CVE-2026-80985 Linux Kernel - Data Tampering & Denial of Service

Linux kernel contains a vulnerability in net/smc where oversized SMC-Rv2 LLC messages are improperly handled in smc_llc_rmt_delete_rkey() and smc_llc_save_add_link_rkeys(), letting attackers cause unintended rkey deletions and modifications, exploit requires crafted SMC-Rv2 LLC messages on a shared v2 receive buffer link.

CVSS base score 8.2 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.54% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Data Tampering
Impact
Denial Of Service, Data Tampering
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Published
11 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for net/smc message handling.

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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