ksmbd: unset the binding mark of a reused connection

{
  "id": "8a35f68327717931fd286eb53275713944668f3b16c121e7567dd3b1ba28fb34",
  "url": "https://osv.dev/vulnerability/CVE-2024-46795",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ksmbd: unset the binding mark of a reused connection",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: ksmbd: unset the binding mark of a reused connection Steve French reported null pointer dereference error from sha256 lib. cifs.ko can send session setup requests on reused connection. If reused connection is used for binding session, conn->binding can still remain true and generate_preauth_hash() will not set sess->Preauth_HashValue and it will be NULL. It is used as a material to create an encryption key in ksmbd_gen_smb311_encryptionkey. ->Preauth_HashValue cause null pointer dereference error from crypto_shash_update(). BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: 0000 [#1] PREEMPT SMP PTI CPU: 8 PID: 429254 Comm: kworker/8:39 Hardware name: LENOVO 20MAS08500/20MAS08500, BIOS N2CET69W (1.52 ) Workqueue: ksmbd-io handle_ksmbd_work [ksmbd] RIP: 0010:lib_sha256_base_do_update.isra.0+0x11e/0x1d0 [sha256_ssse3] ? show_regs+0x6d/0x80 ? __die+0x24/0x80 ? page_fault_oops+0x99/0x1b0 ? do_user_addr_fault+0x2ee/0x6b0 ? exc_page_fault+0x83/0x1b0 ? asm_exc_page_fault+0x27/0x30 ? __pfx_sha256_transform_rorx+0x10/0x10 [sha256_ssse3] ? lib_sha256_base_do_update.isra.0+0x11e/0x1d0 [sha256_ssse3] ? __pfx_sha256_transform_rorx+0x10/0x10 [sha256_ssse3] ? __pfx_sha256_transform_rorx+0x10/0x10 [sha256_ssse3] _sha256_update+0x77/0xa0 [sha256_ssse3] sha256_avx2_update+0x15/0x30 [sha256_ssse3] crypto_shash_up",
    "evidence": "osv:CVE-2024-46795",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.15.167",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.110",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.51",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.10.10",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2024-46795",
      "aliases": [
        "CVE-2024-46795"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "f5a544e3bab78142207e0242d22442db85ba1eff"
                },
                {
                  "fixed": "9914f1bd61d5e838bb1ab15a71076d37a6db65d1"
                },
                {
                  "fixed": "93d54a4b59c4b3d803d20aa645ab5ca71f3b3b02"
                },
                {
                  "fixed": "41bc256da7e47b679df87c7fc7a5b393052b9cce"
                },
                {
                  "fixed": "4c8496f44f5bb5c06cdef5eb130ab259643392a1"
                },
                {
                  "fixed": "78c5a6f1f630172b19af4912e755e1da93ef0ab5"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-46795.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.15.0"
                },
                {
                  "fixed": "5.15.167"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "6.1.110"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.51"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.10.10"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-46795.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:35.855446250Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/41bc256da7e47b679df87c7fc7a5b393052b9cce",
        "https://git.kernel.org/stable/c/4c8496f44f5bb5c06cdef5eb130ab259643392a1",
        "https://git.kernel.org/stable/c/78c5a6f1f630172b19af4912e755e1da93ef0ab5",
        "https://git.kernel.org/stable/c/93d54a4b59c4b3d803d20aa645ab5ca71f3b3b02",
        "https://git.kernel.org/stable/c/9914f1bd61d5e838bb1ab15a71076d37a6db65d1",
        "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/46xxx/CVE-2024-46795.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-46795",
        "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/2024/46xxx/CVE-2024-46795.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-46795",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 503151,
  "published_at": "2024-09-18T07:12:50.259+00:00"
}