{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2023-52572 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2023-52572 is a high-severity use after free vulnerability in Debian Debian Linux, published on 2 Mar 2024. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2023-52572 and fix it if it is affected.\n\nWhat it is: CVE-2023-52572 is a high-severity use after free vulnerability in Debian Debian Linux, published on 2 Mar 2024. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2023-52572 in the wild and no public exploit code.\n\nAffected product: Debian Debian Linux. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2023-52572/ (Markdown: https://insights.sbomify.com/CVE-2023-52572/index.md)","id":"CVE-2023-52572","markdown":"https://insights.sbomify.com/CVE-2023-52572/index.md","name":"CVE-2023-52572","record":{"aliases":["AZL-54137","BELL-CVE-2023-52572","CLSA-2025-1755707175","CLSA-2025-1755707619","DEBIAN-CVE-2023-52572","GHSA-rj62-x3fp-f44h","ROOT-OS-UBUNTU-2204-CVE-2023-52572","UBUNTU-CVE-2023-52572"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["code_execution","denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel CIFS","requires_auth":"low_privilege","summary":"A use-after-free vulnerability in the Linux kernel CIFS module allows attackers to cause a denial of service or potentially execute code.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"debian_linux","vendor":"debian"},{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":7.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-416","name":"Use After Free"}],"description":"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   \u003cTASK\u003e\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   \u003c/TASK\u003e\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-\u003eresp_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-\u003emid_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.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"cifs: Fix UAF in cifs_demultiplex_thread()","id":"CVE-2023-52572","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"debian:debian_linux","products":["debian:debian_linux","linux:linux_kernel"],"type":"use_after_free","year":"2023"},"n_packages":0,"n_references":6,"next":{"headline":"net: rds: Fix possible NULL-pointer dereference","id":"CVE-2023-52573"},"packages":[],"prev":{"headline":"power: supply: rk817: Fix node refcount leak","id":"CVE-2023-52571"},"products":["Linux"],"published":"2024-03-02","related":[{"cvss_score":10,"headline":"ProFTPD Improper Access Control","id":"CVE-2015-3306","kev_date_added":"2026-10-08","published":"2015-05-18"},{"cvss_score":9.9,"headline":"RoundCube Webmail Deserialization of Untrusted Data","id":"CVE-2025-49113","kev_date_added":"2026-02-20","published":"2025-06-02"},{"cvss_score":9.8,"headline":"GNU InetUtils Argument Injection","id":"CVE-2026-24061","kev_date_added":"2026-01-26","published":"2026-01-21"},{"cvss_score":9.8,"headline":"Linux Kernel Improper Check for Unusual or Exceptional Conditions","id":"CVE-2025-39682","kev_date_added":"2026-09-18","published":"2025-09-05"},{"cvss_score":9.8,"headline":"Mozilla Firefox Use-After-Free","id":"CVE-2024-9680","kev_date_added":"2024-10-15","published":"2024-10-09"},{"cvss_score":9.8,"headline":"RARLAB UnRAR Directory Traversal","id":"CVE-2022-30333","kev_date_added":"2022-08-09","published":"2022-05-09"},{"cvss_score":9.8,"headline":"Roundcube Webmail SQL Injection","id":"CVE-2021-44026","kev_date_added":"2023-06-22","published":"2021-11-19"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-08-05","vendors":["Linux"]},"summary":"A use-after-free vulnerability in the Linux kernel CIFS module allows attackers to cause a denial of service or potentially execute code.","url":"https://insights.sbomify.com/CVE-2023-52572/"}