with a CVSS score of 9.8. 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-2026-89613?
Yes. A fix has been recorded for CVE-2026-89613. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-89613 affect?
CVE-2026-89613 affects Linux kernel (ntfs3 driver), Linux distributions (Ubuntu, Debian, RHEL, SUSE, etc.), Systems mounting NTFS volumes/images. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-89613?
Update kernel to the patched stable release or apply vendor kernel updates immediately.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
A crafted NTFS image/device can trigger kernel memory corruption, causing crashes, privilege escalation, or possible kernel code execution.
Immediate action required
- affected>= 11ccc9107dc460de28af90fac1f42404d9802735 and < b0cc6dbc655e037251874b3e0dd1a760dcf29007
- affected>= 11ccc9107dc460de28af90fac1f42404d9802735 and < 766062a82e1ce4087c7dc077224144dfd34b3661
- affected7.1
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.