ghsa-6cf5-rv3h-c7jx
Vulnerability from github
Published
2024-09-18 09:30
Modified
2024-09-20 21:31
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

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

Bluetooth: btnxpuart: Fix Null pointer dereference in btnxpuart_flush()

This adds a check before freeing the rx->skb in flush and close functions to handle the kernel crash seen while removing driver after FW download fails or before FW download completes.

dmesg log: [ 54.634586] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000080 [ 54.643398] Mem abort info: [ 54.646204] ESR = 0x0000000096000004 [ 54.649964] EC = 0x25: DABT (current EL), IL = 32 bits [ 54.655286] SET = 0, FnV = 0 [ 54.658348] EA = 0, S1PTW = 0 [ 54.661498] FSC = 0x04: level 0 translation fault [ 54.666391] Data abort info: [ 54.669273] ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000 [ 54.674768] CM = 0, WnR = 0, TnD = 0, TagAccess = 0 [ 54.674771] GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 [ 54.674775] user pgtable: 4k pages, 48-bit VAs, pgdp=0000000048860000 [ 54.674780] [0000000000000080] pgd=0000000000000000, p4d=0000000000000000 [ 54.703880] Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP [ 54.710152] Modules linked in: btnxpuart(-) overlay fsl_jr_uio caam_jr caamkeyblob_desc caamhash_desc caamalg_desc crypto_engine authenc libdes crct10dif_ce polyval_ce polyval_generic snd_soc_imx_spdif snd_soc_imx_card snd_soc_ak5558 snd_soc_ak4458 caam secvio error snd_soc_fsl_micfil snd_soc_fsl_spdif snd_soc_fsl_sai snd_soc_fsl_utils imx_pcm_dma gpio_ir_recv rc_core sch_fq_codel fuse [ 54.744357] CPU: 3 PID: 72 Comm: kworker/u9:0 Not tainted 6.6.3-otbr-g128004619037 #2 [ 54.744364] Hardware name: FSL i.MX8MM EVK board (DT) [ 54.744368] Workqueue: hci0 hci_power_on [ 54.757244] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 54.757249] pc : kfree_skb_reason+0x18/0xb0 [ 54.772299] lr : btnxpuart_flush+0x40/0x58 [btnxpuart] [ 54.782921] sp : ffff8000805ebca0 [ 54.782923] x29: ffff8000805ebca0 x28: ffffa5c6cf1869c0 x27: ffffa5c6cf186000 [ 54.782931] x26: ffff377b84852400 x25: ffff377b848523c0 x24: ffff377b845e7230 [ 54.782938] x23: ffffa5c6ce8dbe08 x22: ffffa5c6ceb65410 x21: 00000000ffffff92 [ 54.782945] x20: ffffa5c6ce8dbe98 x19: ffffffffffffffac x18: ffffffffffffffff [ 54.807651] x17: 0000000000000000 x16: ffffa5c6ce2824ec x15: ffff8001005eb857 [ 54.821917] x14: 0000000000000000 x13: ffffa5c6cf1a02e0 x12: 0000000000000642 [ 54.821924] x11: 0000000000000040 x10: ffffa5c6cf19d690 x9 : ffffa5c6cf19d688 [ 54.821931] x8 : ffff377b86000028 x7 : 0000000000000000 x6 : 0000000000000000 [ 54.821938] x5 : ffff377b86000000 x4 : 0000000000000000 x3 : 0000000000000000 [ 54.843331] x2 : 0000000000000000 x1 : 0000000000000002 x0 : ffffffffffffffac [ 54.857599] Call trace: [ 54.857601] kfree_skb_reason+0x18/0xb0 [ 54.863878] btnxpuart_flush+0x40/0x58 [btnxpuart] [ 54.863888] hci_dev_open_sync+0x3a8/0xa04 [ 54.872773] hci_power_on+0x54/0x2e4 [ 54.881832] process_one_work+0x138/0x260 [ 54.881842] worker_thread+0x32c/0x438 [ 54.881847] kthread+0x118/0x11c [ 54.881853] ret_from_fork+0x10/0x20 [ 54.896406] Code: a9be7bfd 910003fd f9000bf3 aa0003f3 (b940d400) [ 54.896410] ---[ end trace 0000000000000000 ]---

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{
  "affected": [],
  "aliases": [
    "CVE-2024-46749"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-09-18T08:15:03Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: btnxpuart: Fix Null pointer dereference in btnxpuart_flush()\n\nThis adds a check before freeing the rx-\u003eskb in flush and close\nfunctions to handle the kernel crash seen while removing driver after FW\ndownload fails or before FW download completes.\n\ndmesg log:\n[   54.634586] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000080\n[   54.643398] Mem abort info:\n[   54.646204]   ESR = 0x0000000096000004\n[   54.649964]   EC = 0x25: DABT (current EL), IL = 32 bits\n[   54.655286]   SET = 0, FnV = 0\n[   54.658348]   EA = 0, S1PTW = 0\n[   54.661498]   FSC = 0x04: level 0 translation fault\n[   54.666391] Data abort info:\n[   54.669273]   ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000\n[   54.674768]   CM = 0, WnR = 0, TnD = 0, TagAccess = 0\n[   54.674771]   GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0\n[   54.674775] user pgtable: 4k pages, 48-bit VAs, pgdp=0000000048860000\n[   54.674780] [0000000000000080] pgd=0000000000000000, p4d=0000000000000000\n[   54.703880] Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP\n[   54.710152] Modules linked in: btnxpuart(-) overlay fsl_jr_uio caam_jr caamkeyblob_desc caamhash_desc caamalg_desc crypto_engine authenc libdes crct10dif_ce polyval_ce polyval_generic snd_soc_imx_spdif snd_soc_imx_card snd_soc_ak5558 snd_soc_ak4458 caam secvio error snd_soc_fsl_micfil snd_soc_fsl_spdif snd_soc_fsl_sai snd_soc_fsl_utils imx_pcm_dma gpio_ir_recv rc_core sch_fq_codel fuse\n[   54.744357] CPU: 3 PID: 72 Comm: kworker/u9:0 Not tainted 6.6.3-otbr-g128004619037 #2\n[   54.744364] Hardware name: FSL i.MX8MM EVK board (DT)\n[   54.744368] Workqueue: hci0 hci_power_on\n[   54.757244] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n[   54.757249] pc : kfree_skb_reason+0x18/0xb0\n[   54.772299] lr : btnxpuart_flush+0x40/0x58 [btnxpuart]\n[   54.782921] sp : ffff8000805ebca0\n[   54.782923] x29: ffff8000805ebca0 x28: ffffa5c6cf1869c0 x27: ffffa5c6cf186000\n[   54.782931] x26: ffff377b84852400 x25: ffff377b848523c0 x24: ffff377b845e7230\n[   54.782938] x23: ffffa5c6ce8dbe08 x22: ffffa5c6ceb65410 x21: 00000000ffffff92\n[   54.782945] x20: ffffa5c6ce8dbe98 x19: ffffffffffffffac x18: ffffffffffffffff\n[   54.807651] x17: 0000000000000000 x16: ffffa5c6ce2824ec x15: ffff8001005eb857\n[   54.821917] x14: 0000000000000000 x13: ffffa5c6cf1a02e0 x12: 0000000000000642\n[   54.821924] x11: 0000000000000040 x10: ffffa5c6cf19d690 x9 : ffffa5c6cf19d688\n[   54.821931] x8 : ffff377b86000028 x7 : 0000000000000000 x6 : 0000000000000000\n[   54.821938] x5 : ffff377b86000000 x4 : 0000000000000000 x3 : 0000000000000000\n[   54.843331] x2 : 0000000000000000 x1 : 0000000000000002 x0 : ffffffffffffffac\n[   54.857599] Call trace:\n[   54.857601]  kfree_skb_reason+0x18/0xb0\n[   54.863878]  btnxpuart_flush+0x40/0x58 [btnxpuart]\n[   54.863888]  hci_dev_open_sync+0x3a8/0xa04\n[   54.872773]  hci_power_on+0x54/0x2e4\n[   54.881832]  process_one_work+0x138/0x260\n[   54.881842]  worker_thread+0x32c/0x438\n[   54.881847]  kthread+0x118/0x11c\n[   54.881853]  ret_from_fork+0x10/0x20\n[   54.896406] Code: a9be7bfd 910003fd f9000bf3 aa0003f3 (b940d400)\n[   54.896410] ---[ end trace 0000000000000000 ]---",
  "id": "GHSA-6cf5-rv3h-c7jx",
  "modified": "2024-09-20T21:31:38Z",
  "published": "2024-09-18T09:30:36Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-46749"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/013dae4735d2010544d1f2121bdeb8e6c9ea171e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/056e0cd381d59a9124b7c43dd715e15f56a11635"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c68bbf5e334b35b36ac5b9f0419f1f93f796bad1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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