CVE-2026-89779 Linux Kernel - Information Disclosure

Linux kernel fs/ntfs3 contains an information disclosure vulnerability caused by improper validation of ef->size in extended attribute records, letting local attackers leak heap memory via crafted NTFS images, exploit requires local access.

CVSS base score 9.1 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.70% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Information Disclosure
Impact
Information Disclosure
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Published
16 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for fs/ntfs3 extended attribute validation.

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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