CVE-2026-90048 Linux Kernel - Out of Bounds Read/Write

Linux kernel contains a slab-out-of-bounds write in ni_create_attr_list() caused by improper buffer sizing when processing NTFS attributes, letting attackers with access to crafted loop-mounted NTFS images cause heap buffer overflow, exploit requires mounting a crafted NTFS image and file attribute modification.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.67% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Out of Bounds Read/Write
Impact
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
16 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for ni_create_attr_list() slab-out-of-bounds write.

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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