nvme: fix memory allocation in nvme_pr_read_keys()

{
  "id": "64063d8e402e3597977f8ae017551ea9a23c4cb1bd4f4835546b943ac5a16e0f",
  "url": "https://osv.dev/vulnerability/CVE-2026-23244",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "nvme: fix memory allocation in nvme_pr_read_keys()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: nvme: fix memory allocation in nvme_pr_read_keys() nvme_pr_read_keys() takes num_keys from userspace and uses it to calculate the allocation size for rse via struct_size(). The upper limit is PR_KEYS_MAX (64K). A malicious or buggy userspace can pass a large num_keys value that results in a 4MB allocation attempt at most, causing a warning in the page allocator when the order exceeds MAX_PAGE_ORDER. To fix this, use kvzalloc() instead of kzalloc(). This bug has the same reasoning and fix with the patch below: https://lore.kernel.org/linux-block/20251212013510.3576091-1-kartikey406@gmail.com/ Warning log: WARNING: mm/page_alloc.c:5216 at __alloc_frozen_pages_noprof+0x5aa/0x2300 mm/page_alloc.c:5216, CPU#1: syz-executor117/272 Modules linked in: CPU: 1 UID: 0 PID: 272 Comm: syz-executor117 Not tainted 6.19.0 #1 PREEMPT(voluntary) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 RIP: 0010:__alloc_frozen_pages_noprof+0x5aa/0x2300 mm/page_alloc.c:5216 Code: ff 83 bd a8 fe ff ff 0a 0f 86 69 fb ff ff 0f b6 1d f9 f9 c4 04 80 fb 01 0f 87 3b 76 30 ff 83 e3 01 75 09 c6 05 e4 f9 c4 04 01 <0f> 0b 48 c7 85 70 fe ff ff 00 00 00 00 e9 8f fd ff ff 31 c0 e9 0d RSP: 0018:ffffc90000fcf450 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 1ffff920001f9ea0 RDX: 0000000000000000 RSI: 000000000000000b RDI: 0000000000040dc0 RBP: ffffc90000fcf648 R08: f",
    "evidence": "osv:CVE-2026-23244",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.6.130",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.77",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.17",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.19.7",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-23244",
      "aliases": [
        "CVE-2026-23244"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "5fd96a4e15de8442915a912233d800c56f49001d"
                },
                {
                  "fixed": "e42ff5abbd14927553b624c0e06d24df76156fe6"
                },
                {
                  "fixed": "15fb6d627484ee39ed73e202ef4720e1fa5c898e"
                },
                {
                  "fixed": "5a501379a010690ae9ae88bef62a1bae1aca32e6"
                },
                {
                  "fixed": "baef52d80093bd686e70b3cb7e0512a40ae76705"
                },
                {
                  "fixed": "c3320153769f05fd7fe9d840cb555dd3080ae424"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23244.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.5.0"
                },
                {
                  "fixed": "6.6.130"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.77"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.17"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "6.19.7"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23244.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:29.704746722Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/15fb6d627484ee39ed73e202ef4720e1fa5c898e",
        "https://git.kernel.org/stable/c/5a501379a010690ae9ae88bef62a1bae1aca32e6",
        "https://git.kernel.org/stable/c/baef52d80093bd686e70b3cb7e0512a40ae76705",
        "https://git.kernel.org/stable/c/c3320153769f05fd7fe9d840cb555dd3080ae424",
        "https://git.kernel.org/stable/c/e42ff5abbd14927553b624c0e06d24df76156fe6",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23244.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-23244",
        "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/2026/23xxx/CVE-2026-23244.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-23244",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 496502,
  "published_at": "2026-03-18T10:05:06.534+00:00"
}