CVE-2026-89969 Linux Kernel nvmet-tcp - Out-of-Bounds Write

Linux kernel nvmet-tcp contains an out-of-bounds write vulnerability caused by improper bounds checking when receiving an over-long PDU, letting remote unauthenticated attackers corrupt adjacent kernel memory, exploit requires sending crafted PDU.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.71% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Out-of-Bounds Write
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
16 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the 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

← All CVEs