CVE-2026-89559 Linux Kernel libnvdimm - Integer Overflow

Linux kernel libnvdimm contains an integer overflow caused by 32-bit multiplication wraparound in __nd_label_validate(), letting attackers trigger out-of-bounds write via crafted nslot value, exploit requires untrusted input from medium or userspace.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.17% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Integer Overflow
Impact
Remote Code Execution, Denial Of Service
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/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 fix for __nd_label_validate() integer overflow.

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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