{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "1ac5a404797523cedaf424a3aaa3cf8f9548dff8"
            },
            {
              "fixed": "53c97e9882f4e747b4ac31b211317c2eba541af9"
            },
            {
              "fixed": "9896bdfd21d918e9f26a52bc6109cc77970ee0b1"
            },
            {
              "fixed": "9128c2411b83a64c0a69d2ff059c741bde25a9cc"
            },
            {
              "fixed": "c19b360fa10c521c0b681875cdaa51545d45a491"
            },
            {
              "fixed": "a3ed2daab02b2a706e882ad31b5c3c4f33cb5bb1"
            },
            {
              "fixed": "e2b143df29003d2704b51f62e9297006953dbacb"
            },
            {
              "fixed": "c75f8ce4baa29ae57fe615c6a2c5101f59b8b89a"
            },
            {
              "fixed": "f6b079629becfa977f9c51fe53ad2e6dcc55ef44"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.11.0"
            },
            {
              "fixed": "5.10.260"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.211"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.177"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.144"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.95"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.37"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.14"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74584.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/bnxt_re: zero shared page before exposing to userspace\n\nbnxt_re_alloc_ucontext() allocates uctx-\u003eshpg via\n__get_free_page(GFP_KERNEL). The buddy allocator does not zero pages\nwithout __GFP_ZERO, so the page contains stale kernel data from\nwhatever object most recently freed it.\n\nThe page is then mapped into userspace via vm_insert_page() under\nBNXT_RE_MMAP_SH_PAGE in bnxt_re_mmap(). The driver only ever writes\n4 bytes (a u32 AVID) at offset BNXT_RE_AVID_OFFT (0x10) inside\nbnxt_re_create_ah(); the remaining 4092 bytes of the page are exposed\nto userspace unsanitised, leaking kernel memory contents.\n\nAny user with access to /dev/infiniband/uverbsX on a host with a\nbnxt_re device (typically rdma group membership) can read this data\nvia a single mmap() at pgoff 0 after IB_USER_VERBS_CMD_GET_CONTEXT.\n\nOther shared pages in the same file already use get_zeroed_page()\ncorrectly:\n\n  drivers/infiniband/hw/bnxt_re/ib_verbs.c\n      srq-\u003euctx_srq_page = (void *)get_zeroed_page(GFP_KERNEL);\n      cq-\u003euctx_cq_page  = (void *)get_zeroed_page(GFP_KERNEL);\n\nuctx-\u003eshpg is the only outlier. Bring it in line with the existing\nconvention by switching to get_zeroed_page().",
  "id": "CVE-2026-74584",
  "modified": "2026-08-27T11:30:26.275214519Z",
  "published": "2026-08-22T14:28:07.988Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/53c97e9882f4e747b4ac31b211317c2eba541af9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9128c2411b83a64c0a69d2ff059c741bde25a9cc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9896bdfd21d918e9f26a52bc6109cc77970ee0b1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a3ed2daab02b2a706e882ad31b5c3c4f33cb5bb1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c19b360fa10c521c0b681875cdaa51545d45a491"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c75f8ce4baa29ae57fe615c6a2c5101f59b8b89a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e2b143df29003d2704b51f62e9297006953dbacb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f6b079629becfa977f9c51fe53ad2e6dcc55ef44"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74584.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74584"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "RDMA/bnxt_re: zero shared page before exposing to userspace"
}