smb: client: fix OOBs when building SMB2_IOCTL request

{
  "id": "4cbb48421d33956187d426a5ae757b36d3210cfe9e52b1eb4f14b28193a5c351",
  "url": "https://osv.dev/vulnerability/CVE-2024-50151",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "smb: client: fix OOBs when building SMB2_IOCTL request",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: smb: client: fix OOBs when building SMB2_IOCTL request When using encryption, either enforced by the server or when using 'seal' mount option, the client will squash all compound request buffers down for encryption into a single iov in smb2_set_next_command(). SMB2_ioctl_init() allocates a small buffer (448 bytes) to hold the SMB2_IOCTL request in the first iov, and if the user passes an input buffer that is greater than 328 bytes, smb2_set_next_command() will end up writing off the end of @rqst->iov[0].iov_base as shown below: mount.cifs //srv/share /mnt -o ...,seal ln -s $(perl -e \"print('a')for 1..1024\") /mnt/link BUG: KASAN: slab-out-of-bounds in smb2_set_next_command.cold+0x1d6/0x24c [cifs] Write of size 4116 at addr ffff8881148fcab8 by task ln/859 CPU: 1 UID: 0 PID: 859 Comm: ln Not tainted 6.12.0-rc3 #1 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-2.fc40 04/01/2014 Call Trace: dump_stack_lvl+0x5d/0x80 ? smb2_set_next_command.cold+0x1d6/0x24c [cifs] print_report+0x156/0x4d9 ? smb2_set_next_command.cold+0x1d6/0x24c [cifs] ? __virt_addr_valid+0x145/0x310 ? __phys_addr+0x46/0x90 ? smb2_set_next_command.cold+0x1d6/0x24c [cifs] kasan_report+0xda/0x110 ? smb2_set_next_command.cold+0x1d6/0x24c [cifs] kasan_check_range+0x10f/0x1f0 __asan_memcpy+0x3c/0x60 smb2_set_next_command.cold+0x1d6/0x24c [cifs] smb2_compound_op+0x238c/0x3840 [cifs] ? kasan_save_track+0x14/0x30 ? kasan_save_free_info+0x3b",
    "evidence": "osv:CVE-2024-50151",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.4.285",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.10.229",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.170",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.115",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.59",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.11.6",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2024-50151",
      "aliases": [
        "CVE-2024-50151"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                  "introduced": "e77fe73c7e38c36145825d84cfe385d400aba4fd"
                },
                {
                  "fixed": "6f0516ef1290da24b85461ed08a0938af7415e49"
                },
                {
                  "fixed": "ed31aba8ce93472d9e16f5cff844ae7c94e9601d"
                },
                {
                  "fixed": "e07d05b7f5ad9a503d9cab0afde2ab867bb65470"
                },
                {
                  "fixed": "2ef632bfb888d1a14f81c1703817951e0bec5531"
                },
                {
                  "fixed": "b209c3a0bc3ac172265c7fa8309e5d00654f2510"
                },
                {
                  "fixed": "fe92ddc1c32d4474e605e3a31a4afcd0e7d765ec"
                },
                {
                  "fixed": "1ab60323c5201bef25f2a3dc0ccc404d9aca77f1"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-50151.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.0.0"
                },
                {
                  "fixed": "5.4.285"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.5.0"
                },
                {
                  "fixed": "5.10.229"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.11.0"
                },
                {
                  "fixed": "5.15.170"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
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                  "introduced": "5.16.0"
                },
                {
                  "fixed": "6.1.115"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.59"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.11.6"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-50151.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:23.360756169Z",
      "provider": "osv",
      "references": [
        "https://cert-portal.siemens.com/productcert/html/ssa-265688.html",
        "https://git.kernel.org/stable/c/1ab60323c5201bef25f2a3dc0ccc404d9aca77f1",
        "https://git.kernel.org/stable/c/2ef632bfb888d1a14f81c1703817951e0bec5531",
        "https://git.kernel.org/stable/c/6f0516ef1290da24b85461ed08a0938af7415e49",
        "https://git.kernel.org/stable/c/b209c3a0bc3ac172265c7fa8309e5d00654f2510",
        "https://git.kernel.org/stable/c/e07d05b7f5ad9a503d9cab0afde2ab867bb65470",
        "https://git.kernel.org/stable/c/ed31aba8ce93472d9e16f5cff844ae7c94e9601d",
        "https://git.kernel.org/stable/c/fe92ddc1c32d4474e605e3a31a4afcd0e7d765ec",
        "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html",
        "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/50xxx/CVE-2024-50151.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-50151",
        "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/2024/50xxx/CVE-2024-50151.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-50151",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 489392,
  "published_at": "2024-11-07T09:31:27.672+00:00"
}