CVE-2026-89615 Linux kernel - Buffer Overflow

Linux kernel fs/ntfs3 contains a buffer overflow caused by improper bounds checking of page_lcns[] index in copy_lcns and redo shorten loops, letting attackers cause memory corruption, exploit requires crafted NTFS log record.

CVSS base score 8.4 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.15% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Buffer Overflow
Impact
Denial Of Service, Remote Code Execution
CVSS vector
CVSS:3.1/AV:L/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 containing the patch for fs/ntfs3 page_lcns[] bounds checking.

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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