Vulnerability-Lookup

FKIE_CVE-2021-47077

Vulnerability from fkie_nvd - Published: 2024-03-01 22:15 - Updated: 2026-06-17 04:16

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: scsi: qedf: Add pointer checks in qedf_update_link_speed() The following trace was observed: [ 14.042059] Call Trace: [ 14.042061] <IRQ> [ 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] irq_exit+0xf7/0x100 [ 14.042255] do_IRQ+0x7f/0xd0 [ 14.042257] common_interrupt+0xf/0xf [ 14.042259] </IRQ> API qedf_link_update() is getting called from QED but by that time shost_data is not initialised. This results in a NULL pointer dereference when we try to dereference shost_data while updating supported_speeds. Add a NULL pointer check before dereferencing shost_data.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/11014efcec378bb0050a6cf08eaf375e3693400a	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/73578af92a0fae6609b955fcc9113e50e413c80f	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a6362a737572f66051deb7637f3f77ddf7a4402f	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/11014efcec378bb0050a6cf08eaf375e3693400a	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/73578af92a0fae6609b955fcc9113e50e413c80f	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/a6362a737572f66051deb7637f3f77ddf7a4402f	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	5.13
linux	linux_kernel	5.13

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/scsi/qedf/qedf_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a6362a737572f66051deb7637f3f77ddf7a4402f",
              "status": "affected",
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              "versionType": "git"
            },
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            },
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/scsi/qedf/qedf_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.11"
            },
            {
              "lessThan": "4.11",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.12.*",
              "status": "unaffected",
              "version": "5.12.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.13",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
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      "nodes": [
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          "cpeMatch": [
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              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "2AAEF84B-9EDC-4A9E-9CED-005FB1D87316",
              "versionEndExcluding": "5.10.40",
              "versionStartIncluding": "4.11",
              "vulnerable": true
            },
            {
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              "matchCriteriaId": "E8F2CE30-38B0-4716-B12B-A139B0F9C5C9",
              "versionEndExcluding": "5.12.7",
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              "vulnerable": true
            },
            {
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        }
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  ],
  "cveTags": [],
  "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."
    }
  ],
  "id": "CVE-2021-47077",
  "lastModified": "2026-06-17T04:16:24.450",
  "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"
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        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
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    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
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          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
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            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-09-10T15:56:57.690041Z",
          "version": "2.0.3"
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  "published": "2024-03-01T22:15:47.283",
  "references": [
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      "tags": [
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-476"
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      "source": "nvd@nist.gov",
      "type": "Primary"
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  ]
}

CVE-2021-47077 (GCVE-0-2021-47077)

Vulnerability from cvelistv5 – Published: 2024-03-01 21:15 – Updated: 2026-05-11 13:47

Title

scsi: qedf: Add pointer checks in qedf_update_link_speed()

Summary

Severity

No CVSS data available.

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-09-10 15:56 UTC

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/a6362a737572f6605…
https://git.kernel.org/stable/c/11014efcec378bb00…
https://git.kernel.org/stable/c/73578af92a0fae660…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 61d8658b4a435eac729966cc94cdda077a8df5cd , < a6362a737572f66051deb7637f3f77ddf7a4402f (git) Affected: 61d8658b4a435eac729966cc94cdda077a8df5cd , < 11014efcec378bb0050a6cf08eaf375e3693400a (git) Affected: 61d8658b4a435eac729966cc94cdda077a8df5cd , < 73578af92a0fae6609b955fcc9113e50e413c80f (git)
Linux	Linux	Affected: 4.11 Unaffected: 0 , < 4.11 (semver) Unaffected: 5.10.40 , ≤ 5.10.* (semver) Unaffected: 5.12.7 , ≤ 5.12.* (semver) Unaffected: 5.13 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T05:24:39.828Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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            "url": "https://git.kernel.org/stable/c/11014efcec378bb0050a6cf08eaf375e3693400a"
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            ],
            "url": "https://git.kernel.org/stable/c/73578af92a0fae6609b955fcc9113e50e413c80f"
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        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-47077",
                "options": [
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                  }
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                "role": "CISA Coordinator",
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        "title": "CISA ADP Vulnrichment"
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    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
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          "programFiles": [
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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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      "providerMetadata": {
        "dateUpdated": "2026-05-11T13:47:38.142Z",
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        },
        {
          "url": "https://git.kernel.org/stable/c/73578af92a0fae6609b955fcc9113e50e413c80f"
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      "title": "scsi: qedf: Add pointer checks in qedf_update_link_speed()",
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  "cveMetadata": {
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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": "2026-05-11T13:47:38.142Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.