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cvelistLinuxCVELIST:CVE-2021-47284
HistoryMay 21, 2024 - 2:20 p.m.

CVE-2021-47284 isdn: mISDN: netjet: Fix crash in nj_probe:

2024-05-2114:20:09
Linux
www.cve.org
misdn netjet fix
kasan log
linux kernel vulnerability
irq management

6.2 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

13.1%

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

isdn: mISDN: netjet: Fix crash in nj_probe:

‘nj_setup’ in netjet.c might fail with -EIO and in this case
‘card->irq’ is initialized and is bigger than zero. A subsequent call to
‘nj_release’ will free the irq that has not been requested.

Fix this bug by deleting the previous assignment to ‘card->irq’ and just
keep the assignment before ‘request_irq’.

The KASAN’s log reveals it:

[ 3.354615 ] WARNING: CPU: 0 PID: 1 at kernel/irq/manage.c:1826
free_irq+0x100/0x480
[ 3.355112 ] Modules linked in:
[ 3.355310 ] CPU: 0 PID: 1 Comm: swapper/0 Not tainted
5.13.0-rc1-00144-g25a1298726e #13
[ 3.355816 ] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS
rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
[ 3.356552 ] RIP: 0010:free_irq+0x100/0x480
[ 3.356820 ] Code: 6e 08 74 6f 4d 89 f4 e8 5e ac 09 00 4d 8b 74 24 18
4d 85 f6 75 e3 e8 4f ac 09 00 8b 75 c8 48 c7 c7 78 c1 2e 85 e8 e0 cf f5
ff <0f> 0b 48 8b 75 c0 4c 89 ff e8 72 33 0b 03 48 8b 43 40 4c 8b a0 80
[ 3.358012 ] RSP: 0000:ffffc90000017b48 EFLAGS: 00010082
[ 3.358357 ] RAX: 0000000000000000 RBX: ffff888104dc8000 RCX:
0000000000000000
[ 3.358814 ] RDX: ffff8881003c8000 RSI: ffffffff8124a9e6 RDI:
00000000ffffffff
[ 3.359272 ] RBP: ffffc90000017b88 R08: 0000000000000000 R09:
0000000000000000
[ 3.359732 ] R10: ffffc900000179f0 R11: 0000000000001d04 R12:
0000000000000000
[ 3.360195 ] R13: ffff888107dc6000 R14: ffff888107dc6928 R15:
ffff888104dc80a8
[ 3.360652 ] FS: 0000000000000000(0000) GS:ffff88817bc00000(0000)
knlGS:0000000000000000
[ 3.361170 ] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 3.361538 ] CR2: 0000000000000000 CR3: 000000000582e000 CR4:
00000000000006f0
[ 3.362003 ] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[ 3.362175 ] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
[ 3.362175 ] Call Trace:
[ 3.362175 ] nj_release+0x51/0x1e0
[ 3.362175 ] nj_probe+0x450/0x950
[ 3.362175 ] ? pci_device_remove+0x110/0x110
[ 3.362175 ] local_pci_probe+0x45/0xa0
[ 3.362175 ] pci_device_probe+0x12b/0x1d0
[ 3.362175 ] really_probe+0x2a9/0x610
[ 3.362175 ] driver_probe_device+0x90/0x1d0
[ 3.362175 ] ? mutex_lock_nested+0x1b/0x20
[ 3.362175 ] device_driver_attach+0x68/0x70
[ 3.362175 ] __driver_attach+0x124/0x1b0
[ 3.362175 ] ? device_driver_attach+0x70/0x70
[ 3.362175 ] bus_for_each_dev+0xbb/0x110
[ 3.362175 ] ? rdinit_setup+0x45/0x45
[ 3.362175 ] driver_attach+0x27/0x30
[ 3.362175 ] bus_add_driver+0x1eb/0x2a0
[ 3.362175 ] driver_register+0xa9/0x180
[ 3.362175 ] __pci_register_driver+0x82/0x90
[ 3.362175 ] ? w6692_init+0x38/0x38
[ 3.362175 ] nj_init+0x36/0x38
[ 3.362175 ] do_one_initcall+0x7f/0x3d0
[ 3.362175 ] ? rdinit_setup+0x45/0x45
[ 3.362175 ] ? rcu_read_lock_sched_held+0x4f/0x80
[ 3.362175 ] kernel_init_freeable+0x2aa/0x301
[ 3.362175 ] ? rest_init+0x2c0/0x2c0
[ 3.362175 ] kernel_init+0x18/0x190
[ 3.362175 ] ? rest_init+0x2c0/0x2c0
[ 3.362175 ] ? rest_init+0x2c0/0x2c0
[ 3.362175 ] ret_from_fork+0x1f/0x30
[ 3.362175 ] Kernel panic - not syncing: panic_on_warn set …
[ 3.362175 ] CPU: 0 PID: 1 Comm: swapper/0 Not tainted
5.13.0-rc1-00144-g25a1298726e #13
[ 3.362175 ] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS
rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
[ 3.362175 ] Call Trace:
[ 3.362175 ] dump_stack+0xba/0xf5
[ 3.362175 ] ? free_irq+0x100/0x480
[ 3.362175 ] panic+0x15a/0x3f2
[ 3.362175 ] ? __warn+0xf2/0x150
[ 3.362175 ] ? free_irq+0x100/0x480
[ 3.362175 ] __warn+0x108/0x150
[ 3.362175 ] ? free_irq+0x100/0x480
[ 3.362175 ] report_bug+0x119/0x1c0
[ 3.362175 ] handle_bug+0x3b/0x80
[ 3.362175 ] exc_invalid_op+0x18/0x70
[ 3.362175 ] asm_exc_invalid_op+0x12/0x20
[ 3.362175 ] RIP: 0010:free_irq+0x100
—truncated—

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/isdn/hardware/mISDN/netjet.c"
    ],
    "versions": [
      {
        "version": "1da177e4c3f4",
        "lessThan": "958cb1078ca6",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "4c1fcb6ec964",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "a0a37e4454ca",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "bf78e25bd3f4",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "9d7d4649dc1c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "143fc7220961",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "6249193e0370",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "9f6f852550d0",
        "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/isdn/hardware/mISDN/netjet.c"
    ],
    "versions": [
      {
        "version": "4.4.273",
        "lessThanOrEqual": "4.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.9.273",
        "lessThanOrEqual": "4.9.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.14.237",
        "lessThanOrEqual": "4.14.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.19.195",
        "lessThanOrEqual": "4.19.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.126",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.44",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.12.11",
        "lessThanOrEqual": "5.12.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.13",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

6.2 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

13.1%