CVE-2026-93287 Linux Kernel - Buffer Overflow

Linux kernel contains a buffer overflow vulnerability caused by lack of early validation of oversized SMBus block transfers in __i2c_smbus_xfer, letting local attackers cause out-of-bounds memory access, exploit requires crafted SMBus block transfer requests.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.13% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Buffer Overflow
Impact
Denial Of Service, Remote Code Execution
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
24 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for SMBus block transfer validation.

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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