{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-46795",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-46795"
  ],
  "published": "2024-09-18T07:17:19Z",
  "summary": "ksmbd: unset the binding mark of a reused connection",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: unset the binding mark of a reused connection\n\nSteve French reported null pointer dereference error from sha256 lib.\ncifs.ko can send session setup requests on reused connection.\nIf reused connection is used for binding session, conn->binding can\nstill remain true and generate_preauth_hash() will not set\nsess->Preauth_HashValue and it will be NULL.\nIt is used as a material to create an encryption key in\nksmbd_gen_smb311_encryptionkey. ->Preauth_HashValue cause null pointer\ndereference error from crypto_shash_update().\n\nBUG: kernel NULL pointer dereference, address: 0000000000000000\n#PF: supervisor read access in kernel mode\n#PF: error_code(0x0000) - not-present page\nPGD 0 P4D 0\nOops: 0000 [#1] PREEMPT SMP PTI\nCPU: 8 PID: 429254 Comm: kworker/8:39\nHardware name: LENOVO 20MAS08500/20MAS08500, BIOS N2CET69W (1.52 )\nWorkqueue: ksmbd-io handle_ksmbd_work [ksmbd]\nRIP: 0010:lib_sha256_base_do_update.isra.0+0x11e/0x1d0 [sha256_ssse3]\n<TASK>\n? show_regs+0x6d/0x80\n? __die+0x24/0x80\n? page_fault_oops+0x99/0x1b0\n? do_user_addr_fault+0x2ee/0x6b0\n? exc_page_fault+0x83/0x1b0\n? asm_exc_page_fault+0x27/0x30\n? __pfx_sha256_transform_rorx+0x10/0x10 [sha256_ssse3]\n? lib_sha256_base_do_update.isra.0+0x11e/0x1d0 [sha256_ssse3]\n? __pfx_sha256_transform_rorx+0x10/0x10 [sha256_ssse3]\n? __pfx_sha256_transform_rorx+0x10/0x10 [sha256_ssse3]\n_sha256_update+0x77/0xa0 [sha256_ssse3]\nsha256_avx2_update+0x15/0x30 [sha256_ssse3]\ncrypto_shash_update+0x1e/0x40\nhmac_update+0x12/0x20\ncrypto_shash_update+0x1e/0x40\ngenerate_key+0x234/0x380 [ksmbd]\ngenerate_smb3encryptionkey+0x40/0x1c0 [ksmbd]\nksmbd_gen_smb311_encryptionkey+0x72/0xa0 [ksmbd]\nntlm_authenticate.isra.0+0x423/0x5d0 [ksmbd]\nsmb2_sess_setup+0x952/0xaa0 [ksmbd]\n__process_request+0xa3/0x1d0 [ksmbd]\n__handle_ksmbd_work+0x1c4/0x2f0 [ksmbd]\nhandle_ksmbd_work+0x2d/0xa0 [ksmbd]\nprocess_one_work+0x16c/0x350\nworker_thread+0x306/0x440\n? __pfx_worker_thread+0x10/0x10\nkthread+0xef/0x120\n? __pfx_kthread+0x10/0x10\nret_from_fork+0x44/0x70\n? __pfx_kthread+0x10/0x10\nret_from_fork_asm+0x1b/0x30\n</TASK>",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
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        "1:6.1.47-1+rpt4",
        "1:6.1.54-1+rpt2",
        "1:6.1.58-1+rpt2",
        "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",
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      ],
      "ecosystem_specific": {
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            "binary_version": "1:6.1.47-1+rpt2"
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            "binary_version": "1:6.1.47-1+rpt2"
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            "assessment": "commit ancestry (strak rule)",
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          },
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            "linux_commit": null,
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            "assessment": "upstream version (no usable Linux commit)",
            "upstream_fixed": "6.1.110"
          },
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            "linux_commit": null,
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            "assessment": "upstream version (no usable Linux commit)",
            "upstream_fixed": "6.1.110"
          },
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            "assessment": "commit ancestry (strak rule)",
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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-2024-46795"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/9914f1bd61d5e838bb1ab15a71076d37a6db65d1"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/93d54a4b59c4b3d803d20aa645ab5ca71f3b3b02"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/41bc256da7e47b679df87c7fc7a5b393052b9cce"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/4c8496f44f5bb5c06cdef5eb130ab259643392a1"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/78c5a6f1f630172b19af4912e755e1da93ef0ab5"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
  }
}