fkie_cve-2022-50394
Vulnerability from fkie_nvd
Published
2025-09-18 14:15
Modified
2025-12-12 20:39
Severity ?
7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Summary
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/03b7ef7a6c5ca1ff553470166b4919db88b810f6Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/233348a04becf133283f0076e20b317302de21d9Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/39244cc754829bf707dccd12e2ce37510f5b1f8dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4a7bb1d93addb2f67e36fed00a53cb7f270d7b7aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/96c12fd0ec74641295e1c3c34dea3dce1b6c3422Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9ac541a0898e8ec187a3fa7024b9701cffae6bf2Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a642469d464b2780a25a49b51ae56623c65eac34Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bfe41d966c860a8ad4c735639d616da270c92735Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cdcbae2c5003747ddfd14e29db9c1d5d7e7c44ddPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *


To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: ismt: Fix an out-of-bounds bug in ismt_access()\n\nWhen the driver does not check the data from the user, the variable\n\u0027data-\u003eblock[0]\u0027 may be very large to cause an out-of-bounds bug.\n\nThe following log can reveal it:\n\n[   33.995542] i2c i2c-1: ioctl, cmd=0x720, arg=0x7ffcb3dc3a20\n[   33.995978] ismt_smbus 0000:00:05.0: I2C_SMBUS_BLOCK_DATA:  WRITE\n[   33.996475] ==================================================================\n[   33.996995] BUG: KASAN: out-of-bounds in ismt_access.cold+0x374/0x214b\n[   33.997473] Read of size 18446744073709551615 at addr ffff88810efcfdb1 by task ismt_poc/485\n[   33.999450] Call Trace:\n[   34.001849]  memcpy+0x20/0x60\n[   34.002077]  ismt_access.cold+0x374/0x214b\n[   34.003382]  __i2c_smbus_xfer+0x44f/0xfb0\n[   34.004007]  i2c_smbus_xfer+0x10a/0x390\n[   34.004291]  i2cdev_ioctl_smbus+0x2c8/0x710\n[   34.005196]  i2cdev_ioctl+0x5ec/0x74c\n\nFix this bug by checking the size of \u0027data-\u003eblock[0]\u0027 first."
    }
  ],
  "id": "CVE-2022-50394",
  "lastModified": "2025-12-12T20:39:36.837",
  "metrics": {
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          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
          "version": "3.1"
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        "exploitabilityScore": 1.8,
        "impactScore": 5.2,
        "source": "nvd@nist.gov",
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      "source": "nvd@nist.gov",
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}


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