CVE-2021-47456 can: peak_pci: peak_pci_remove(): fix UAF

2024-05-2206:19:45

Linux

github.com

linux kernel

vulnerability

use-after-free .

6.9 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

13.1%

JSON

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

can: peak_pci: peak_pci_remove(): fix UAF

When remove the module peek_pci, referencing ‘chan’ again after
releasing ‘dev’ will cause UAF.

Fix this by releasing ‘dev’ later.

The following log reveals it:

[ 35.961814 ] BUG: KASAN: use-after-free in peak_pci_remove+0x16f/0x270 [peak_pci]
[ 35.963414 ] Read of size 8 at addr ffff888136998ee8 by task modprobe/5537
[ 35.965513 ] Call Trace:
[ 35.965718 ] dump_stack_lvl+0xa8/0xd1
[ 35.966028 ] print_address_description+0x87/0x3b0
[ 35.966420 ] kasan_report+0x172/0x1c0
[ 35.966725 ] ? peak_pci_remove+0x16f/0x270 [peak_pci]
[ 35.967137 ] ? trace_irq_enable_rcuidle+0x10/0x170
[ 35.967529 ] ? peak_pci_remove+0x16f/0x270 [peak_pci]
[ 35.967945 ] __asan_report_load8_noabort+0x14/0x20
[ 35.968346 ] peak_pci_remove+0x16f/0x270 [peak_pci]
[ 35.968752 ] pci_device_remove+0xa9/0x250

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/net/can/sja1000/peak_pci.c"
    ],
    "versions": [
      {
        "version": "e6d9c80b7ca1",
        "lessThan": "1c616528ba4a",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "e6d9c80b7ca1",
        "lessThan": "447d44cd2f67",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "e6d9c80b7ca1",
        "lessThan": "34914971bb32",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "e6d9c80b7ca1",
        "lessThan": "adbda14730aa",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "e6d9c80b7ca1",
        "lessThan": "1248582e47a9",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "e6d9c80b7ca1",
        "lessThan": "28f28e4bc3a5",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "e6d9c80b7ca1",
        "lessThan": "0e5afdc2315b",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "e6d9c80b7ca1",
        "lessThan": "949fe9b35570",
        "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/net/can/sja1000/peak_pci.c"
    ],
    "versions": [
      {
        "version": "3.4",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "3.4",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.4.290",
        "lessThanOrEqual": "4.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.9.288",
        "lessThanOrEqual": "4.9.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.14.253",
        "lessThanOrEqual": "4.14.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.19.214",
        "lessThanOrEqual": "4.19.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.156",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.76",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.14.15",
        "lessThanOrEqual": "5.14.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]