Unrated severityNVD Advisory· Published May 27, 2026· Updated May 27, 2026
CVE-2026-45865
CVE-2026-45865
Description
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.
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Affected products
2Patches
Vulnerability mechanics
References
6- git.kernel.org/stable/c/11f83253244060b5de5eac787f61ae3f3e559d01nvd
- git.kernel.org/stable/c/1eeedb310229bfee9dd4d992e5bba33fe1378a8fnvd
- git.kernel.org/stable/c/2a14e91b6d76639dac70ea170f4384c1ee3cb48dnvd
- git.kernel.org/stable/c/6ff2ebfef75fbc57d937d8fbe738b967edf2d331nvd
- git.kernel.org/stable/c/93e01e837e105299f1c259ef71f6e1ec4fe806e3nvd
- git.kernel.org/stable/c/fa9861e5c8af7651dddfa8d490aaada17ae33b6cnvd
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