cbcvebase.
CVE-2026-45865
published 2026-05-27

CVE-2026-45865: 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…

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.

Affected

8 ranges
VendorProductVersion rangeFixed in
linuxlinux——
linuxlinux>= f5b8abf9fc3dacd7529d363e26fe8230935d65f8 < 93e01e837e105299f1c259ef71f6e1ec4fe806e393e01e837e105299f1c259ef71f6e1ec4fe806e3
linuxlinux>= f5b8abf9fc3dacd7529d363e26fe8230935d65f8 < 11f83253244060b5de5eac787f61ae3f3e559d0111f83253244060b5de5eac787f61ae3f3e559d01
linuxlinux>= f5b8abf9fc3dacd7529d363e26fe8230935d65f8 < fa9861e5c8af7651dddfa8d490aaada17ae33b6cfa9861e5c8af7651dddfa8d490aaada17ae33b6c
linuxlinux>= f5b8abf9fc3dacd7529d363e26fe8230935d65f8 < 6ff2ebfef75fbc57d937d8fbe738b967edf2d3316ff2ebfef75fbc57d937d8fbe738b967edf2d331
linuxlinux>= f5b8abf9fc3dacd7529d363e26fe8230935d65f8 < 1eeedb310229bfee9dd4d992e5bba33fe1378a8f1eeedb310229bfee9dd4d992e5bba33fe1378a8f
linuxlinux>= f5b8abf9fc3dacd7529d363e26fe8230935d65f8 < 2a14e91b6d76639dac70ea170f4384c1ee3cb48d2a14e91b6d76639dac70ea170f4384c1ee3cb48d
linuxlinux_kernel——