CVE-2026-45865

mctp i2c: initialise event handler read bytes

published May 27, 2026

CVSS
—
EPSS
0%
Percentile
5.2
In the wild
Unconfirmed
What it is

In the Linux kernel, the following vulnerability has been resolved:

mctp i2c: initialise event handler read bytes

Set a 0xff value for i2c reads of an mctp-i2c device. Otherwise reads

will return "val" from the i2c bus driver. For i2c-aspeed and

i2c-npcm7xx that is a stack uninitialised u8.

Tested with "i2ctransfer -y 1 r10@0x34" where 0x34 is a mctp-i2c

instance, now it returns all 0xff.

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.00162 · 5.2th percentile
Published
2026-05-27T12:15Z
EPSS history
Timeline
  • 27 MAY 12:15Z
    mctp i2c: initialise event handler read bytes
    cvelistv5