CVE-2021-47290 (GCVE-0-2021-47290)

Vulnerability from cvelistv5 – Published: 2024-05-21 14:35 – Updated: 2026-05-11 13:51
VLAI
Title
scsi: target: Fix NULL dereference on XCOPY completion
Summary
In the Linux kernel, the following vulnerability has been resolved: scsi: target: Fix NULL dereference on XCOPY completion CPU affinity control added with commit 39ae3edda325 ("scsi: target: core: Make completion affinity configurable") makes target_complete_cmd() queue work on a CPU based on se_tpg->se_tpg_wwn->cmd_compl_affinity state. LIO's EXTENDED COPY worker is a special case in that read/write cmds are dispatched using the global xcopy_pt_tpg, which carries a NULL se_tpg_wwn pointer following initialization in target_xcopy_setup_pt(). The NULL xcopy_pt_tpg->se_tpg_wwn pointer is dereferenced on completion of any EXTENDED COPY initiated read/write cmds. E.g using the libiscsi SCSI.ExtendedCopy.Simple test: BUG: kernel NULL pointer dereference, address: 00000000000001a8 RIP: 0010:target_complete_cmd+0x9d/0x130 [target_core_mod] Call Trace: fd_execute_rw+0x148/0x42a [target_core_file] ? __dynamic_pr_debug+0xa7/0xe0 ? target_check_reservation+0x5b/0x940 [target_core_mod] __target_execute_cmd+0x1e/0x90 [target_core_mod] transport_generic_new_cmd+0x17c/0x330 [target_core_mod] target_xcopy_issue_pt_cmd+0x9/0x60 [target_core_mod] target_xcopy_read_source.isra.7+0x10b/0x1b0 [target_core_mod] ? target_check_fua+0x40/0x40 [target_core_mod] ? transport_complete_task_attr+0x130/0x130 [target_core_mod] target_xcopy_do_work+0x61f/0xc00 [target_core_mod] This fix makes target_complete_cmd() queue work on se_cmd->cpuid if se_tpg_wwn is NULL.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 39ae3edda325e9cf9e978c9788affe88231f3b34 , < e7732c5a19a15a62b0b23fd683a639b0483e1f40 (git)
Affected: 39ae3edda325e9cf9e978c9788affe88231f3b34 , < a47fa41381a09e5997afd762664db4f5f6657e03 (git)
Create a notification for this product.
Linux Linux Affected: 5.13
Unaffected: 0 , < 5.13 (semver)
Unaffected: 5.13.6 , ≤ 5.13.* (semver)
Unaffected: 5.14 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T05:32:07.995Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/e7732c5a19a15a62b0b23fd683a639b0483e1f40"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/a47fa41381a09e5997afd762664db4f5f6657e03"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-47290",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T15:39:25.848722Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-11T17:33:09.831Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/target/target_core_transport.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "e7732c5a19a15a62b0b23fd683a639b0483e1f40",
              "status": "affected",
              "version": "39ae3edda325e9cf9e978c9788affe88231f3b34",
              "versionType": "git"
            },
            {
              "lessThan": "a47fa41381a09e5997afd762664db4f5f6657e03",
              "status": "affected",
              "version": "39ae3edda325e9cf9e978c9788affe88231f3b34",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/target/target_core_transport.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.13"
            },
            {
              "lessThan": "5.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.13.*",
              "status": "unaffected",
              "version": "5.13.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.14",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.13.6",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.14",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: target: Fix NULL dereference on XCOPY completion\n\nCPU affinity control added with commit 39ae3edda325 (\"scsi: target: core:\nMake completion affinity configurable\") makes target_complete_cmd() queue\nwork on a CPU based on se_tpg-\u003ese_tpg_wwn-\u003ecmd_compl_affinity state.\n\nLIO\u0027s EXTENDED COPY worker is a special case in that read/write cmds are\ndispatched using the global xcopy_pt_tpg, which carries a NULL se_tpg_wwn\npointer following initialization in target_xcopy_setup_pt().\n\nThe NULL xcopy_pt_tpg-\u003ese_tpg_wwn pointer is dereferenced on completion of\nany EXTENDED COPY initiated read/write cmds. E.g using the libiscsi\nSCSI.ExtendedCopy.Simple test:\n\n  BUG: kernel NULL pointer dereference, address: 00000000000001a8\n  RIP: 0010:target_complete_cmd+0x9d/0x130 [target_core_mod]\n  Call Trace:\n   fd_execute_rw+0x148/0x42a [target_core_file]\n   ? __dynamic_pr_debug+0xa7/0xe0\n   ? target_check_reservation+0x5b/0x940 [target_core_mod]\n   __target_execute_cmd+0x1e/0x90 [target_core_mod]\n   transport_generic_new_cmd+0x17c/0x330 [target_core_mod]\n   target_xcopy_issue_pt_cmd+0x9/0x60 [target_core_mod]\n   target_xcopy_read_source.isra.7+0x10b/0x1b0 [target_core_mod]\n   ? target_check_fua+0x40/0x40 [target_core_mod]\n   ? transport_complete_task_attr+0x130/0x130 [target_core_mod]\n   target_xcopy_do_work+0x61f/0xc00 [target_core_mod]\n\nThis fix makes target_complete_cmd() queue work on se_cmd-\u003ecpuid if\nse_tpg_wwn is NULL."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T13:51:37.777Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/e7732c5a19a15a62b0b23fd683a639b0483e1f40"
        },
        {
          "url": "https://git.kernel.org/stable/c/a47fa41381a09e5997afd762664db4f5f6657e03"
        }
      ],
      "title": "scsi: target: Fix NULL dereference on XCOPY completion",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47290",
    "datePublished": "2024-05-21T14:35:15.411Z",
    "dateReserved": "2024-05-21T13:27:52.129Z",
    "dateUpdated": "2026-05-11T13:51:37.777Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2021-47290",
      "date": "2026-07-15",
      "epss": "0.00193",
      "percentile": "0.09211"
    },
    "fkie_nvd": {
      "configurations": "[{\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"5.13\", \"versionEndExcluding\": \"5.13.6\", \"matchCriteriaId\": \"00CAF7AA-B763-4138-B0F1-E2450358E207\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:5.14:rc1:*:*:*:*:*:*\", \"matchCriteriaId\": \"71268287-21A8-4488-AA4F-23C473153131\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:5.14:rc2:*:*:*:*:*:*\", \"matchCriteriaId\": \"23B9E5C6-FAB5-4A02-9E39-27C8787B0991\"}]}]}]",
      "descriptions": "[{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nscsi: target: Fix NULL dereference on XCOPY completion\\n\\nCPU affinity control added with commit 39ae3edda325 (\\\"scsi: target: core:\\nMake completion affinity configurable\\\") makes target_complete_cmd() queue\\nwork on a CPU based on se_tpg-\u003ese_tpg_wwn-\u003ecmd_compl_affinity state.\\n\\nLIO\u0027s EXTENDED COPY worker is a special case in that read/write cmds are\\ndispatched using the global xcopy_pt_tpg, which carries a NULL se_tpg_wwn\\npointer following initialization in target_xcopy_setup_pt().\\n\\nThe NULL xcopy_pt_tpg-\u003ese_tpg_wwn pointer is dereferenced on completion of\\nany EXTENDED COPY initiated read/write cmds. E.g using the libiscsi\\nSCSI.ExtendedCopy.Simple test:\\n\\n  BUG: kernel NULL pointer dereference, address: 00000000000001a8\\n  RIP: 0010:target_complete_cmd+0x9d/0x130 [target_core_mod]\\n  Call Trace:\\n   fd_execute_rw+0x148/0x42a [target_core_file]\\n   ? __dynamic_pr_debug+0xa7/0xe0\\n   ? target_check_reservation+0x5b/0x940 [target_core_mod]\\n   __target_execute_cmd+0x1e/0x90 [target_core_mod]\\n   transport_generic_new_cmd+0x17c/0x330 [target_core_mod]\\n   target_xcopy_issue_pt_cmd+0x9/0x60 [target_core_mod]\\n   target_xcopy_read_source.isra.7+0x10b/0x1b0 [target_core_mod]\\n   ? target_check_fua+0x40/0x40 [target_core_mod]\\n   ? transport_complete_task_attr+0x130/0x130 [target_core_mod]\\n   target_xcopy_do_work+0x61f/0xc00 [target_core_mod]\\n\\nThis fix makes target_complete_cmd() queue work on se_cmd-\u003ecpuid if\\nse_tpg_wwn is NULL.\"}, {\"lang\": \"es\", \"value\": \"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: scsi: target: corrige la desreferencia NULL al completar XCOPY. El control de afinidad de CPU agregado con la confirmaci\\u00f3n 39ae3edda325 (\\\"scsi: target: core: hace que la afinidad de finalizaci\\u00f3n sea configurable\\\") hace que la cola target_complete_cmd() funcione una CPU basada en el estado se_tpg-\u0026gt;se_tpg_wwn-\u0026gt;cmd_compl_affinity. El trabajador de COPIA EXTENDIDA de LIO es un caso especial en el que los cmds de lectura/escritura se env\\u00edan utilizando el xcopy_pt_tpg global, que lleva un puntero NULL se_tpg_wwn despu\\u00e9s de la inicializaci\\u00f3n en target_xcopy_setup_pt(). Se elimina la referencia al puntero NULL xcopy_pt_tpg-\u0026gt;se_tpg_wwn al finalizar cualquier cmd de lectura/escritura iniciado por COPIA EXTENDIDA. Por ejemplo, utilizando la prueba libiscsi SCSI.ExtendedCopy.Simple: BUG: desreferencia del puntero NULL del kernel, direcci\\u00f3n: 00000000000001a8 RIP: 0010:target_complete_cmd+0x9d/0x130 [target_core_mod] Seguimiento de llamadas: fd_execute_rw+0x148/0x42a [target_core_file] __dynamic_pr_debug+0xa7/0xe0? target_check_reservation+0x5b/0x940 [target_core_mod] __target_execute_cmd+0x1e/0x90 [target_core_mod] transport_generic_new_cmd+0x17c/0x330 [target_core_mod] target_xcopy_issue_pt_cmd+0x9/0x60 [target_core_mod] target_xcopy_read_source.isra.7 +0x10b/0x1b0 [target_core_mod] ? target_check_fua+0x40/0x40 [target_core_mod]? transport_complete_task_attr+0x130/0x130 [target_core_mod] target_xcopy_do_work+0x61f/0xc00 [target_core_mod] Esta soluci\\u00f3n hace que la cola target_complete_cmd() funcione en se_cmd-\u0026gt;cpuid si se_tpg_wwn es NULL.\"}]",
      "id": "CVE-2021-47290",
      "lastModified": "2024-12-23T16:47:17.957",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\", \"baseScore\": 5.5, \"baseSeverity\": \"MEDIUM\", \"attackVector\": \"LOCAL\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"LOW\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 1.8, \"impactScore\": 3.6}]}",
      "published": "2024-05-21T15:15:17.027",
      "references": "[{\"url\": \"https://git.kernel.org/stable/c/a47fa41381a09e5997afd762664db4f5f6657e03\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/e7732c5a19a15a62b0b23fd683a639b0483e1f40\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/a47fa41381a09e5997afd762664db4f5f6657e03\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/e7732c5a19a15a62b0b23fd683a639b0483e1f40\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}]",
      "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "vulnStatus": "Analyzed",
      "weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-476\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47290\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-21T15:15:17.027\",\"lastModified\":\"2026-06-17T04:17:06.960\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nscsi: target: Fix NULL dereference on XCOPY completion\\n\\nCPU affinity control added with commit 39ae3edda325 (\\\"scsi: target: core:\\nMake completion affinity configurable\\\") makes target_complete_cmd() queue\\nwork on a CPU based on se_tpg-\u003ese_tpg_wwn-\u003ecmd_compl_affinity state.\\n\\nLIO\u0027s EXTENDED COPY worker is a special case in that read/write cmds are\\ndispatched using the global xcopy_pt_tpg, which carries a NULL se_tpg_wwn\\npointer following initialization in target_xcopy_setup_pt().\\n\\nThe NULL xcopy_pt_tpg-\u003ese_tpg_wwn pointer is dereferenced on completion of\\nany EXTENDED COPY initiated read/write cmds. E.g using the libiscsi\\nSCSI.ExtendedCopy.Simple test:\\n\\n  BUG: kernel NULL pointer dereference, address: 00000000000001a8\\n  RIP: 0010:target_complete_cmd+0x9d/0x130 [target_core_mod]\\n  Call Trace:\\n   fd_execute_rw+0x148/0x42a [target_core_file]\\n   ? __dynamic_pr_debug+0xa7/0xe0\\n   ? target_check_reservation+0x5b/0x940 [target_core_mod]\\n   __target_execute_cmd+0x1e/0x90 [target_core_mod]\\n   transport_generic_new_cmd+0x17c/0x330 [target_core_mod]\\n   target_xcopy_issue_pt_cmd+0x9/0x60 [target_core_mod]\\n   target_xcopy_read_source.isra.7+0x10b/0x1b0 [target_core_mod]\\n   ? target_check_fua+0x40/0x40 [target_core_mod]\\n   ? transport_complete_task_attr+0x130/0x130 [target_core_mod]\\n   target_xcopy_do_work+0x61f/0xc00 [target_core_mod]\\n\\nThis fix makes target_complete_cmd() queue work on se_cmd-\u003ecpuid if\\nse_tpg_wwn is NULL.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: scsi: target: corrige la desreferencia NULL al completar XCOPY. El control de afinidad de CPU agregado con la confirmaci\u00f3n 39ae3edda325 (\\\"scsi: target: core: hace que la afinidad de finalizaci\u00f3n sea configurable\\\") hace que la cola target_complete_cmd() funcione una CPU basada en el estado se_tpg-\u0026gt;se_tpg_wwn-\u0026gt;cmd_compl_affinity. El trabajador de COPIA EXTENDIDA de LIO es un caso especial en el que los cmds de lectura/escritura se env\u00edan utilizando el xcopy_pt_tpg global, que lleva un puntero NULL se_tpg_wwn despu\u00e9s de la inicializaci\u00f3n en target_xcopy_setup_pt(). Se elimina la referencia al puntero NULL xcopy_pt_tpg-\u0026gt;se_tpg_wwn al finalizar cualquier cmd de lectura/escritura iniciado por COPIA EXTENDIDA. Por ejemplo, utilizando la prueba libiscsi SCSI.ExtendedCopy.Simple: BUG: desreferencia del puntero NULL del kernel, direcci\u00f3n: 00000000000001a8 RIP: 0010:target_complete_cmd+0x9d/0x130 [target_core_mod] Seguimiento de llamadas: fd_execute_rw+0x148/0x42a [target_core_file] __dynamic_pr_debug+0xa7/0xe0? target_check_reservation+0x5b/0x940 [target_core_mod] __target_execute_cmd+0x1e/0x90 [target_core_mod] transport_generic_new_cmd+0x17c/0x330 [target_core_mod] target_xcopy_issue_pt_cmd+0x9/0x60 [target_core_mod] target_xcopy_read_source.isra.7 +0x10b/0x1b0 [target_core_mod] ? target_check_fua+0x40/0x40 [target_core_mod]? transport_complete_task_attr+0x130/0x130 [target_core_mod] target_xcopy_do_work+0x61f/0xc00 [target_core_mod] Esta soluci\u00f3n hace que la cola target_complete_cmd() funcione en se_cmd-\u0026gt;cpuid si se_tpg_wwn es NULL.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/target/target_core_transport.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"39ae3edda325e9cf9e978c9788affe88231f3b34\",\"lessThan\":\"e7732c5a19a15a62b0b23fd683a639b0483e1f40\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"39ae3edda325e9cf9e978c9788affe88231f3b34\",\"lessThan\":\"a47fa41381a09e5997afd762664db4f5f6657e03\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/target/target_core_transport.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.13\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.13\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.13.6\",\"lessThanOrEqual\":\"5.13.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.14\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2024-09-10T15:39:25.848722Z\",\"id\":\"CVE-2021-47290\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.13\",\"versionEndExcluding\":\"5.13.6\",\"matchCriteriaId\":\"00CAF7AA-B763-4138-B0F1-E2450358E207\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.14:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"71268287-21A8-4488-AA4F-23C473153131\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.14:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"23B9E5C6-FAB5-4A02-9E39-27C8787B0991\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/a47fa41381a09e5997afd762664db4f5f6657e03\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/e7732c5a19a15a62b0b23fd683a639b0483e1f40\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/a47fa41381a09e5997afd762664db4f5f6657e03\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/e7732c5a19a15a62b0b23fd683a639b0483e1f40\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2025-11-21T14:11:53+00:00",
      "cve": "CVE-2021-47290",
      "id": "CVE-2021-47290",
      "initial_release_date": "2021-01-01T00:00:00+00:00",
      "product_status:known_affected": "90",
      "product_status:known_not_affected": "108",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: scsi: target: Fix NULL dereference on XCOPY completion",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-47290.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/e7732c5a19a15a62b0b23fd683a639b0483e1f40\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/a47fa41381a09e5997afd762664db4f5f6657e03\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T05:32:07.995Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-47290\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T15:39:25.848722Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:14.881Z\"}}], \"cna\": {\"title\": \"scsi: target: Fix NULL dereference on XCOPY completion\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"39ae3edda325e9cf9e978c9788affe88231f3b34\", \"lessThan\": \"e7732c5a19a15a62b0b23fd683a639b0483e1f40\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"39ae3edda325e9cf9e978c9788affe88231f3b34\", \"lessThan\": \"a47fa41381a09e5997afd762664db4f5f6657e03\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/target/target_core_transport.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.13\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.13\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.13.6\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.13.*\"}, {\"status\": \"unaffected\", \"version\": \"5.14\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/target/target_core_transport.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/e7732c5a19a15a62b0b23fd683a639b0483e1f40\"}, {\"url\": \"https://git.kernel.org/stable/c/a47fa41381a09e5997afd762664db4f5f6657e03\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nscsi: target: Fix NULL dereference on XCOPY completion\\n\\nCPU affinity control added with commit 39ae3edda325 (\\\"scsi: target: core:\\nMake completion affinity configurable\\\") makes target_complete_cmd() queue\\nwork on a CPU based on se_tpg-\u003ese_tpg_wwn-\u003ecmd_compl_affinity state.\\n\\nLIO\u0027s EXTENDED COPY worker is a special case in that read/write cmds are\\ndispatched using the global xcopy_pt_tpg, which carries a NULL se_tpg_wwn\\npointer following initialization in target_xcopy_setup_pt().\\n\\nThe NULL xcopy_pt_tpg-\u003ese_tpg_wwn pointer is dereferenced on completion of\\nany EXTENDED COPY initiated read/write cmds. E.g using the libiscsi\\nSCSI.ExtendedCopy.Simple test:\\n\\n  BUG: kernel NULL pointer dereference, address: 00000000000001a8\\n  RIP: 0010:target_complete_cmd+0x9d/0x130 [target_core_mod]\\n  Call Trace:\\n   fd_execute_rw+0x148/0x42a [target_core_file]\\n   ? __dynamic_pr_debug+0xa7/0xe0\\n   ? target_check_reservation+0x5b/0x940 [target_core_mod]\\n   __target_execute_cmd+0x1e/0x90 [target_core_mod]\\n   transport_generic_new_cmd+0x17c/0x330 [target_core_mod]\\n   target_xcopy_issue_pt_cmd+0x9/0x60 [target_core_mod]\\n   target_xcopy_read_source.isra.7+0x10b/0x1b0 [target_core_mod]\\n   ? target_check_fua+0x40/0x40 [target_core_mod]\\n   ? transport_complete_task_attr+0x130/0x130 [target_core_mod]\\n   target_xcopy_do_work+0x61f/0xc00 [target_core_mod]\\n\\nThis fix makes target_complete_cmd() queue work on se_cmd-\u003ecpuid if\\nse_tpg_wwn is NULL.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.13.6\", \"versionStartIncluding\": \"5.13\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.14\", \"versionStartIncluding\": \"5.13\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T13:51:37.777Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47290\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T13:51:37.777Z\", \"dateReserved\": \"2024-05-21T13:27:52.129Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-21T14:35:15.411Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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.