CVE-2022-50394
18.09.2025, 14:15
In the Linux kernel, the following vulnerability has been resolved: i2c: ismt: Fix an out-of-bounds bug in ismt_access() When the driver does not check the data from the user, the variable 'data->block[0]' may be very large to cause an out-of-bounds bug. The following log can reveal it: [ 33.995542] i2c i2c-1: ioctl, cmd=0x720, arg=0x7ffcb3dc3a20 [ 33.995978] ismt_smbus 0000:00:05.0: I2C_SMBUS_BLOCK_DATA: WRITE [ 33.996475] ================================================================== [ 33.996995] BUG: KASAN: out-of-bounds in ismt_access.cold+0x374/0x214b [ 33.997473] Read of size 18446744073709551615 at addr ffff88810efcfdb1 by task ismt_poc/485 [ 33.999450] Call Trace: [ 34.001849] memcpy+0x20/0x60 [ 34.002077] ismt_access.cold+0x374/0x214b [ 34.003382] __i2c_smbus_xfer+0x44f/0xfb0 [ 34.004007] i2c_smbus_xfer+0x10a/0x390 [ 34.004291] i2cdev_ioctl_smbus+0x2c8/0x710 [ 34.005196] i2cdev_ioctl+0x5ec/0x74c Fix this bug by checking the size of 'data->block[0]' first.Enginsight
| Vendor | Product | Version |
|---|---|---|
| linux | linux_kernel | 3.9 ≤ 𝑥 < 4.9.337 |
| linux | linux_kernel | 4.10 ≤ 𝑥 < 4.14.303 |
| linux | linux_kernel | 4.15 ≤ 𝑥 < 4.19.270 |
| linux | linux_kernel | 4.20 ≤ 𝑥 < 5.4.229 |
| linux | linux_kernel | 5.5 ≤ 𝑥 < 5.10.163 |
| linux | linux_kernel | 5.11 ≤ 𝑥 < 5.15.86 |
| linux | linux_kernel | 5.16 ≤ 𝑥 < 6.0.16 |
| linux | linux_kernel | 6.1 ≤ 𝑥 < 6.1.2 |
𝑥
= Vulnerable software versions
Debian Releases
Common Weakness Enumeration
References