CVE-2024-46736

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This is remote-peer data driving kernel memory management on the client.\nAC:L - The server simply answers a compounded CREATE+SET_INFO(rename) with STATUS_INVALID_PARAMETER \u2014 deterministic, no race to win, no memory-layout guessing, and leases are enabled by default. The same condition even arises reliably against benign servers for hardlinked files, which is precisely the case the introducing commit describes.\nPR:N - The attacker is the remote SMB endpoint and needs no account, credentials, or privileges on the victim client; the client initiates and authenticates the connection itself and then processes the poisoned status code during a routine rename of an open file.\nUI:N - No human action is required \u2014 renames of files held open on an SMB mount are ordinary automated activity (backup/sync daemons, log rotation, package and build tooling), so the attacker-controlled server merely waits for one and replies with STATUS_INVALID_PARAMETER.\nS:U - The corruption is confined to the client kernel's own heap and security authority; no VM, hypervisor, or IOMMU boundary is crossed.\nC:H - The premature free leaves file->private_data dangling and smb2_compound_op() kstrdup()s cfile->symlink_target out of freed memory into data returned to userspace, and a reclaimed cifsFileInfo yields a general arbitrary kernel-heap read primitive.\nI:H - The freed cifsFileInfo contains three list_heads whose later list_del gives an arbitrary write, plus four work_struct/delayed_work members with func pointers that can be queued after slab reclaim for control-flow hijack, making this a full write/code-execution primitive.\nA:H - The refcount underflow frees the handle while the fd remains open, so the next read/write or close on that fd hits freed memory, causing list corruption, a double free, and a kernel oops/panic."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/client/smb2inode.c"], "versions": [{"version": "1e60bc0e954389af82f1d9a85f13a63f6572350f", "lessThan": "b27ea9c96efd2c252a981fb00d0f001b86c90f3e", "status": "affected", "versionType": "git"}, {"version": "71f15c90e785d1de4bcd65a279e7256684c25c0d", "lessThan": "1a46c7f6546b73cbf36f5a618a1a6bbb45391eb3", "status": "affected", "versionType": "git"}, {"version": "71f15c90e785d1de4bcd65a279e7256684c25c0d", "lessThan": "3523a3df03c6f04f7ea9c2e7050102657e331a4f", "status": "affected", "versionType": "git"}, {"version": "6.6.32", "lessThan": "6.6.51", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/client/smb2inode.c"], "versions": [{"version": "6.9", "status": "affected"}, {"version": "0", "lessThan": "6.9", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.51", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.10.10", "lessThanOrEqual": "6.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.11", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.32", "versionEndExcluding": "6.6.51"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "6.10.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "6.11"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/b27ea9c96efd2c252a981fb00d0f001b86c90f3e"}, {"url": "https://git.kernel.org/stable/c/1a46c7f6546b73cbf36f5a618a1a6bbb45391eb3"}, {"url": "https://git.kernel.org/stable/c/3523a3df03c6f04f7ea9c2e7050102657e331a4f"}], "title": "smb: client: fix double put of @cfile in smb2_rename_path()", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2024-09-29T14:52:47.842995Z", "id": "CVE-2024-46736", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-29T14:53:02.091Z"}}]}}

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vulnerability has been resolved:\n\nsmb: client: fix double put of @cfile in smb2_rename_path()\n\nIf smb2_set_path_attr() is called with a valid @cfile and returned\n-EINVAL, we need to call cifs_get_writable_path() again as the\nreference of @cfile was already dropped by previous smb2_compound_op()\ncall."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: smb: cliente: se corrige la doble colocaci\u00f3n de @cfile en smb2_rename_path() Si se llama a smb2_set_path_attr() con un @cfile v\u00e1lido y se devuelve -EINVAL, debemos llamar a cifs_get_writable_path() nuevamente ya que la referencia de @cfile ya fue descartada por la llamada anterior a smb2_compound_op()."}], "id": "CVE-2024-46736", "lastModified": "2026-08-04T11:20:19.473", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-46736", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": 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{"bugzilla": {"description": "kernel: smb: client: fix double put of @cfile in smb2_rename_path()", "id": "2313084", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2313084"}, "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-404", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nsmb: client: fix double put of @cfile in smb2_rename_path()\nIf smb2_set_path_attr() is called with a valid @cfile and returned\n-EINVAL, we need to call cifs_get_writable_path() again as the\nreference of @cfile was already dropped by previous smb2_compound_op()\ncall."], "name": "CVE-2024-46736", "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Will not fix", "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-2024-46736\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-46736\nhttps://lore.kernel.org/linux-cve-announce/2024091833-CVE-2024-46736-a70d@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-07-12T22:44:59.887398+00:00", "updated": "2025-07-12T22:44:59.887471+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}