nvmet: fix NULL pointer dereference in nvmet_execute_identify_nslist()

{
  "id": "b7171a61434b14a0b76fe67e921adf1a6a88b7894f1487a3d01b60749f1a8fd3",
  "url": "https://osv.dev/vulnerability/CVE-2026-80813",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "nvmet: fix NULL pointer dereference in nvmet_execute_identify_nslist()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: nvmet: fix NULL pointer dereference in nvmet_execute_identify_nslist() When a host issues an Identify command with CNS 07h (Active Namespace ID List for a specific I/O Command Set), nvmet_execute_identify_nslist() is called with match_css set. The command-set filter dereferences req->ns, but this handler never calls nvmet_req_find_ns(), so req->ns is always NULL (nvmet_req_init() resets it to NULL). As soon as an enabled namespace with an NSID greater than the requested value exists, req->ns->csi dereferences a NULL pointer and oopses. Besides the crash, the comparison is logically wrong: to filter the list by command set it must test the command set of the namespace being iterated, not a single fixed value. Use the loop variable ns->csi.",
    "evidence": "osv:CVE-2026-80813",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.18.47",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.1.11",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.2.1",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-80813",
      "aliases": [
        "CVE-2026-80813"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "61c9967cd63448292a64f9ee9aeb6e2053e3a624"
                },
                {
                  "fixed": "61dc1a37e04d4003a19095f54883358330034a39"
                },
                {
                  "fixed": "2bc1e33ff6a558c8ceef7c0077f3ef70a15fcba2"
                },
                {
                  "fixed": "123d664ac98d6f3464462ad4a530474b91ba9890"
                },
                {
                  "fixed": "79aba4c9403419d822972d2851f2a96a2c0531cf"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80813.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.47"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.1.11"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "7.2.0"
                },
                {
                  "fixed": "7.2.1"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80813.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:37.832921444Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/123d664ac98d6f3464462ad4a530474b91ba9890",
        "https://git.kernel.org/stable/c/2bc1e33ff6a558c8ceef7c0077f3ef70a15fcba2",
        "https://git.kernel.org/stable/c/61dc1a37e04d4003a19095f54883358330034a39",
        "https://git.kernel.org/stable/c/79aba4c9403419d822972d2851f2a96a2c0531cf",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80813.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-80813",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80813.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-80813",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 505360,
  "published_at": "2026-09-04T15:13:33.761+00:00"
}