CVE-2021-47173 misc/uss720: fix memory leak in uss720_probe

2024-03-2509:16:24

Linux

www.cve.org

linux kernel

cve-2021-47173

memory leak

uss720_probe

usbdev

fix

vulnerability

5.7 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

5.1%

JSON

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

misc/uss720: fix memory leak in uss720_probe

uss720_probe forgets to decrease the refcount of usbdev in uss720_probe.
Fix this by decreasing the refcount of usbdev by usb_put_dev.

BUG: memory leak
unreferenced object 0xffff888101113800 (size 2048):
comm “kworker/0:1”, pid 7, jiffies 4294956777 (age 28.870s)
hex dump (first 32 bytes):
ff ff ff ff 31 00 00 00 00 00 00 00 00 00 00 00 …1…
00 00 00 00 00 00 00 00 00 00 00 00 03 00 00 00 …
backtrace:
[<ffffffff82b8e822>] kmalloc include/linux/slab.h:554 [inline]
[<ffffffff82b8e822>] kzalloc include/linux/slab.h:684 [inline]
[<ffffffff82b8e822>] usb_alloc_dev+0x32/0x450 drivers/usb/core/usb.c:582
[<ffffffff82b98441>] hub_port_connect drivers/usb/core/hub.c:5129 [inline]
[<ffffffff82b98441>] hub_port_connect_change drivers/usb/core/hub.c:5363 [inline]
[<ffffffff82b98441>] port_event drivers/usb/core/hub.c:5509 [inline]
[<ffffffff82b98441>] hub_event+0x1171/0x20c0 drivers/usb/core/hub.c:5591
[<ffffffff81259229>] process_one_work+0x2c9/0x600 kernel/workqueue.c:2275
[<ffffffff81259b19>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2421
[<ffffffff81261228>] kthread+0x178/0x1b0 kernel/kthread.c:292
[<ffffffff8100227f>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/usb/misc/uss720.c"
    ],
    "versions": [
      {
        "version": "0f36163d3abe",
        "lessThan": "5f46b2410db2",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "0f36163d3abe",
        "lessThan": "7889c70e6173",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "0f36163d3abe",
        "lessThan": "bcb30cc8f8be",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "0f36163d3abe",
        "lessThan": "386918878ce4",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "0f36163d3abe",
        "lessThan": "36b5ff1db1a4",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "0f36163d3abe",
        "lessThan": "5394ae9d8c79",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "0f36163d3abe",
        "lessThan": "a3c3face38cb",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "0f36163d3abe",
        "lessThan": "dcb4b8ad6a44",
        "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/usb/misc/uss720.c"
    ],
    "versions": [
      {
        "version": "2.6.14",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "2.6.14",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.4.271",
        "lessThanOrEqual": "4.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.9.271",
        "lessThanOrEqual": "4.9.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.14.235",
        "lessThanOrEqual": "4.14.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.19.193",
        "lessThanOrEqual": "4.19.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.124",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.42",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.12.9",
        "lessThanOrEqual": "5.12.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.13",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]