CVE-2026-45865
mctp i2c: initialise event handler read bytes
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | May 27, 2026 |
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Affected Versions
Linux / Linux
f5b8abf9fc3dacd7529d363e26fe8230935d65f8 < 93e01e837e105299f1c259ef71f6e1ec4fe806e3 f5b8abf9fc3dacd7529d363e26fe8230935d65f8 < 11f83253244060b5de5eac787f61ae3f3e559d01 f5b8abf9fc3dacd7529d363e26fe8230935d65f8 < fa9861e5c8af7651dddfa8d490aaada17ae33b6c f5b8abf9fc3dacd7529d363e26fe8230935d65f8 < 6ff2ebfef75fbc57d937d8fbe738b967edf2d331 f5b8abf9fc3dacd7529d363e26fe8230935d65f8 < 1eeedb310229bfee9dd4d992e5bba33fe1378a8f f5b8abf9fc3dacd7529d363e26fe8230935d65f8 < 2a14e91b6d76639dac70ea170f4384c1ee3cb48d
Linux / Linux
5.18
References
git.kernel.org: https://git.kernel.org/stable/c/93e01e837e105299f1c259ef71f6e1ec4fe806e3 git.kernel.org: https://git.kernel.org/stable/c/11f83253244060b5de5eac787f61ae3f3e559d01 git.kernel.org: https://git.kernel.org/stable/c/fa9861e5c8af7651dddfa8d490aaada17ae33b6c git.kernel.org: https://git.kernel.org/stable/c/6ff2ebfef75fbc57d937d8fbe738b967edf2d331 git.kernel.org: https://git.kernel.org/stable/c/1eeedb310229bfee9dd4d992e5bba33fe1378a8f git.kernel.org: https://git.kernel.org/stable/c/2a14e91b6d76639dac70ea170f4384c1ee3cb48d