fkie_cve-2025-68229
Vulnerability from fkie_nvd
Published
2025-12-16 14:15
Modified
2025-12-18 15:08
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: scsi: target: tcm_loop: Fix segfault in tcm_loop_tpg_address_show() If the allocation of tl_hba->sh fails in tcm_loop_driver_probe() and we attempt to dereference it in tcm_loop_tpg_address_show() we will get a segfault, see below for an example. So, check tl_hba->sh before dereferencing it. Unable to allocate struct scsi_host BUG: kernel NULL pointer dereference, address: 0000000000000194 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: 0000 [#1] PREEMPT SMP NOPTI CPU: 1 PID: 8356 Comm: tokio-runtime-w Not tainted 6.6.104.2-4.azl3 #1 Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 09/28/2024 RIP: 0010:tcm_loop_tpg_address_show+0x2e/0x50 [tcm_loop] ... Call Trace: <TASK> configfs_read_iter+0x12d/0x1d0 [configfs] vfs_read+0x1b5/0x300 ksys_read+0x6f/0xf0 ...
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/13aff3b8a7184281b134698704d6c06863a8361b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1c9ba455b5073253ceaadae4859546e38e8261fe
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3d8c517f6eb27e47b1a198e05f8023038329b40b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/63f511d3855f7f4b35dd63dbc58fc3d935a81268
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/72e8831079266749a7023618a0de2f289a9dced6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a6ef60898ddaf1414592ce3e5b0d94276d631663
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e6965188f84a7883e6a0d3448e86b0cf29b24dfc
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f449a1edd7a13bb025aaf9342ea6f8bf92684bbf
Impacted products
Vendor Product Version


To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: target: tcm_loop: Fix segfault in tcm_loop_tpg_address_show()\n\nIf the allocation of tl_hba-\u003esh fails in tcm_loop_driver_probe() and we\nattempt to dereference it in tcm_loop_tpg_address_show() we will get a\nsegfault, see below for an example. So, check tl_hba-\u003esh before\ndereferencing it.\n\n  Unable to allocate struct scsi_host\n  BUG: kernel NULL pointer dereference, address: 0000000000000194\n  #PF: supervisor read access in kernel mode\n  #PF: error_code(0x0000) - not-present page\n  PGD 0 P4D 0\n  Oops: 0000 [#1] PREEMPT SMP NOPTI\n  CPU: 1 PID: 8356 Comm: tokio-runtime-w Not tainted 6.6.104.2-4.azl3 #1\n  Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 09/28/2024\n  RIP: 0010:tcm_loop_tpg_address_show+0x2e/0x50 [tcm_loop]\n...\n  Call Trace:\n   \u003cTASK\u003e\n   configfs_read_iter+0x12d/0x1d0 [configfs]\n   vfs_read+0x1b5/0x300\n   ksys_read+0x6f/0xf0\n..."
    }
  ],
  "id": "CVE-2025-68229",
  "lastModified": "2025-12-18T15:08:06.237",
  "metrics": {},
  "published": "2025-12-16T14:15:57.067",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/13aff3b8a7184281b134698704d6c06863a8361b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1c9ba455b5073253ceaadae4859546e38e8261fe"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3d8c517f6eb27e47b1a198e05f8023038329b40b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/63f511d3855f7f4b35dd63dbc58fc3d935a81268"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/72e8831079266749a7023618a0de2f289a9dced6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a6ef60898ddaf1414592ce3e5b0d94276d631663"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e6965188f84a7883e6a0d3448e86b0cf29b24dfc"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f449a1edd7a13bb025aaf9342ea6f8bf92684bbf"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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