CVE-2026-89612
CVE-2026-89612 is a critical severity vulnerability in the Linux kernel's NTFS driver that could lead to out-of-bounds memory access when parsing the boot sector. The issue has been resolved by rejecting invalid MFT LCNs from the boot sector. No known exploits are publicly available.
An official fix is available, so this entry is kept for 30 days and then removed automatically.
Who is affected
Linux kernel systems using the NTFS driver
Real-world impact
An attacker could trigger out-of-bounds memory access, potentially leading to system compromise.
Why this severity
The CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H indicates network‑accessible, low‑complexity, no‑privilege, no‑user‑interaction exploitation with high impact on confidentiality, integrity, and availability.
What to do about it
- 01Update the Linux kernel to a version that includes the fix for CVE-2026-89612.
- 02Reboot the system to load the updated kernel.
NVD description indicates the vulnerability has been resolved in the Linux kernel.
Timeline
- Sep 11, 2026 · 2d agoPublishedDisclosed and added to the National Vulnerability Database.
- Sep 13, 2026 · 8h agoOfficial fix availableA vendor patch or mitigation now exists — see the remediation steps above.