{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2024-46795", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-09-11T15:12:18.279Z", "datePublished": "2024-09-18T07:12:50.259Z", "dateUpdated": "2026-05-11T20:36:41.419Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T20:36:41.419Z"}, "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->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? 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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "EA943118-D4CB-4C23-A051-06993A503CC8", "versionEndExcluding": "5.15.167", "versionStartIncluding": "5.15", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "6B1A95FC-7E7E-428B-BB59-F76640C652AE", "versionEndExcluding": "6.1.110", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "E4529134-BAC4-4776-840B-304009E181A0", "versionEndExcluding": "6.6.51", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "ACDEE48C-137A-4731-90D0-A675865E1BED", "versionEndExcluding": "6.10.10", "versionStartIncluding": "6.7", "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", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "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->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>"}, {"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-&gt;binding puede seguir siendo verdadero y generate_preauth_hash() no establecer\u00e1 sess-&gt;Preauth_HashValue y ser\u00e1 NULL. Se utiliza como material para crear una clave de cifrado en ksmbd_gen_smb311_encryptionkey. -&gt;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 "}], "id": "CVE-2024-46795", "lastModified": "2025-11-03T23:16:02.223", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2024-09-18T08:15:06.280", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "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": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: ksmbd: unset the binding mark of a reused connection", "id": "2313143", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2313143"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nksmbd: unset the binding mark of a reused connection\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().\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>"], "name": "CVE-2024-46795", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-09-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-46795\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-46795\nhttps://lore.kernel.org/linux-cve-announce/2024091855-CVE-2024-46795-9908@gregkh/T"], "threat_severity": "Low"}

{}