FKIE_CVE-2026-23369

Vulnerability from fkie_nvd - Published: 2026-03-25 11:16 - Updated: 2026-04-24 16:38
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: i2c: i801: Revert "i2c: i801: replace acpi_lock with I2C bus lock" This reverts commit f707d6b9e7c18f669adfdb443906d46cfbaaa0c1. Under rare circumstances, multiple udev threads can collect i801 device info on boot and walk i801_acpi_io_handler somewhat concurrently. The first will note the area is reserved by acpi to prevent further touches. This ultimately causes the area to be deregistered. The second will enter i801_acpi_io_handler after the area is unregistered but before a check can be made that the area is unregistered. i2c_lock_bus relies on the now unregistered area containing lock_ops to lock the bus. The end result is a kernel panic on boot with the following backtrace; [ 14.971872] ioatdma 0000:09:00.2: enabling device (0100 -> 0102) [ 14.971873] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 14.971880] #PF: supervisor read access in kernel mode [ 14.971884] #PF: error_code(0x0000) - not-present page [ 14.971887] PGD 0 P4D 0 [ 14.971894] Oops: 0000 [#1] PREEMPT SMP PTI [ 14.971900] CPU: 5 PID: 956 Comm: systemd-udevd Not tainted 5.14.0-611.5.1.el9_7.x86_64 #1 [ 14.971905] Hardware name: XXXXXXXXXXXXXXXXXXXXXXX BIOS 1.20.10.SV91 01/30/2023 [ 14.971908] RIP: 0010:i801_acpi_io_handler+0x2d/0xb0 [i2c_i801] [ 14.971929] Code: 00 00 49 8b 40 20 41 57 41 56 4d 8b b8 30 04 00 00 49 89 ce 41 55 41 89 d5 41 54 49 89 f4 be 02 00 00 00 55 4c 89 c5 53 89 fb <48> 8b 00 4c 89 c7 e8 18 61 54 e9 80 bd 80 04 00 00 00 75 09 4c 3b [ 14.971933] RSP: 0018:ffffbaa841483838 EFLAGS: 00010282 [ 14.971938] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff9685e01ba568 [ 14.971941] RDX: 0000000000000008 RSI: 0000000000000002 RDI: 0000000000000000 [ 14.971944] RBP: ffff9685ca22f028 R08: ffff9685ca22f028 R09: ffff9685ca22f028 [ 14.971948] R10: 000000000000000b R11: 0000000000000580 R12: 0000000000000580 [ 14.971951] R13: 0000000000000008 R14: ffff9685e01ba568 R15: ffff9685c222f000 [ 14.971954] FS: 00007f8287c0ab40(0000) GS:ffff96a47f940000(0000) knlGS:0000000000000000 [ 14.971959] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 14.971963] CR2: 0000000000000000 CR3: 0000000168090001 CR4: 00000000003706f0 [ 14.971966] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 14.971968] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 14.971972] Call Trace: [ 14.971977] <TASK> [ 14.971981] ? show_trace_log_lvl+0x1c4/0x2df [ 14.971994] ? show_trace_log_lvl+0x1c4/0x2df [ 14.972003] ? acpi_ev_address_space_dispatch+0x16e/0x3c0 [ 14.972014] ? __die_body.cold+0x8/0xd [ 14.972021] ? page_fault_oops+0x132/0x170 [ 14.972028] ? exc_page_fault+0x61/0x150 [ 14.972036] ? asm_exc_page_fault+0x22/0x30 [ 14.972045] ? i801_acpi_io_handler+0x2d/0xb0 [i2c_i801] [ 14.972061] acpi_ev_address_space_dispatch+0x16e/0x3c0 [ 14.972069] ? __pfx_i801_acpi_io_handler+0x10/0x10 [i2c_i801] [ 14.972085] acpi_ex_access_region+0x5b/0xd0 [ 14.972093] acpi_ex_field_datum_io+0x73/0x2e0 [ 14.972100] acpi_ex_read_data_from_field+0x8e/0x230 [ 14.972106] acpi_ex_resolve_node_to_value+0x23d/0x310 [ 14.972114] acpi_ds_evaluate_name_path+0xad/0x110 [ 14.972121] acpi_ds_exec_end_op+0x321/0x510 [ 14.972127] acpi_ps_parse_loop+0xf7/0x680 [ 14.972136] acpi_ps_parse_aml+0x17a/0x3d0 [ 14.972143] acpi_ps_execute_method+0x137/0x270 [ 14.972150] acpi_ns_evaluate+0x1f4/0x2e0 [ 14.972158] acpi_evaluate_object+0x134/0x2f0 [ 14.972164] acpi_evaluate_integer+0x50/0xe0 [ 14.972173] ? vsnprintf+0x24b/0x570 [ 14.972181] acpi_ac_get_state.part.0+0x23/0x70 [ 14.972189] get_ac_property+0x4e/0x60 [ 14.972195] power_supply_show_property+0x90/0x1f0 [ 14.972205] add_prop_uevent+0x29/0x90 [ 14.972213] power_supply_uevent+0x109/0x1d0 [ 14.972222] dev_uevent+0x10e/0x2f0 [ 14.972228] uevent_show+0x8e/0x100 [ 14.972236] dev_attr_show+0x19 ---truncated---
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1c72e7b0b442ce21a1348d9b8237cfddb67048ebPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9507f9953a2a5647eb42668d0c243fdbd7e72954Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c726273044a5a8308a889d19d6884135c0f3321dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cfc69c2e6c699c96949f7b0455195b0bfb7dc715Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.7
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: i801: Revert \"i2c: i801: replace acpi_lock with I2C bus lock\"\n\nThis reverts commit f707d6b9e7c18f669adfdb443906d46cfbaaa0c1.\n\nUnder rare circumstances, multiple udev threads can collect i801 device\ninfo on boot and walk i801_acpi_io_handler somewhat concurrently. The\nfirst will note the area is reserved by acpi to prevent further touches.\nThis ultimately causes the area to be deregistered. The second will\nenter i801_acpi_io_handler after the area is unregistered but before a\ncheck can be made that the area is unregistered. i2c_lock_bus relies on\nthe now unregistered area containing lock_ops to lock the bus. The end\nresult is a kernel panic on boot with the following backtrace;\n\n[   14.971872] ioatdma 0000:09:00.2: enabling device (0100 -\u003e 0102)\n[   14.971873] BUG: kernel NULL pointer dereference, address: 0000000000000000\n[   14.971880] #PF: supervisor read access in kernel mode\n[   14.971884] #PF: error_code(0x0000) - not-present page\n[   14.971887] PGD 0 P4D 0\n[   14.971894] Oops: 0000 [#1] PREEMPT SMP PTI\n[   14.971900] CPU: 5 PID: 956 Comm: systemd-udevd Not tainted 5.14.0-611.5.1.el9_7.x86_64 #1\n[   14.971905] Hardware name: XXXXXXXXXXXXXXXXXXXXXXX BIOS 1.20.10.SV91 01/30/2023\n[   14.971908] RIP: 0010:i801_acpi_io_handler+0x2d/0xb0 [i2c_i801]\n[   14.971929] Code: 00 00 49 8b 40 20 41 57 41 56 4d 8b b8 30 04 00 00 49 89 ce 41 55 41 89 d5 41 54 49 89 f4 be 02 00 00 00 55 4c 89 c5 53 89 fb \u003c48\u003e 8b 00 4c 89 c7 e8 18 61 54 e9 80 bd 80 04 00 00 00 75 09 4c 3b\n[   14.971933] RSP: 0018:ffffbaa841483838 EFLAGS: 00010282\n[   14.971938] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff9685e01ba568\n[   14.971941] RDX: 0000000000000008 RSI: 0000000000000002 RDI: 0000000000000000\n[   14.971944] RBP: ffff9685ca22f028 R08: ffff9685ca22f028 R09: ffff9685ca22f028\n[   14.971948] R10: 000000000000000b R11: 0000000000000580 R12: 0000000000000580\n[   14.971951] R13: 0000000000000008 R14: ffff9685e01ba568 R15: ffff9685c222f000\n[   14.971954] FS:  00007f8287c0ab40(0000) GS:ffff96a47f940000(0000) knlGS:0000000000000000\n[   14.971959] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[   14.971963] CR2: 0000000000000000 CR3: 0000000168090001 CR4: 00000000003706f0\n[   14.971966] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[   14.971968] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n[   14.971972] Call Trace:\n[   14.971977]  \u003cTASK\u003e\n[   14.971981]  ? show_trace_log_lvl+0x1c4/0x2df\n[   14.971994]  ? show_trace_log_lvl+0x1c4/0x2df\n[   14.972003]  ? acpi_ev_address_space_dispatch+0x16e/0x3c0\n[   14.972014]  ? __die_body.cold+0x8/0xd\n[   14.972021]  ? page_fault_oops+0x132/0x170\n[   14.972028]  ? exc_page_fault+0x61/0x150\n[   14.972036]  ? asm_exc_page_fault+0x22/0x30\n[   14.972045]  ? i801_acpi_io_handler+0x2d/0xb0 [i2c_i801]\n[   14.972061]  acpi_ev_address_space_dispatch+0x16e/0x3c0\n[   14.972069]  ? __pfx_i801_acpi_io_handler+0x10/0x10 [i2c_i801]\n[   14.972085]  acpi_ex_access_region+0x5b/0xd0\n[   14.972093]  acpi_ex_field_datum_io+0x73/0x2e0\n[   14.972100]  acpi_ex_read_data_from_field+0x8e/0x230\n[   14.972106]  acpi_ex_resolve_node_to_value+0x23d/0x310\n[   14.972114]  acpi_ds_evaluate_name_path+0xad/0x110\n[   14.972121]  acpi_ds_exec_end_op+0x321/0x510\n[   14.972127]  acpi_ps_parse_loop+0xf7/0x680\n[   14.972136]  acpi_ps_parse_aml+0x17a/0x3d0\n[   14.972143]  acpi_ps_execute_method+0x137/0x270\n[   14.972150]  acpi_ns_evaluate+0x1f4/0x2e0\n[   14.972158]  acpi_evaluate_object+0x134/0x2f0\n[   14.972164]  acpi_evaluate_integer+0x50/0xe0\n[   14.972173]  ? vsnprintf+0x24b/0x570\n[   14.972181]  acpi_ac_get_state.part.0+0x23/0x70\n[   14.972189]  get_ac_property+0x4e/0x60\n[   14.972195]  power_supply_show_property+0x90/0x1f0\n[   14.972205]  add_prop_uevent+0x29/0x90\n[   14.972213]  power_supply_uevent+0x109/0x1d0\n[   14.972222]  dev_uevent+0x10e/0x2f0\n[   14.972228]  uevent_show+0x8e/0x100\n[   14.972236]  dev_attr_show+0x19\n---truncated---"
    }
  ],
  "id": "CVE-2026-23369",
  "lastModified": "2026-04-24T16:38:18.080",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-03-25T11:16:36.347",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/1c72e7b0b442ce21a1348d9b8237cfddb67048eb"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/9507f9953a2a5647eb42668d0c243fdbd7e72954"
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    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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      "url": "https://git.kernel.org/stable/c/c726273044a5a8308a889d19d6884135c0f3321d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/cfc69c2e6c699c96949f7b0455195b0bfb7dc715"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.