{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-50151",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-50151"
  ],
  "published": "2024-11-07T09:34:57Z",
  "summary": "smb: client: fix OOBs when building SMB2_IOCTL request",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix OOBs when building SMB2_IOCTL request\n\nWhen using encryption, either enforced by the server or when using\n'seal' mount option, the client will squash all compound request buffers\ndown for encryption into a single iov in smb2_set_next_command().\n\nSMB2_ioctl_init() allocates a small buffer (448 bytes) to hold the\nSMB2_IOCTL request in the first iov, and if the user passes an input\nbuffer that is greater than 328 bytes, smb2_set_next_command() will\nend up writing off the end of @rqst->iov[0].iov_base as shown below:\n\n  mount.cifs //srv/share /mnt -o ...,seal\n  ln -s $(perl -e \"print('a')for 1..1024\") /mnt/link\n\n  BUG: KASAN: slab-out-of-bounds in\n  smb2_set_next_command.cold+0x1d6/0x24c [cifs]\n  Write of size 4116 at addr ffff8881148fcab8 by task ln/859\n\n  CPU: 1 UID: 0 PID: 859 Comm: ln Not tainted 6.12.0-rc3 #1\n  Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS\n  1.16.3-2.fc40 04/01/2014\n  Call Trace:\n   <TASK>\n   dump_stack_lvl+0x5d/0x80\n   ? smb2_set_next_command.cold+0x1d6/0x24c [cifs]\n   print_report+0x156/0x4d9\n   ? smb2_set_next_command.cold+0x1d6/0x24c [cifs]\n   ? __virt_addr_valid+0x145/0x310\n   ? __phys_addr+0x46/0x90\n   ? smb2_set_next_command.cold+0x1d6/0x24c [cifs]\n   kasan_report+0xda/0x110\n   ? smb2_set_next_command.cold+0x1d6/0x24c [cifs]\n   kasan_check_range+0x10f/0x1f0\n   __asan_memcpy+0x3c/0x60\n   smb2_set_next_command.cold+0x1d6/0x24c [cifs]\n   smb2_compound_op+0x238c/0x3840 [cifs]\n   ? kasan_save_track+0x14/0x30\n   ? kasan_save_free_info+0x3b/0x70\n   ? vfs_symlink+0x1a1/0x2c0\n   ? do_symlinkat+0x108/0x1c0\n   ? __pfx_smb2_compound_op+0x10/0x10 [cifs]\n   ? kmem_cache_free+0x118/0x3e0\n   ? cifs_get_writable_path+0xeb/0x1a0 [cifs]\n   smb2_get_reparse_inode+0x423/0x540 [cifs]\n   ? __pfx_smb2_get_reparse_inode+0x10/0x10 [cifs]\n   ? rcu_is_watching+0x20/0x50\n   ? __kmalloc_noprof+0x37c/0x480\n   ? smb2_create_reparse_symlink+0x257/0x490 [cifs]\n   ? smb2_create_reparse_symlink+0x38f/0x490 [cifs]\n   smb2_create_reparse_symlink+0x38f/0x490 [cifs]\n   ? __pfx_smb2_create_reparse_symlink+0x10/0x10 [cifs]\n   ? find_held_lock+0x8a/0xa0\n   ? hlock_class+0x32/0xb0\n   ? __build_path_from_dentry_optional_prefix+0x19d/0x2e0 [cifs]\n   cifs_symlink+0x24f/0x960 [cifs]\n   ? __pfx_make_vfsuid+0x10/0x10\n   ? __pfx_cifs_symlink+0x10/0x10 [cifs]\n   ? make_vfsgid+0x6b/0xc0\n   ? generic_permission+0x96/0x2d0\n   vfs_symlink+0x1a1/0x2c0\n   do_symlinkat+0x108/0x1c0\n   ? __pfx_do_symlinkat+0x10/0x10\n   ? strncpy_from_user+0xaa/0x160\n   __x64_sys_symlinkat+0xb9/0xf0\n   do_syscall_64+0xbb/0x1d0\n   entry_SYSCALL_64_after_hwframe+0x77/0x7f\n  RIP: 0033:0x7f08d75c13bb",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
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        "1:6.1.47-1+rpt4",
        "1:6.1.54-1+rpt2",
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        "1:6.1.63-1+rpt1",
        "1:6.1.73-1+rpt1",
        "1:6.6.20-1+rpt1",
        "1:6.6.28-1+rpt1",
        "1:6.6.31-1+rpt1",
        "1:6.6.47-1+rpt1",
        "1:6.6.51-1+rpt1",
        "1:6.6.51-1+rpt2",
        "1:6.6.51-1+rpt3"
      ],
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        ]
      },
      "database_specific": {
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            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
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            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
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            "compiled_filter": false
          },
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          },
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            "assessment": "upstream version (no usable Linux commit)",
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            "assessment": "commit ancestry (strak rule)",
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          "1:6.6.51-1+rpt2": {
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            "assessment": "commit ancestry (strak rule)",
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          },
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            "assessment": "commit ancestry (strak rule)",
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          }
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    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-50151"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/6f0516ef1290da24b85461ed08a0938af7415e49"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ed31aba8ce93472d9e16f5cff844ae7c94e9601d"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e07d05b7f5ad9a503d9cab0afde2ab867bb65470"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2ef632bfb888d1a14f81c1703817951e0bec5531"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b209c3a0bc3ac172265c7fa8309e5d00654f2510"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/fe92ddc1c32d4474e605e3a31a4afcd0e7d765ec"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1ab60323c5201bef25f2a3dc0ccc404d9aca77f1"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T11:52:36Z"
  }
}