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.
References
Configurations
Configuration 1 (hide)
|
History
12 Dec 2025, 20:39
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Linux
Linux linux Kernel |
|
| CWE | CWE-125 | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.1 |
| References | () https://git.kernel.org/stable/c/03b7ef7a6c5ca1ff553470166b4919db88b810f6 - Patch | |
| References | () https://git.kernel.org/stable/c/233348a04becf133283f0076e20b317302de21d9 - Patch | |
| References | () https://git.kernel.org/stable/c/39244cc754829bf707dccd12e2ce37510f5b1f8d - Patch | |
| References | () https://git.kernel.org/stable/c/4a7bb1d93addb2f67e36fed00a53cb7f270d7b7a - Patch | |
| References | () https://git.kernel.org/stable/c/96c12fd0ec74641295e1c3c34dea3dce1b6c3422 - Patch | |
| References | () https://git.kernel.org/stable/c/9ac541a0898e8ec187a3fa7024b9701cffae6bf2 - Patch | |
| References | () https://git.kernel.org/stable/c/a642469d464b2780a25a49b51ae56623c65eac34 - Patch | |
| References | () https://git.kernel.org/stable/c/bfe41d966c860a8ad4c735639d616da270c92735 - Patch | |
| References | () https://git.kernel.org/stable/c/cdcbae2c5003747ddfd14e29db9c1d5d7e7c44dd - Patch | |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
18 Sep 2025, 14:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-09-18 14:15
Updated : 2025-12-12 20:39
NVD link : CVE-2022-50394
Mitre link : CVE-2022-50394
CVE.ORG link : CVE-2022-50394
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-125
Out-of-bounds Read