CVE-2026-90228 (GCVE-0-2026-90228)
Vulnerability from cvelistv5
Published
2026-09-17 16:07
Modified
2026-10-19 09:00
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: nvmet: fix NULL pointer dereference in nvmet_execute_identify_ns_zns() When a host issues an Identify command with CNS 05h (I/O Command Set specific Identify Namespace) and CSI 02h (ZNS) targeting a file-backed namespace, nvmet_execute_identify_ns_zns() calls bdev_is_zoned() on req->ns->bdev. A file-backed namespace has no block device, so req->ns->bdev is NULL and bdev_is_zoned() dereferences it, oopsing. The I/O command set is selected by the host-supplied CSI field and the command is routed here whenever CONFIG_BLK_DEV_ZONED is enabled, independent of the namespace backing type, so any file-backed namespace is exposed. Reject the command with Invalid Field when the namespace is not backed by a block device.
References
Impacted products
Vendor Product Version
Linux Linux Version: aaf2e048af2704da5869f27b508b288f36d5c7b7
Version: aaf2e048af2704da5869f27b508b288f36d5c7b7
Version: aaf2e048af2704da5869f27b508b288f36d5c7b7
Version: aaf2e048af2704da5869f27b508b288f36d5c7b7
Version: aaf2e048af2704da5869f27b508b288f36d5c7b7
Version: aaf2e048af2704da5869f27b508b288f36d5c7b7
Version: aaf2e048af2704da5869f27b508b288f36d5c7b7
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/nvme/target/zns.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "1ce8faf90eb0bf5599b90db38500aefea9426485",
              "status": "affected",
              "version": "aaf2e048af2704da5869f27b508b288f36d5c7b7",
              "versionType": "git"
            },
            {
              "lessThan": "b873099944dae5702b4b6db6814d1f1e8d4cfb00",
              "status": "affected",
              "version": "aaf2e048af2704da5869f27b508b288f36d5c7b7",
              "versionType": "git"
            },
            {
              "lessThan": "ff28a93a895912010a7827a0e1445ebe8be53b4d",
              "status": "affected",
              "version": "aaf2e048af2704da5869f27b508b288f36d5c7b7",
              "versionType": "git"
            },
            {
              "lessThan": "cc29f7082b7ab5e0337f27d1fef16359f05fcffa",
              "status": "affected",
              "version": "aaf2e048af2704da5869f27b508b288f36d5c7b7",
              "versionType": "git"
            },
            {
              "lessThan": "1fb1236312ee1a600de6b3ca560f0b3fd5a50471",
              "status": "affected",
              "version": "aaf2e048af2704da5869f27b508b288f36d5c7b7",
              "versionType": "git"
            },
            {
              "lessThan": "0b4cf43f9ca7118590a338de900edbd6047cd89f",
              "status": "affected",
              "version": "aaf2e048af2704da5869f27b508b288f36d5c7b7",
              "versionType": "git"
            },
            {
              "lessThan": "f594863967d87b7fcbff6e724d51135fd701a13d",
              "status": "affected",
              "version": "aaf2e048af2704da5869f27b508b288f36d5c7b7",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/nvme/target/zns.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.14"
            },
            {
              "lessThan": "5.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.221",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.188",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.157",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.110",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.52",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.6",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet: fix NULL pointer dereference in nvmet_execute_identify_ns_zns()\n\nWhen a host issues an Identify command with CNS 05h (I/O Command Set\nspecific Identify Namespace) and CSI 02h (ZNS) targeting a file-backed\nnamespace, nvmet_execute_identify_ns_zns() calls bdev_is_zoned() on\nreq-\u003ens-\u003ebdev. A file-backed namespace has no block device, so\nreq-\u003ens-\u003ebdev is NULL and bdev_is_zoned() dereferences it, oopsing.\n\nThe I/O command set is selected by the host-supplied CSI field and the\ncommand is routed here whenever CONFIG_BLK_DEV_ZONED is enabled,\nindependent of the namespace backing type, so any file-backed namespace\nis exposed.\n\nReject the command with Invalid Field when the namespace is not backed\nby a block device."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - The host-controlled Identify capsule (opcode nvme_admin_identify) carries CNS 05h (NVME_ID_CNS_CS_NS) and CSI 02h (NVME_CSI_ZNS); nvmet-tcp receives that CapsuleCmd in nvmet_tcp_done_recv_pdu() after kernel_accept() and dispatches via nvmet_parse_admin_cmd()/nvmet_execute_identify() into nvmet_execute_identify_ns_zns().\nAC:L - The attacker sets identify.cns and identify.csi on Identify for any enabled file-backed NSID; nvmet_execute_identify() routes CSI=ZNS to nvmet_execute_identify_ns_zns() whenever CONFIG_BLK_DEV_ZONED is built in, then bdev_is_zoned(req-\u003ens-\u003ebdev) hits NULL with no race or layout dependency.\nPR:N - nvmet_check_ctrl_status() after Connect/CC.EN only enforces DH-HMAC-CHAP when a host_key exists; nvmet_check_auth_status() otherwise returns true, nvmet_host_allowed() treats host NQN as an asserted identifier, and allow_any_host subsystems accept any initiator with no Linux credentials.\nUI:N - The remote initiator itself sends Connect, Property Set of CC.EN, then the crafted Identify; no local user must mount a device, open a file, or otherwise interact.\nS:U - The oops occurs in the target kernel\u0027s nvmet-tcp worker while executing nvmet_execute_identify_ns_zns() and stays in that host\u0027s kernel authority; it is not a VM escape or IOMMU/sandbox boundary bypass.\nC:N - bdev_is_zoned() only loads bdev-\u003ebd_queue through the NULL ns-\u003ebdev of a file-backed namespace; nvmet_execute_identify_ns_zns() crashes before nvmet_copy_to_sgl() of the identify buffer, so no kernel data is returned.\nI:N - The fault is a NULL read in bdev_get_queue() via bdev_is_zoned(); no kernel object is overwritten and a pure NULL dereference does not yield a write or control-flow primitive.\nA:H - Calling bdev_is_zoned(req-\u003ens-\u003ebdev) with a NULL file-backed bdev in nvmet_execute_identify_ns_zns() oopses the kernel, crashing the NVMe target."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:00:04.748Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/1ce8faf90eb0bf5599b90db38500aefea9426485"
        },
        {
          "url": "https://git.kernel.org/stable/c/b873099944dae5702b4b6db6814d1f1e8d4cfb00"
        },
        {
          "url": "https://git.kernel.org/stable/c/ff28a93a895912010a7827a0e1445ebe8be53b4d"
        },
        {
          "url": "https://git.kernel.org/stable/c/cc29f7082b7ab5e0337f27d1fef16359f05fcffa"
        },
        {
          "url": "https://git.kernel.org/stable/c/1fb1236312ee1a600de6b3ca560f0b3fd5a50471"
        },
        {
          "url": "https://git.kernel.org/stable/c/0b4cf43f9ca7118590a338de900edbd6047cd89f"
        },
        {
          "url": "https://git.kernel.org/stable/c/f594863967d87b7fcbff6e724d51135fd701a13d"
        }
      ],
      "title": "nvmet: fix NULL pointer dereference in nvmet_execute_identify_ns_zns()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-90228",
    "datePublished": "2026-09-17T16:07:36.625Z",
    "dateReserved": "2026-09-11T19:38:34.794Z",
    "dateUpdated": "2026-10-19T09:00:04.748Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.