CVE-2022-48924 thermal: int340x: fix memory leak in int3400_notify()

2024-08-2201:33:05

Linux

www.cve.org

linux kernel

memory leak

thermal

int340x

tigerlake

vulnerability

fix

cve-2022-48924

kfree

int3400_notify

EPSS

Percentile

5.0%

JSON

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

thermal: int340x: fix memory leak in int3400_notify()

It is easy to hit the below memory leaks in my TigerLake platform:

unreferenced object 0xffff927c8b91dbc0 (size 32):
comm “kworker/0:2”, pid 112, jiffies 4294893323 (age 83.604s)
hex dump (first 32 bytes):
4e 41 4d 45 3d 49 4e 54 33 34 30 30 20 54 68 65 NAME=INT3400 The
72 6d 61 6c 00 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b a5 rmal.kkkkkkkkkk.
backtrace:
[<ffffffff9c502c3e>] __kmalloc_track_caller+0x2fe/0x4a0
[<ffffffff9c7b7c15>] kvasprintf+0x65/0xd0
[<ffffffff9c7b7d6e>] kasprintf+0x4e/0x70
[<ffffffffc04cb662>] int3400_notify+0x82/0x120 [int3400_thermal]
[<ffffffff9c8b7358>] acpi_ev_notify_dispatch+0x54/0x71
[<ffffffff9c88f1a7>] acpi_os_execute_deferred+0x17/0x30
[<ffffffff9c2c2c0a>] process_one_work+0x21a/0x3f0
[<ffffffff9c2c2e2a>] worker_thread+0x4a/0x3b0
[<ffffffff9c2cb4dd>] kthread+0xfd/0x130
[<ffffffff9c201c1f>] ret_from_fork+0x1f/0x30

Fix it by calling kfree() accordingly.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/thermal/intel/int340x_thermal/int3400_thermal.c"
    ],
    "versions": [
      {
        "version": "38e44da59130",
        "lessThan": "f0ddc5184b01",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "38e44da59130",
        "lessThan": "c3fa6d1937a8",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "38e44da59130",
        "lessThan": "2e798814e018",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "38e44da59130",
        "lessThan": "e098933866f9",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "38e44da59130",
        "lessThan": "ba9efbbf6745",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "38e44da59130",
        "lessThan": "33c73a4d7e7b",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "38e44da59130",
        "lessThan": "3abea10e6a8f",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/thermal/intel/int340x_thermal/int3400_thermal.c"
    ],
    "versions": [
      {
        "version": "4.14",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "4.14",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.14.274",
        "lessThanOrEqual": "4.14.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.19.237",
        "lessThanOrEqual": "4.19.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.188",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.103",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.26",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.16.12",
        "lessThanOrEqual": "5.16.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.17",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]