CVE-2023-52840 Input: synaptics-rmi4 - fix use after free in rmi_unregister_function()

2024-05-2115:31:39

Linux

www.cve.org

linux kernel

vulnerability resolved

synaptics-rmi4

use after free

rmi_unregister_function

put_device

cve

6.6 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

13.2%

JSON

In the Linux kernel, the following vulnerability has been resolved:

Input: synaptics-rmi4 - fix use after free in rmi_unregister_function()

The put_device() calls rmi_release_function() which frees “fn” so the
dereference on the next line “fn->num_of_irqs” is a use after free.
Move the put_device() to the end to fix this.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/input/rmi4/rmi_bus.c"
    ],
    "versions": [
      {
        "version": "24d28e4f1271",
        "lessThan": "2f236d8638f5",
        "status": "affected",
        "versionType": "git"
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  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/input/rmi4/rmi_bus.c"
    ],
    "versions": [
      {
        "version": "4.18",
        "status": "affected"
      },
      {
        "version": "0",
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        "versionType": "custom"
      },
      {
        "version": "4.19.299",
        "lessThanOrEqual": "4.19.*",
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      },
      {
        "version": "5.4.261",
        "lessThanOrEqual": "5.4.*",
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      },
      {
        "version": "5.10.201",
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      {
        "version": "5.15.139",
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        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.63",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.5.12",
        "lessThanOrEqual": "6.5.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.2",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.7",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]