CVE-2026-89482 Linux Kernel nvme-tcp - Memory Corruption

Linux kernel nvme-tcp contains a memory corruption vulnerability caused by improper validation of C2HData based on blk_rq_payload_bytes() without checking blk_rq_nr_phys_segments(), letting attackers cause wild memory access and kernel crash, exploit requires crafted network packets targeting WRITE_ZEROES commands.

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
Memory Corruption
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
11 September 2026
Updated
15 October 2026

Vendor fix

Update to Linux kernel version 7.2.0-rc5-NVMETCP-gf5098b6bae76 or later where the issue is fixed.

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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