cve-2021-47077
Vulnerability from cvelistv5
Published
2024-03-01 21:15
Modified
2024-11-04 11:58
Severity ?
Summary
scsi: qedf: Add pointer checks in qedf_update_link_speed()
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/11014efcec378bb0050a6cf08eaf375e3693400a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/73578af92a0fae6609b955fcc9113e50e413c80f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a6362a737572f66051deb7637f3f77ddf7a4402f
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website

To clipboard 

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                "id": "CVE-2021-47077",
                "options": [
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      "affected": [
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          "product": "Linux",
          "programFiles": [
            "drivers/scsi/qedf/qedf_main.c"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qedf: Add pointer checks in qedf_update_link_speed()\n\nThe following trace was observed:\n\n [   14.042059] Call Trace:\n [   14.042061]  \u003cIRQ\u003e\n [   14.042068]  qedf_link_update+0x144/0x1f0 [qedf]\n [   14.042117]  qed_link_update+0x5c/0x80 [qed]\n [   14.042135]  qed_mcp_handle_link_change+0x2d2/0x410 [qed]\n [   14.042155]  ? qed_set_ptt+0x70/0x80 [qed]\n [   14.042170]  ? qed_set_ptt+0x70/0x80 [qed]\n [   14.042186]  ? qed_rd+0x13/0x40 [qed]\n [   14.042205]  qed_mcp_handle_events+0x437/0x690 [qed]\n [   14.042221]  ? qed_set_ptt+0x70/0x80 [qed]\n [   14.042239]  qed_int_sp_dpc+0x3a6/0x3e0 [qed]\n [   14.042245]  tasklet_action_common.isra.14+0x5a/0x100\n [   14.042250]  __do_softirq+0xe4/0x2f8\n [   14.042253]  irq_exit+0xf7/0x100\n [   14.042255]  do_IRQ+0x7f/0xd0\n [   14.042257]  common_interrupt+0xf/0xf\n [   14.042259]  \u003c/IRQ\u003e\n\nAPI qedf_link_update() is getting called from QED but by that time\nshost_data is not initialised. This results in a NULL pointer dereference\nwhen we try to dereference shost_data while updating supported_speeds.\n\nAdd a NULL pointer check before dereferencing shost_data."
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        "dateUpdated": "2024-11-04T11:58:59.287Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47077",
    "datePublished": "2024-03-01T21:15:14.030Z",
    "dateReserved": "2024-02-29T22:33:44.297Z",
    "dateUpdated": "2024-11-04T11:58:59.287Z",
    "state": "PUBLISHED"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47077\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-03-01T22:15:47.283\",\"lastModified\":\"2024-03-01T22:22:25.913\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nscsi: qedf: Add pointer checks in qedf_update_link_speed()\\n\\nThe following trace was observed:\\n\\n [   14.042059] Call Trace:\\n [   14.042061]  \u003cIRQ\u003e\\n [   14.042068]  qedf_link_update+0x144/0x1f0 [qedf]\\n [   14.042117]  qed_link_update+0x5c/0x80 [qed]\\n [   14.042135]  qed_mcp_handle_link_change+0x2d2/0x410 [qed]\\n [   14.042155]  ? qed_set_ptt+0x70/0x80 [qed]\\n [   14.042170]  ? qed_set_ptt+0x70/0x80 [qed]\\n [   14.042186]  ? qed_rd+0x13/0x40 [qed]\\n [   14.042205]  qed_mcp_handle_events+0x437/0x690 [qed]\\n [   14.042221]  ? qed_set_ptt+0x70/0x80 [qed]\\n [   14.042239]  qed_int_sp_dpc+0x3a6/0x3e0 [qed]\\n [   14.042245]  tasklet_action_common.isra.14+0x5a/0x100\\n [   14.042250]  __do_softirq+0xe4/0x2f8\\n [   14.042253]  irq_exit+0xf7/0x100\\n [   14.042255]  do_IRQ+0x7f/0xd0\\n [   14.042257]  common_interrupt+0xf/0xf\\n [   14.042259]  \u003c/IRQ\u003e\\n\\nAPI qedf_link_update() is getting called from QED but by that time\\nshost_data is not initialised. This results in a NULL pointer dereference\\nwhen we try to dereference shost_data while updating supported_speeds.\\n\\nAdd a NULL pointer check before dereferencing shost_data.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: scsi: qedf: Agregar comprobaciones de puntero en qedf_update_link_speed() Se observ\u00f3 el siguiente seguimiento: [ 14.042059] Seguimiento de llamadas: [ 14.042061]  [ 14.042068] qedf_link_update+0x144/0x1f0 [ qedf] [14.042117] qed_link_update+0x5c/0x80 [qed] [14.042135] qed_mcp_handle_link_change+0x2d2/0x410 [qed] [14.042155]? qed_set_ptt+0x70/0x80 [qed] [14.042170]? qed_set_ptt+0x70/0x80 [qed] [14.042186]? qed_rd+0x13/0x40 [qed] [ 14.042205] qed_mcp_handle_events+0x437/0x690 [qed] [ 14.042221] ? qed_set_ptt+0x70/0x80 [qed] [ 14.042239] qed_int_sp_dpc+0x3a6/0x3e0 [qed] [ 14.042245] tasklet_action_common.isra.14+0x5a/0x100 [ 14.042250] __do_softirq+0xe4/0x2f8 [ 14.042253] salida_irq+0xf7/0x100 [ 14.042255] do_IRQ+0x7f/0xd0 [ 14.042257] common_interrupt+0xf/0xf [ 14.042259]  API qedf_link_update() est\u00e1 siendo llamada desde QED pero en ese momento shost_data no est\u00e1 inicializado. Esto da como resultado una desreferencia del puntero NULL cuando intentamos desreferenciar shost_data mientras actualizamos las velocidades_compatibles. Agregue una verificaci\u00f3n de puntero NULL antes de eliminar la referencia a shost_data.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/11014efcec378bb0050a6cf08eaf375e3693400a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/73578af92a0fae6609b955fcc9113e50e413c80f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a6362a737572f66051deb7637f3f77ddf7a4402f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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