CVE-2022-50394

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2022-50394
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50394.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2022-50394
Downstream
Related
Published
2025-09-18T13:33:12.992Z
Modified
2026-04-02T08:28:28.444448Z
Severity
  • 7.1 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H CVSS Calculator
Summary
i2c: ismt: Fix an out-of-bounds bug in ismt_access()
Details

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] ismtsmbus 0000:00:05.0: I2CSMBUSBLOCKDATA: WRITE [ 33.996475] ================================================================== [ 33.996995] BUG: KASAN: out-of-bounds in ismtaccess.cold+0x374/0x214b [ 33.997473] Read of size 18446744073709551615 at addr ffff88810efcfdb1 by task ismtpoc/485 [ 33.999450] Call Trace: [ 34.001849] memcpy+0x20/0x60 [ 34.002077] ismt_access.cold+0x374/0x214b [ 34.003382] _i2csmbusxfer+0x44f/0xfb0 [ 34.004007] i2csmbusxfer+0x10a/0x390 [ 34.004291] i2cdevioctlsmbus+0x2c8/0x710 [ 34.005196] i2cdevioctl+0x5ec/0x74c

Fix this bug by checking the size of 'data->block[0]' first.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50394.json",
    "cna_assigner": "Linux"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
13f35ac14cd0a9a1c4f0034c4c40d0ae98844ce9
Fixed
4a7bb1d93addb2f67e36fed00a53cb7f270d7b7a
Fixed
03b7ef7a6c5ca1ff553470166b4919db88b810f6
Fixed
bfe41d966c860a8ad4c735639d616da270c92735
Fixed
cdcbae2c5003747ddfd14e29db9c1d5d7e7c44dd
Fixed
9ac541a0898e8ec187a3fa7024b9701cffae6bf2
Fixed
96c12fd0ec74641295e1c3c34dea3dce1b6c3422
Fixed
a642469d464b2780a25a49b51ae56623c65eac34
Fixed
233348a04becf133283f0076e20b317302de21d9
Fixed
39244cc754829bf707dccd12e2ce37510f5b1f8d

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50394.json"