{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-46736", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-09-11T15:12:18.257Z", "datePublished": "2024-09-18T07:11:58.499Z", "dateUpdated": "2026-08-05T11:38:12.776Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:38:12.776Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following 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." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL" }, "scenarios": [ { "lang": "en", "value": "AV:N - The vulnerable retry path in smb2_rename_path() is entered only when compound_send_recv() maps the server's STATUS_INVALID_PARAMETER response to -EINVAL, so a malicious/compromised SMB server or a network MITM (the Linux cifs client does not mandate signing/encryption) fully controls whether the double put occurs. 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 — 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 — 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" } } ] } }