CVE-2024-46795 (GCVE-0-2024-46795)
Vulnerability from cvelistv5
Published
2024-09-18 07:12
Modified
2025-05-04 09:34
Severity ?
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] <TASK> ? 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_update+0x1e/0x40 hmac_update+0x12/0x20 crypto_shash_update+0x1e/0x40 generate_key+0x234/0x380 [ksmbd] generate_smb3encryptionkey+0x40/0x1c0 [ksmbd] ksmbd_gen_smb311_encryptionkey+0x72/0xa0 [ksmbd] ntlm_authenticate.isra.0+0x423/0x5d0 [ksmbd] smb2_sess_setup+0x952/0xaa0 [ksmbd] __process_request+0xa3/0x1d0 [ksmbd] __handle_ksmbd_work+0x1c4/0x2f0 [ksmbd] handle_ksmbd_work+0x2d/0xa0 [ksmbd] process_one_work+0x16c/0x350 worker_thread+0x306/0x440 ? __pfx_worker_thread+0x10/0x10 kthread+0xef/0x120 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x44/0x70 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1b/0x30 </TASK>
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/41bc256da7e47b679df87c7fc7a5b393052b9ccePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4c8496f44f5bb5c06cdef5eb130ab259643392a1Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/78c5a6f1f630172b19af4912e755e1da93ef0ab5Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/93d54a4b59c4b3d803d20aa645ab5ca71f3b3b02Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9914f1bd61d5e838bb1ab15a71076d37a6db65d1Patch
Impacted products
Vendor Product Version
Linux Linux Version: f5a544e3bab78142207e0242d22442db85ba1eff
Version: f5a544e3bab78142207e0242d22442db85ba1eff
Version: f5a544e3bab78142207e0242d22442db85ba1eff
Version: f5a544e3bab78142207e0242d22442db85ba1eff
Version: f5a544e3bab78142207e0242d22442db85ba1eff
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   Linux Linux Version: 5.15
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                "id": "CVE-2024-46795",
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                "role": "CISA Coordinator",
                "timestamp": "2024-09-29T14:22:54.579301Z",
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          "lang": "en",
          "value": "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-\u003ebinding can\nstill remain true and generate_preauth_hash() will not set\nsess-\u003ePreauth_HashValue and it will be NULL.\nIt is used as a material to create an encryption key in\nksmbd_gen_smb311_encryptionkey. -\u003ePreauth_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\u003cTASK\u003e\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\u003c/TASK\u003e"
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        "dateUpdated": "2025-05-04T09:34:30.333Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/9914f1bd61d5e838bb1ab15a71076d37a6db65d1"
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          "url": "https://git.kernel.org/stable/c/78c5a6f1f630172b19af4912e755e1da93ef0ab5"
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      "title": "ksmbd: unset the binding mark of a reused connection",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2024-46795",
    "datePublished": "2024-09-18T07:12:50.259Z",
    "dateReserved": "2024-09-11T15:12:18.279Z",
    "dateUpdated": "2025-05-04T09:34:30.333Z",
    "state": "PUBLISHED"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-46795\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-09-18T08:15:06.280\",\"lastModified\":\"2024-09-20T18:21:04.067\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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-\u003ebinding can\\nstill remain true and generate_preauth_hash() will not set\\nsess-\u003ePreauth_HashValue and it will be NULL.\\nIt is used as a material to create an encryption key in\\nksmbd_gen_smb311_encryptionkey. -\u003ePreauth_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\u003cTASK\u003e\\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\u003c/TASK\u003e\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ksmbd: anular la marca de enlace de una conexi\u00f3n reutilizada Steve French inform\u00f3 de un error de desreferencia de puntero nulo de la librer\u00eda sha256. cifs.ko puede enviar solicitudes de configuraci\u00f3n de sesi\u00f3n en una conexi\u00f3n reutilizada. Si se utiliza una conexi\u00f3n reutilizada para vincular la sesi\u00f3n, conn-\u0026gt;binding puede seguir siendo verdadero y generate_preauth_hash() no establecer\u00e1 sess-\u0026gt;Preauth_HashValue y ser\u00e1 NULL. Se utiliza como material para crear una clave de cifrado en ksmbd_gen_smb311_encryptionkey. -\u0026gt;Preauth_HashValue provoca un error de desreferencia de puntero nulo de crypto_shash_update(). ERROR: desreferencia de puntero NULL del kernel, direcci\u00f3n: 0000000000000000 #PF: acceso de lectura del supervisor en modo kernel #PF: error_code(0x0000) - p\u00e1gina no presente PGD 0 P4D 0 Oops: 0000 [#1] PREEMPT SMP PTI CPU: 8 PID: 429254 Comm: kworker/8:39 Nombre del hardware: LENOVO 20MAS08500/20MAS08500, BIOS N2CET69W (1.52 ) Cola de trabajo: 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 ? error_p\u00e1gina_oops+0x99/0x1b0 ? error_direcci\u00f3n_usuario+0x2ee/0x6b0 ? error_p\u00e1gina_exc+0x83/0x1b0 ? error_p\u00e1gina_exc+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_update+0x1e/0x40 hmac_update+0x12/0x20 crypto_shash_update+0x1e/0x40 generar_clave+0x234/0x380 [ksmbd] generar_clave_de_cifrado_smb3+0x40/0x1c0 [ksmbd] ksmbd_gen_smb311_clave_de_cifrado+0x72/0xa0 [ksmbd] __pfx_kthread+0x10/0x10 ret_from_fork+0x44/0x70 ? __pfx_kthread+0x10/0x10 ret_de_fork_asm+0x1b/0x30 \"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.15\",\"versionEndExcluding\":\"5.15.167\",\"matchCriteriaId\":\"EA943118-D4CB-4C23-A051-06993A503CC8\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.110\",\"matchCriteriaId\":\"6B1A95FC-7E7E-428B-BB59-F76640C652AE\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.51\",\"matchCriteriaId\":\"E4529134-BAC4-4776-840B-304009E181A0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.10.10\",\"matchCriteriaId\":\"ACDEE48C-137A-4731-90D0-A675865E1BED\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"8B3CE743-2126-47A3-8B7C-822B502CF119\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"4DEB27E7-30AA-45CC-8934-B89263EF3551\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"E0005AEF-856E-47EB-BFE4-90C46899394D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"39889A68-6D34-47A6-82FC-CD0BF23D6754\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"B8383ABF-1457-401F-9B61-EE50F4C61F4F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"B77A9280-37E6-49AD-B559-5B23A3B1DC3D\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/41bc256da7e47b679df87c7fc7a5b393052b9cce\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/4c8496f44f5bb5c06cdef5eb130ab259643392a1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/78c5a6f1f630172b19af4912e755e1da93ef0ab5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/93d54a4b59c4b3d803d20aa645ab5ca71f3b3b02\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9914f1bd61d5e838bb1ab15a71076d37a6db65d1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-46795\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-29T14:22:54.579301Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-29T14:22:56.121Z\"}}], \"cna\": {\"title\": \"ksmbd: unset the binding mark of a reused connection\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"f5a544e3bab7\", \"lessThan\": \"9914f1bd61d5\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"f5a544e3bab7\", \"lessThan\": \"93d54a4b59c4\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"f5a544e3bab7\", \"lessThan\": \"41bc256da7e4\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"f5a544e3bab7\", \"lessThan\": \"4c8496f44f5b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"f5a544e3bab7\", \"lessThan\": \"78c5a6f1f630\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/smb/server/smb2pdu.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.15\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.15\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.15.167\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.110\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.51\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.10.10\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.10.*\"}, {\"status\": \"unaffected\", \"version\": \"6.11\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/smb/server/smb2pdu.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/9914f1bd61d5e838bb1ab15a71076d37a6db65d1\"}, {\"url\": \"https://git.kernel.org/stable/c/93d54a4b59c4b3d803d20aa645ab5ca71f3b3b02\"}, {\"url\": \"https://git.kernel.org/stable/c/41bc256da7e47b679df87c7fc7a5b393052b9cce\"}, {\"url\": \"https://git.kernel.org/stable/c/4c8496f44f5bb5c06cdef5eb130ab259643392a1\"}, {\"url\": \"https://git.kernel.org/stable/c/78c5a6f1f630172b19af4912e755e1da93ef0ab5\"}], \"x_generator\": {\"engine\": \"bippy-9e1c9544281a\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"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-\u003ebinding can\\nstill remain true and generate_preauth_hash() will not set\\nsess-\u003ePreauth_HashValue and it will be NULL.\\nIt is used as a material to create an encryption key in\\nksmbd_gen_smb311_encryptionkey. -\u003ePreauth_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\u003cTASK\u003e\\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\u003c/TASK\u003e\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-11-05T09:46:46.923Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-46795\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-11-05T09:46:46.923Z\", \"dateReserved\": \"2024-09-11T15:12:18.279Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-09-18T07:12:50.259Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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