CVE-2026-45865
N/A
N/A
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | f5b8abf9fc3dacd7529d363e26fe8230935d65f8 < 93e01e837e105299f1c259ef71f6e1ec4fe806e3 | affected |
| Linux | Linux | f5b8abf9fc3dacd7529d363e26fe8230935d65f8 < 11f83253244060b5de5eac787f61ae3f3e559d01 | affected |
| Linux | Linux | f5b8abf9fc3dacd7529d363e26fe8230935d65f8 < fa9861e5c8af7651dddfa8d490aaada17ae33b6c | affected |
| Linux | Linux | f5b8abf9fc3dacd7529d363e26fe8230935d65f8 < 6ff2ebfef75fbc57d937d8fbe738b967edf2d331 | affected |
| Linux | Linux | f5b8abf9fc3dacd7529d363e26fe8230935d65f8 < 1eeedb310229bfee9dd4d992e5bba33fe1378a8f | affected |
| Linux | Linux | f5b8abf9fc3dacd7529d363e26fe8230935d65f8 < 2a14e91b6d76639dac70ea170f4384c1ee3cb48d | affected |
| Linux | Linux | 5.18 | affected |
| Linux | Linux | 0 < 5.18 | unaffected |
| Linux | Linux | 6.1.165 <= 6.1.* | unaffected |
| Linux | Linux | 6.6.128 <= 6.6.* | unaffected |
| Linux | Linux | 6.12.75 <= 6.12.* | unaffected |
| Linux | Linux | 6.18.14 <= 6.18.* | unaffected |
| Linux | Linux | 6.19.4 <= 6.19.* | unaffected |
| Linux | Linux | 7.0 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/93e01e837e105299f1c259ef71f6e1ec4fe806e3
- https://git.kernel.org/stable/c/11f83253244060b5de5eac787f61ae3f3e559d01
- https://git.kernel.org/stable/c/fa9861e5c8af7651dddfa8d490aaada17ae33b6c
- https://git.kernel.org/stable/c/6ff2ebfef75fbc57d937d8fbe738b967edf2d331
- https://git.kernel.org/stable/c/1eeedb310229bfee9dd4d992e5bba33fe1378a8f
- https://git.kernel.org/stable/c/2a14e91b6d76639dac70ea170f4384c1ee3cb48d
Feedback
Was this page helpful?
Glad to hear it! Please tell us how we can improve.
Sorry to hear that. Please tell us how we can improve.