{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "0071b138d44af4296bf871e6624369ce697b4b15"
            },
            {
              "fixed": "ec3bb289cf19d526224117d5d450a5fd9cbd5ab2"
            },
            {
              "fixed": "cde8931a25392670dd59a0acfcab87a830ab66c5"
            },
            {
              "fixed": "6c8a9f7bc00301e533a5366384f3070a8e7f8430"
            },
            {
              "fixed": "727e1f569855df83579edbd73dcb4a0723543a12"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.12.0"
            },
            {
              "fixed": "6.12.104"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.45"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74712.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nvdpa/mlx5: Fix buffer length in create_direct_keys()\n\nWe have seen in our CI the following KASAN message:\nBUG: KASAN: slab-out-of-bounds in cmd_exec+0x550/0xca0 [mlx5_core]\nRead of size 272 at addr 0000000176795020 by task qemu-system-s39/82764\n[...]\n[\u003c000011388ab3a7a0\u003e] cmd_exec+0x550/0xca0 [mlx5_core]\n[\u003c000011388ab3b61c\u003e] mlx5_cmd_exec_cb+0x25c/0x4f0 [mlx5_core]\n[\u003c000011388b21e82e\u003e] mlx5_vdpa_exec_async_cmds+0x22e/0x5e0 [mlx5_vdpa]\n[\u003c000011388b21fd44\u003e] create_direct_keys+0x954/0xef0 [mlx5_vdpa]\n[...]\nThe buggy address is located 4128 bytes inside of\nallocated 4384-byte region [0000000176794000, 0000000176795120)\n\nSo in essence we read 16 bytes beyond 4384-byte allocation.\ncreate_direct_keys calculates the pointer and length for in and out\nbuffers.\nThe size calculation for in includes the entire structure\nsize (out + in + mtt[]) but the pointer passed to cmd_exec points only\nto the 'in' field, skipping the 'out' field.\n\nThis causes mlx5_copy_to_msg() to read beyond the allocated buffer\nby sizeof(out) bytes when copying command data.\n\nProperly calculate the input size to match the pointer and allocation size.",
  "id": "CVE-2026-74712",
  "modified": "2026-08-27T11:31:17.438847092Z",
  "published": "2026-08-22T15:33:08.392Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6c8a9f7bc00301e533a5366384f3070a8e7f8430"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/727e1f569855df83579edbd73dcb4a0723543a12"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cde8931a25392670dd59a0acfcab87a830ab66c5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ec3bb289cf19d526224117d5d450a5fd9cbd5ab2"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74712.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74712"
    },
    {
      "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:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "vdpa/mlx5: Fix buffer length in create_direct_keys()"
}