CVE-2024-26749 usb: cdns3: fixed memory use after free at cdns3_gadget_ep_disable()

2024-04-0317:00:35

Linux

www.cve.org

linux kernel

usb

cdns3

vulnerability

memory use after free

list_del_init

cdns3_gadget_ep_disable

bug

kfence

use-after-free read

ffs_func_eps_disable

ffs_func_set_alt

cve

7.7 High

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

10.3%

JSON

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

usb: cdns3: fixed memory use after free at cdns3_gadget_ep_disable()

…
cdns3_gadget_ep_free_request(&priv_ep->endpoint, &priv_req->request);
list_del_init(&priv_req->list);
…

‘priv_req’ actually free at cdns3_gadget_ep_free_request(). But
list_del_init() use priv_req->list after it.

[ 1542.642868][ T534] BUG: KFENCE: use-after-free read in __list_del_entry_valid+0x10/0xd4
[ 1542.642868][ T534]
[ 1542.653162][ T534] Use-after-free read at 0x000000009ed0ba99 (in kfence-#3):
[ 1542.660311][ T534] __list_del_entry_valid+0x10/0xd4
[ 1542.665375][ T534] cdns3_gadget_ep_disable+0x1f8/0x388 [cdns3]
[ 1542.671571][ T534] usb_ep_disable+0x44/0xe4
[ 1542.675948][ T534] ffs_func_eps_disable+0x64/0xc8
[ 1542.680839][ T534] ffs_func_set_alt+0x74/0x368
[ 1542.685478][ T534] ffs_func_disable+0x18/0x28

Move list_del_init() before cdns3_gadget_ep_free_request() to resolve this
problem.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/usb/cdns3/cdns3-gadget.c"
    ],
    "versions": [
      {
        "version": "7733f6c32e36",
        "lessThan": "cfa9abb5570c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "7733f6c32e36",
        "lessThan": "b40328eea93c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "7733f6c32e36",
        "lessThan": "4e5c73b15d95",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "7733f6c32e36",
        "lessThan": "2134e9906e17",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "7733f6c32e36",
        "lessThan": "29e42e1578a1",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "7733f6c32e36",
        "lessThan": "9a07244f614b",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "7733f6c32e36",
        "lessThan": "cd45f99034b0",
        "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/cdns3/cdns3-gadget.c"
    ],
    "versions": [
      {
        "version": "5.4",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.4",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.270",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.211",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.150",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.80",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.19",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.7.7",
        "lessThanOrEqual": "6.7.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.8",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]