Vulnerability-Lookup

FKIE_CVE-2021-46963

Vulnerability from fkie_nvd - Published: 2024-02-27 19:04 - Updated: 2026-08-04 10:16

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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: qla2xxx: Fix crash in qla2xxx_mqueuecommand() RIP: 0010:kmem_cache_free+0xfa/0x1b0 Call Trace: qla2xxx_mqueuecommand+0x2b5/0x2c0 [qla2xxx] scsi_queue_rq+0x5e2/0xa40 __blk_mq_try_issue_directly+0x128/0x1d0 blk_mq_request_issue_directly+0x4e/0xb0 Fix incorrect call to free srb in qla2xxx_mqueuecommand(), as srb is now allocated by upper layers. This fixes smatch warning of srb unintended free.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6641df81ab799f28a5d564f860233dd26cca0d93	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/702cdaa2c6283c135ef16d52e0e4e3c1005aa538	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/77509a238547863040a42d57c72403f7d4c89a8f	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/80ef24175df2cba3860d0369d1c662b49ee2de56	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a73208e3244127ef9f2cdf24e4adb947aaa32053	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c5ab9b67d8b061de74e2ca51bf787ee599bd7f89	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/6641df81ab799f28a5d564f860233dd26cca0d93	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/702cdaa2c6283c135ef16d52e0e4e3c1005aa538	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/77509a238547863040a42d57c72403f7d4c89a8f	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/80ef24175df2cba3860d0369d1c662b49ee2de56	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/a73208e3244127ef9f2cdf24e4adb947aaa32053	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/c5ab9b67d8b061de74e2ca51bf787ee599bd7f89	Patch

Impacted products

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

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/scsi/qla2xxx/qla_os.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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              "versionType": "git"
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              "status": "unaffected",
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        }
      ],
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  "configurations": [
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Fix crash in qla2xxx_mqueuecommand()\n\n    RIP: 0010:kmem_cache_free+0xfa/0x1b0\n    Call Trace:\n       qla2xxx_mqueuecommand+0x2b5/0x2c0 [qla2xxx]\n       scsi_queue_rq+0x5e2/0xa40\n       __blk_mq_try_issue_directly+0x128/0x1d0\n       blk_mq_request_issue_directly+0x4e/0xb0\n\nFix incorrect call to free srb in qla2xxx_mqueuecommand(), as srb is now\nallocated by upper layers. This fixes smatch warning of srb unintended\nfree."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: scsi: qla2xxx: Soluciona falla en qla2xxx_mqueuecommand() RIP: 0010:kmem_cache_free+0xfa/0x1b0 Rastreo de llamadas: qla2xxx_mqueuecommand+0x2b5/0x2c0 [qla2xxx] scsi_queue_rq+0x5e2/0xa40 __blk_mq_try_issue_ directamente+0x128 /0x1d0 blk_mq_request_issue_directly+0x4e/0xb0 Se corrigi\u00f3 la llamada incorrecta para liberar srb en qla2xxx_mqueuecommand(), ya que srb ahora est\u00e1 asignado por capas superiores. Esto corrige la advertencia de srb gratuito no deseado."
    }
  ],
  "id": "CVE-2021-46963",
  "lastModified": "2026-08-04T10:16:38.593",
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        "cvssData": {
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          "confidentialityImpact": "HIGH",
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          "scope": "UNCHANGED",
          "userInteraction": "NONE",
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          "confidentialityImpact": "NONE",
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}

CVE-2021-46963 (GCVE-0-2021-46963)

Vulnerability from cvelistv5 – Published: 2024-02-27 18:47 – Updated: 2026-08-05 08:45

Title

scsi: qla2xxx: Fix crash in qla2xxx_mqueuecommand()

Summary

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-02-27 20:13 UTC

Assigner

Linux mitre root

References

6 references

URL	Tags
https://git.kernel.org/stable/c/c5ab9b67d8b061de7…
https://git.kernel.org/stable/c/77509a23854786304…
https://git.kernel.org/stable/c/702cdaa2c6283c135…
https://git.kernel.org/stable/c/80ef24175df2cba38…
https://git.kernel.org/stable/c/a73208e3244127ef9…
https://git.kernel.org/stable/c/6641df81ab799f28a…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 64a8c5018a4b21b04a756a56c495ef47c14e92d9 , < c5ab9b67d8b061de74e2ca51bf787ee599bd7f89 (git) Affected: dea6ee7173039d489977c9ed92e3749154615db4 , < 77509a238547863040a42d57c72403f7d4c89a8f (git) Affected: af2a0c51b1205327f55a7e82e530403ae1d42cbb , < 702cdaa2c6283c135ef16d52e0e4e3c1005aa538 (git) Affected: af2a0c51b1205327f55a7e82e530403ae1d42cbb , < 80ef24175df2cba3860d0369d1c662b49ee2de56 (git) Affected: af2a0c51b1205327f55a7e82e530403ae1d42cbb , < a73208e3244127ef9f2cdf24e4adb947aaa32053 (git) Affected: af2a0c51b1205327f55a7e82e530403ae1d42cbb , < 6641df81ab799f28a5d564f860233dd26cca0d93 (git) Affected: 4a1cc2f71bc57cf8dee6f58e7d2355a43aabb312 (git) Affected: 4.19.90 , < 4.19.191 (semver) Affected: 5.4.4 , < 5.4.118 (semver) Affected: 5.3.17 , < 5.4 (semver)
Linux	Linux	Affected: 5.5 Unaffected: 0 , < 5.5 (semver) Unaffected: 4.19.191 , ≤ 4.19.* (semver) Unaffected: 5.4.118 , ≤ 5.4.* (semver) Unaffected: 5.10.36 , ≤ 5.10.* (semver) Unaffected: 5.11.20 , ≤ 5.11.* (semver) Unaffected: 5.12.3 , ≤ 5.12.* (semver) Unaffected: 5.13 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-46963",
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                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-02-27T20:13:28.391773Z",
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
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        "title": "CVE Program Container"
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    ],
    "cna": {
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          "product": "Linux",
          "programFiles": [
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              "lessThan": "80ef24175df2cba3860d0369d1c662b49ee2de56",
              "status": "affected",
              "version": "af2a0c51b1205327f55a7e82e530403ae1d42cbb",
              "versionType": "git"
            },
            {
              "lessThan": "a73208e3244127ef9f2cdf24e4adb947aaa32053",
              "status": "affected",
              "version": "af2a0c51b1205327f55a7e82e530403ae1d42cbb",
              "versionType": "git"
            },
            {
              "lessThan": "6641df81ab799f28a5d564f860233dd26cca0d93",
              "status": "affected",
              "version": "af2a0c51b1205327f55a7e82e530403ae1d42cbb",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "4a1cc2f71bc57cf8dee6f58e7d2355a43aabb312",
              "versionType": "git"
            },
            {
              "lessThan": "4.19.191",
              "status": "affected",
              "version": "4.19.90",
              "versionType": "semver"
            },
            {
              "lessThan": "5.4.118",
              "status": "affected",
              "version": "5.4.4",
              "versionType": "semver"
            },
            {
              "lessThan": "5.4",
              "status": "affected",
              "version": "5.3.17",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/scsi/qla2xxx/qla_os.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.5"
            },
            {
              "lessThan": "5.5",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.191",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.118",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.36",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.11.*",
              "status": "unaffected",
              "version": "5.11.20",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.12.*",
              "status": "unaffected",
              "version": "5.12.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.13",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.191",
                  "versionStartIncluding": "4.19.90",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.118",
                  "versionStartIncluding": "5.4.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.36",
                  "versionStartIncluding": "5.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.11.20",
                  "versionStartIncluding": "5.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.12.3",
                  "versionStartIncluding": "5.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.13",
                  "versionStartIncluding": "5.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "5.3.17",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Fix crash in qla2xxx_mqueuecommand()\n\n    RIP: 0010:kmem_cache_free+0xfa/0x1b0\n    Call Trace:\n       qla2xxx_mqueuecommand+0x2b5/0x2c0 [qla2xxx]\n       scsi_queue_rq+0x5e2/0xa40\n       __blk_mq_try_issue_directly+0x128/0x1d0\n       blk_mq_request_issue_directly+0x4e/0xb0\n\nFix incorrect call to free srb in qla2xxx_mqueuecommand(), as srb is now\nallocated by upper layers. This fixes smatch warning of srb unintended\nfree."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable path is qla2xxx_queuecommand \u2192 qla2xxx_mqueuecommand on outbound initiator I/O through the SCSI/block stack, reachable by local reads/writes to qla2xxx-backed devices or filesystems, not by processing remote Fibre Channel or network packets.\nAC:L - Once a qpair is offline (PCI EEH/FLR/reset recovery, a normal operational state on QLogic FC HBAs) or DIF I/O hits an unsupported qpair, any subsequent SCSI command deterministically takes the QLA_INTERFACE_ERROR path and performs the incorrect free with no race or layout dependency.\nPR:L - Any unprivileged local user who can issue I/O to a mounted filesystem or block device backed by a qla2xxx HBA reaches queuecommand; no capabilities or init-namespace root are required.\nUI:N - The attacker triggers the bug by performing their own I/O against already-attached qla2xxx storage; no separate victim mount, open, or confirmation is required.\nS:U - Impact is confined to the host kernel privilege domain (crash or heap corruption via the SRB mempool); there is no VM escape, IOMMU bypass, or other cross-authority boundary crossing.\nC:H - When the SRB mempool is below min_nr (common with outstanding async fabric SRBs), mempool_free stores the embedded scsi_cmd_priv pointer; after scsi_done recycles the command this becomes a use-after-free that enables arbitrary kernel memory disclosure via heap reuse.\nI:H - The same mempool-poisoning UAF returns a dangling/aliased srb_t to later qla2xxx_get_qpair_sp callers for fabric/IOCB work, yielding heap corruption and control-flow hijack primitives suitable for privilege escalation.\nA:H - The reported failure is a kernel crash in kmem_cache_free from qla2xxx_mqueuecommand when the full mempool path frees the non-slab embedded SRB, which is full host availability impact."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:45:15.980Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c5ab9b67d8b061de74e2ca51bf787ee599bd7f89"
        },
        {
          "url": "https://git.kernel.org/stable/c/77509a238547863040a42d57c72403f7d4c89a8f"
        },
        {
          "url": "https://git.kernel.org/stable/c/702cdaa2c6283c135ef16d52e0e4e3c1005aa538"
        },
        {
          "url": "https://git.kernel.org/stable/c/80ef24175df2cba3860d0369d1c662b49ee2de56"
        },
        {
          "url": "https://git.kernel.org/stable/c/a73208e3244127ef9f2cdf24e4adb947aaa32053"
        },
        {
          "url": "https://git.kernel.org/stable/c/6641df81ab799f28a5d564f860233dd26cca0d93"
        }
      ],
      "title": "scsi: qla2xxx: Fix crash in qla2xxx_mqueuecommand()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-46963",
    "datePublished": "2024-02-27T18:47:01.783Z",
    "dateReserved": "2024-02-27T18:42:55.942Z",
    "dateUpdated": "2026-08-05T08:45:15.980Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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.
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FKIE_CVE-2021-46963

CVE-2021-46963 (GCVE-0-2021-46963)

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