{ "document": { "aggregate_severity": { "text": "Important" }, "category": "csaf_security_advisory", "csaf_version": "2.0", "distribution": { "text": "TuxCare License Agreement", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.", "title": "Terms of Use" }, { "category": "details", "text": "cifs: Fix UAF in cifs_demultiplex_thread() {CVE-2023-52572}", "title": "Details" } ], "publisher": { "category": "vendor", "contact_details": "https://tuxcare.com/contact/", "name": "TuxCare", "namespace": "https://tuxcare.com/" }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://security.tuxcare.com/csaf/v2/els_os/oraclelinux6els/advisories/2025/clsa-2025_1755707619.json" }, { "category": "self", "summary": "https://cve.tuxcare.com/els/releases/CLSA-2025:1755707619", "url": "https://cve.tuxcare.com/els/releases/CLSA-2025:1755707619" } ], "tracking": { "current_release_date": "2025-08-20T16:34:31Z", "generator": { "date": "2025-08-20T16:34:31Z", "engine": { "name": "pyCSAF" } }, "id": "CLSA-2025:1755707619", "initial_release_date": "2025-08-20T16:34:31Z", "revision_history": [ { "date": "2025-08-20T16:34:31Z", "number": "1", "summary": "Initial version" } ], "status": "final", "version": "1" }, "title": "kernel: Fix of CVE-2023-52572" }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "Oracle Linux 6", "product": { "name": "Oracle Linux 6", "product_id": "Oracle-Linux-6", "product_identification_helper": { "cpe": "cpe:2.3:o:oracle:linux:6:*:*:*:*:*:*:*" } } } ], "category": "product_family", "name": "Oracle Linux" } ], "category": "vendor", "name": "Oracle Corporation" }, { "branches": [ { "branches": [ { "category": "product_version", "name": "python-perf-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64", "product": { "name": "python-perf-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64", "product_id": "python-perf-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64", "product_identification_helper": { "purl": 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"product_version", "name": "kernel-headers-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64", "product": { "name": "kernel-headers-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64", "product_id": "kernel-headers-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64", "product_identification_helper": { "purl": "pkg:rpm/cloudlinux/kernel-headers@2.6.32-754.35.8.el6.tuxcare.els24?arch=x86_64" } } } ], "category": "architecture", "name": "x86_64" }, { "branches": [ { "category": "product_version", "name": "kernel-abi-whitelists-0:2.6.32-754.35.8.el6.tuxcare.els24.noarch", "product": { "name": "kernel-abi-whitelists-0:2.6.32-754.35.8.el6.tuxcare.els24.noarch", "product_id": "kernel-abi-whitelists-0:2.6.32-754.35.8.el6.tuxcare.els24.noarch", "product_identification_helper": { "purl": "pkg:rpm/cloudlinux/kernel-abi-whitelists@2.6.32-754.35.8.el6.tuxcare.els24?arch=noarch" } } }, { "category": "product_version", "name": "kernel-doc-0:2.6.32-754.35.8.el6.tuxcare.els24.noarch", "product": { "name": 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"product_identification_helper": { "purl": "pkg:rpm/cloudlinux/kernel-debug-devel@2.6.32-754.35.8.el6.tuxcare.els24?arch=i686" } } } ], "category": "architecture", "name": "i686" } ], "category": "vendor", "name": "CloudLinux" } ], "relationships": [ { "category": "default_component_of", "full_product_name": { "name": "python-perf-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64 as a component of Oracle Linux 6", "product_id": "Oracle-Linux-6:python-perf-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64" }, "product_reference": "python-perf-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64", "relates_to_product_reference": "Oracle-Linux-6" }, { "category": "default_component_of", "full_product_name": { "name": "perf-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64 as a component of Oracle Linux 6", "product_id": "Oracle-Linux-6:perf-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64" }, "product_reference": "perf-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64", "relates_to_product_reference": "Oracle-Linux-6" }, { "category": "default_component_of", "full_product_name": { "name": "kernel-abi-whitelists-0:2.6.32-754.35.8.el6.tuxcare.els24.noarch as a component of Oracle Linux 6", "product_id": "Oracle-Linux-6:kernel-abi-whitelists-0:2.6.32-754.35.8.el6.tuxcare.els24.noarch" }, "product_reference": "kernel-abi-whitelists-0:2.6.32-754.35.8.el6.tuxcare.els24.noarch", "relates_to_product_reference": "Oracle-Linux-6" }, { "category": "default_component_of", "full_product_name": { "name": "kernel-debug-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64 as a component of Oracle Linux 6", "product_id": "Oracle-Linux-6:kernel-debug-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64" }, "product_reference": "kernel-debug-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64", "relates_to_product_reference": "Oracle-Linux-6" }, { "category": "default_component_of", "full_product_name": { "name": "kernel-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64 as a component of Oracle Linux 6", "product_id": "Oracle-Linux-6:kernel-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64" }, "product_reference": "kernel-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64", "relates_to_product_reference": "Oracle-Linux-6" }, { "category": "default_component_of", "full_product_name": { "name": "kernel-devel-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64 as a component of Oracle Linux 6", "product_id": "Oracle-Linux-6:kernel-devel-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64" }, "product_reference": "kernel-devel-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64", "relates_to_product_reference": "Oracle-Linux-6" }, { "category": "default_component_of", "full_product_name": { "name": "kernel-debug-devel-0:2.6.32-754.35.8.el6.tuxcare.els24.i686 as a component of Oracle Linux 6", "product_id": "Oracle-Linux-6:kernel-debug-devel-0:2.6.32-754.35.8.el6.tuxcare.els24.i686" }, "product_reference": "kernel-debug-devel-0:2.6.32-754.35.8.el6.tuxcare.els24.i686", "relates_to_product_reference": "Oracle-Linux-6" }, { "category": "default_component_of", "full_product_name": { "name": "kernel-debug-devel-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64 as a component of Oracle Linux 6", "product_id": "Oracle-Linux-6:kernel-debug-devel-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64" }, "product_reference": "kernel-debug-devel-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64", "relates_to_product_reference": "Oracle-Linux-6" }, { "category": "default_component_of", "full_product_name": { "name": "kernel-doc-0:2.6.32-754.35.8.el6.tuxcare.els24.noarch as a component of Oracle Linux 6", "product_id": "Oracle-Linux-6:kernel-doc-0:2.6.32-754.35.8.el6.tuxcare.els24.noarch" }, "product_reference": "kernel-doc-0:2.6.32-754.35.8.el6.tuxcare.els24.noarch", "relates_to_product_reference": "Oracle-Linux-6" }, { "category": "default_component_of", "full_product_name": { "name": "kernel-headers-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64 as a component of Oracle Linux 6", "product_id": "Oracle-Linux-6:kernel-headers-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64" }, "product_reference": "kernel-headers-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64", "relates_to_product_reference": "Oracle-Linux-6" }, { "category": "default_component_of", "full_product_name": { "name": "kernel-firmware-0:2.6.32-754.35.8.el6.tuxcare.els24.noarch as a component of Oracle Linux 6", "product_id": "Oracle-Linux-6:kernel-firmware-0:2.6.32-754.35.8.el6.tuxcare.els24.noarch" }, "product_reference": "kernel-firmware-0:2.6.32-754.35.8.el6.tuxcare.els24.noarch", "relates_to_product_reference": "Oracle-Linux-6" } ] }, "vulnerabilities": [ { "cve": "CVE-2023-52572", "cwe": { "id": "CWE-416", "name": "Use After Free" }, "notes": [ { "category": "description", "text": "In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: Fix UAF in cifs_demultiplex_thread()\n\nThere is a UAF when xfstests on cifs:\n\n BUG: KASAN: use-after-free in smb2_is_network_name_deleted+0x27/0x160\n Read of size 4 at addr ffff88810103fc08 by task cifsd/923\n\n CPU: 1 PID: 923 Comm: cifsd Not tainted 6.1.0-rc4+ #45\n ...\n Call Trace:\n \n dump_stack_lvl+0x34/0x44\n print_report+0x171/0x472\n kasan_report+0xad/0x130\n kasan_check_range+0x145/0x1a0\n smb2_is_network_name_deleted+0x27/0x160\n cifs_demultiplex_thread.cold+0x172/0x5a4\n kthread+0x165/0x1a0\n ret_from_fork+0x1f/0x30\n \n\n Allocated by task 923:\n kasan_save_stack+0x1e/0x40\n kasan_set_track+0x21/0x30\n __kasan_slab_alloc+0x54/0x60\n kmem_cache_alloc+0x147/0x320\n mempool_alloc+0xe1/0x260\n cifs_small_buf_get+0x24/0x60\n allocate_buffers+0xa1/0x1c0\n cifs_demultiplex_thread+0x199/0x10d0\n kthread+0x165/0x1a0\n ret_from_fork+0x1f/0x30\n\n Freed by task 921:\n kasan_save_stack+0x1e/0x40\n kasan_set_track+0x21/0x30\n kasan_save_free_info+0x2a/0x40\n ____kasan_slab_free+0x143/0x1b0\n kmem_cache_free+0xe3/0x4d0\n cifs_small_buf_release+0x29/0x90\n SMB2_negotiate+0x8b7/0x1c60\n smb2_negotiate+0x51/0x70\n cifs_negotiate_protocol+0xf0/0x160\n cifs_get_smb_ses+0x5fa/0x13c0\n mount_get_conns+0x7a/0x750\n cifs_mount+0x103/0xd00\n cifs_smb3_do_mount+0x1dd/0xcb0\n smb3_get_tree+0x1d5/0x300\n vfs_get_tree+0x41/0xf0\n path_mount+0x9b3/0xdd0\n __x64_sys_mount+0x190/0x1d0\n do_syscall_64+0x35/0x80\n entry_SYSCALL_64_after_hwframe+0x46/0xb0\n\nThe UAF is because:\n\n mount(pid: 921) | cifsd(pid: 923)\n-------------------------------|-------------------------------\n | cifs_demultiplex_thread\nSMB2_negotiate |\n cifs_send_recv |\n compound_send_recv |\n smb_send_rqst |\n wait_for_response |\n wait_event_state [1] |\n | standard_receive3\n | cifs_handle_standard\n | handle_mid\n | mid->resp_buf = buf; [2]\n | dequeue_mid [3]\n KILL the process [4] |\n resp_iov[i].iov_base = buf |\n free_rsp_buf [5] |\n | is_network_name_deleted [6]\n | callback\n\n1. After send request to server, wait the response until\n mid->mid_state != SUBMITTED;\n2. Receive response from server, and set it to mid;\n3. Set the mid state to RECEIVED;\n4. Kill the process, the mid state already RECEIVED, get 0;\n5. Handle and release the negotiate response;\n6. UAF.\n\nIt can be easily reproduce with add some delay in [3] - [6].\n\nOnly sync call has the problem since async call's callback is\nexecuted in cifsd process.\n\nAdd an extra state to mark the mid state to READY before wakeup the\nwaitter, then it can get the resp safely.", "title": "Vulnerability description" }, { "category": "general", "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" } ], "product_status": { "fixed": [ "Oracle-Linux-6:python-perf-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64", "Oracle-Linux-6:perf-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64", "Oracle-Linux-6:kernel-abi-whitelists-0:2.6.32-754.35.8.el6.tuxcare.els24.noarch", "Oracle-Linux-6:kernel-debug-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64", "Oracle-Linux-6:kernel-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64", "Oracle-Linux-6:kernel-devel-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64", "Oracle-Linux-6:kernel-debug-devel-0:2.6.32-754.35.8.el6.tuxcare.els24.i686", "Oracle-Linux-6:kernel-debug-devel-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64", "Oracle-Linux-6:kernel-doc-0:2.6.32-754.35.8.el6.tuxcare.els24.noarch", "Oracle-Linux-6:kernel-headers-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64", "Oracle-Linux-6:kernel-firmware-0:2.6.32-754.35.8.el6.tuxcare.els24.noarch" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2023-52572" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/76569e3819e0bb59fc19b1b8688b017e627c268a", "url": "https://git.kernel.org/stable/c/76569e3819e0bb59fc19b1b8688b017e627c268a" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/908b3b5e97d25e879de3d1f172a255665491c2c3", "url": "https://git.kernel.org/stable/c/908b3b5e97d25e879de3d1f172a255665491c2c3" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/99960d282fba6634fa758df4124cb73ef8a77d8a", "url": "https://git.kernel.org/stable/c/99960d282fba6634fa758df4124cb73ef8a77d8a" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/d527f51331cace562393a8038d870b3e9916686f", "url": "https://git.kernel.org/stable/c/d527f51331cace562393a8038d870b3e9916686f" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/ed3b36f351d97dacb62cd0f399e8cf79f73bd30a", "url": "https://git.kernel.org/stable/c/ed3b36f351d97dacb62cd0f399e8cf79f73bd30a" } ], "release_date": "2024-03-02T22:15:00", "scores": [ { "cvss_v3": { "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" }, "products": [ "Oracle-Linux-6:python-perf-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64", "Oracle-Linux-6:perf-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64", "Oracle-Linux-6:kernel-abi-whitelists-0:2.6.32-754.35.8.el6.tuxcare.els24.noarch", "Oracle-Linux-6:kernel-debug-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64", "Oracle-Linux-6:kernel-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64", "Oracle-Linux-6:kernel-devel-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64", "Oracle-Linux-6:kernel-debug-devel-0:2.6.32-754.35.8.el6.tuxcare.els24.i686", "Oracle-Linux-6:kernel-debug-devel-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64", "Oracle-Linux-6:kernel-doc-0:2.6.32-754.35.8.el6.tuxcare.els24.noarch", "Oracle-Linux-6:kernel-headers-0:2.6.32-754.35.8.el6.tuxcare.els24.x86_64", "Oracle-Linux-6:kernel-firmware-0:2.6.32-754.35.8.el6.tuxcare.els24.noarch" ] } ], "threats": [ { "category": "impact", "details": "High" } ] } ] }