CVE-2026-89610 Linux Kernel - Privilege Escalation

Linux kernel contains a privilege escalation caused by improper validation of NTFS mapping pairs run length exceeding volume boundary, letting attackers cause memory corruption and escalate privileges, exploit requires crafted NTFS image.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.55% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Privilege Escalation
Impact
Privilege Escalation, Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
11 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version with the NTFS run length validation fix.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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