Vulnerability details
CVE-2022-50394
i2c: ismt: Fix an out-of-bounds bug in ismt_access()
Official description
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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.1High | 3.1 | CISA ADP / Vulnrichment (CISA-ADP) | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H |
| 7.8High | 3.1 | CVEProject cvelistV5 (CNA) (Linux) | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Linux | Linux | 3.9 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 13f35ac14cd0a9a1c4f0034c4c40d0ae98844ce9 ≤ v < 03b7ef7a6c5ca1ff553470166b4919db88b810f6 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 13f35ac14cd0a9a1c4f0034c4c40d0ae98844ce9 ≤ v < bfe41d966c860a8ad4c735639d616da270c92735 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 13f35ac14cd0a9a1c4f0034c4c40d0ae98844ce9 ≤ v < cdcbae2c5003747ddfd14e29db9c1d5d7e7c44dd | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 13f35ac14cd0a9a1c4f0034c4c40d0ae98844ce9 ≤ v < 9ac541a0898e8ec187a3fa7024b9701cffae6bf2 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 13f35ac14cd0a9a1c4f0034c4c40d0ae98844ce9 ≤ v < 4a7bb1d93addb2f67e36fed00a53cb7f270d7b7a | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 13f35ac14cd0a9a1c4f0034c4c40d0ae98844ce9 ≤ v < a642469d464b2780a25a49b51ae56623c65eac34 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 13f35ac14cd0a9a1c4f0034c4c40d0ae98844ce9 ≤ v < 233348a04becf133283f0076e20b317302de21d9 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 13f35ac14cd0a9a1c4f0034c4c40d0ae98844ce9 ≤ v < 39244cc754829bf707dccd12e2ce37510f5b1f8d | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 13f35ac14cd0a9a1c4f0034c4c40d0ae98844ce9 ≤ v < 96c12fd0ec74641295e1c3c34dea3dce1b6c3422 | CVEProject cvelistV5 (CNA) |
References and advisories
9- https://git.kernel.org/stable/c/4a7bb1d93addb2f67e36fed00a53cb7f270d7b7a
- https://git.kernel.org/stable/c/03b7ef7a6c5ca1ff553470166b4919db88b810f6
- https://git.kernel.org/stable/c/bfe41d966c860a8ad4c735639d616da270c92735
- https://git.kernel.org/stable/c/cdcbae2c5003747ddfd14e29db9c1d5d7e7c44dd
- https://git.kernel.org/stable/c/9ac541a0898e8ec187a3fa7024b9701cffae6bf2
- https://git.kernel.org/stable/c/96c12fd0ec74641295e1c3c34dea3dce1b6c3422
- https://git.kernel.org/stable/c/a642469d464b2780a25a49b51ae56623c65eac34
- https://git.kernel.org/stable/c/233348a04becf133283f0076e20b317302de21d9
- https://git.kernel.org/stable/c/39244cc754829bf707dccd12e2ce37510f5b1f8d
Details
- Published
- 2025-09-18
- Last updated
- 2026-08-05
- State
- Published
- Assigner (CNA)
- Linux
Exploit prediction (EPSS)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-125Out-of-bounds Read