CVE-2024-26894 ACPI: processor_idle: Fix memory leak in acpi_processor_power_exit()

2024-04-1710:27:45

Linux

www.cve.org

linux kernel

vulnerability

acpi

memory leak

cpu idle device

cve-2024-26894

processor power exit

kmalloc_trace

7.7 High

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

13.0%

JSON

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

ACPI: processor_idle: Fix memory leak in acpi_processor_power_exit()

After unregistering the CPU idle device, the memory associated with
it is not freed, leading to a memory leak:

unreferenced object 0xffff896282f6c000 (size 1024):
comm “swapper/0”, pid 1, jiffies 4294893170
hex dump (first 32 bytes):
00 00 00 00 0b 00 00 00 00 00 00 00 00 00 00 00 …
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 …
backtrace (crc 8836a742):
[<ffffffff993495ed>] kmalloc_trace+0x29d/0x340
[<ffffffff9972f3b3>] acpi_processor_power_init+0xf3/0x1c0
[<ffffffff9972d263>] __acpi_processor_start+0xd3/0xf0
[<ffffffff9972d2bc>] acpi_processor_start+0x2c/0x50
[<ffffffff99805872>] really_probe+0xe2/0x480
[<ffffffff99805c98>] __driver_probe_device+0x78/0x160
[<ffffffff99805daf>] driver_probe_device+0x1f/0x90
[<ffffffff9980601e>] __driver_attach+0xce/0x1c0
[<ffffffff99803170>] bus_for_each_dev+0x70/0xc0
[<ffffffff99804822>] bus_add_driver+0x112/0x210
[<ffffffff99807245>] driver_register+0x55/0x100
[<ffffffff9aee4acb>] acpi_processor_driver_init+0x3b/0xc0
[<ffffffff990012d1>] do_one_initcall+0x41/0x300
[<ffffffff9ae7c4b0>] kernel_init_freeable+0x320/0x470
[<ffffffff99b231f6>] kernel_init+0x16/0x1b0
[<ffffffff99042e6d>] ret_from_fork+0x2d/0x50

Fix this by freeing the CPU idle device after unregistering it.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/acpi/processor_idle.c"
    ],
    "versions": [
      {
        "version": "3d339dcbb56d",
        "lessThan": "d351bcadab6c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "3d339dcbb56d",
        "lessThan": "ea96bf3f8062",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "3d339dcbb56d",
        "lessThan": "c2a30c81bf3c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "3d339dcbb56d",
        "lessThan": "1cbaf4c793b0",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "3d339dcbb56d",
        "lessThan": "fad9bcd4d754",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "3d339dcbb56d",
        "lessThan": "3d48e5be1074",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "3d339dcbb56d",
        "lessThan": "8d14a4d0afb4",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "3d339dcbb56d",
        "lessThan": "cd5c2d0b09d5",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "3d339dcbb56d",
        "lessThan": "e18afcb7b2a1",
        "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/acpi/processor_idle.c"
    ],
    "versions": [
      {
        "version": "3.7",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "3.7",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.19.311",
        "lessThanOrEqual": "4.19.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.273",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.214",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.153",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.83",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.23",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.7.11",
        "lessThanOrEqual": "6.7.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.8.2",
        "lessThanOrEqual": "6.8.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.9",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]