{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2023-53252 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2023-53252 is a high-severity use after free vulnerability in Linux kernel, published on 15 Sep 2025. 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-2023-53252 and fix it if it is affected.\n\nWhat it is: CVE-2023-53252 is a high-severity use after free vulnerability in Linux kernel, published on 15 Sep 2025. 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-2023-53252 in the wild and no public exploit code.\n\nAffected product: Linux kernel. 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-2023-53252/ (Markdown: https://insights.sbomify.com/CVE-2023-53252/index.md)","id":"CVE-2023-53252","markdown":"https://insights.sbomify.com/CVE-2023-53252/index.md","name":"CVE-2023-53252","record":{"aliases":["BELL-CVE-2023-53252","DEBIAN-CVE-2023-53252","GHSA-r8x4-762h-wj65","UBUNTU-CVE-2023-53252"],"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 Bluetooth","requires_auth":"low_privilege","summary":"A use-after-free vulnerability in the Linux kernel Bluetooth subsystem allows attackers to cause denial of service or potentially execute code via crafted Bluetooth operations.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"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\nBluetooth: use RCU for hci_conn_params and iterate safely in hci_sync\n\nhci_update_accept_list_sync iterates over hdev-\u003epend_le_conns and\nhdev-\u003epend_le_reports, and waits for controller events in the loop body,\nwithout holding hdev lock.\n\nMeanwhile, these lists and the items may be modified e.g. by\nle_scan_cleanup. This can invalidate the list cursor or any other item\nin the list, resulting to invalid behavior (eg use-after-free).\n\nUse RCU for the hci_conn_params action lists. Since the loop bodies in\nhci_sync block and we cannot use RCU or hdev-\u003elock for the whole loop,\ncopy list items first and then iterate on the copy. Only the flags field\nis written from elsewhere, so READ_ONCE/WRITE_ONCE should guarantee we\nread valid values.\n\nFree params everywhere with hci_conn_params_free so the cleanup is\nguaranteed to be done properly.\n\nThis fixes the following, which can be triggered e.g. by BlueZ new\nmgmt-tester case \"Add + Remove Device Nowait - Success\", or by changing\nhci_le_set_cig_params to always return false, and running iso-tester:\n\n==================================================================\nBUG: KASAN: slab-use-after-free in hci_update_passive_scan_sync (net/bluetooth/hci_sync.c:2536 net/bluetooth/hci_sync.c:2723 net/bluetooth/hci_sync.c:2841)\nRead of size 8 at addr ffff888001265018 by task kworker/u3:0/32\n\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-1.fc38 04/01/2014\nWorkqueue: hci0 hci_cmd_sync_work\nCall Trace:\n\u003cTASK\u003e\ndump_stack_lvl (./arch/x86/include/asm/irqflags.h:134 lib/dump_stack.c:107)\nprint_report (mm/kasan/report.c:320 mm/kasan/report.c:430)\n? __virt_addr_valid (./include/linux/mmzone.h:1915 ./include/linux/mmzone.h:2011 arch/x86/mm/physaddr.c:65)\n? hci_update_passive_scan_sync (net/bluetooth/hci_sync.c:2536 net/bluetooth/hci_sync.c:2723 net/bluetooth/hci_sync.c:2841)\nkasan_report (mm/kasan/report.c:538)\n? hci_update_passive_scan_sync (net/bluetooth/hci_sync.c:2536 net/bluetooth/hci_sync.c:2723 net/bluetooth/hci_sync.c:2841)\nhci_update_passive_scan_sync (net/bluetooth/hci_sync.c:2536 net/bluetooth/hci_sync.c:2723 net/bluetooth/hci_sync.c:2841)\n? __pfx_hci_update_passive_scan_sync (net/bluetooth/hci_sync.c:2780)\n? mutex_lock (kernel/locking/mutex.c:282)\n? __pfx_mutex_lock (kernel/locking/mutex.c:282)\n? __pfx_mutex_unlock (kernel/locking/mutex.c:538)\n? __pfx_update_passive_scan_sync (net/bluetooth/hci_sync.c:2861)\nhci_cmd_sync_work (net/bluetooth/hci_sync.c:306)\nprocess_one_work (./arch/x86/include/asm/preempt.h:27 kernel/workqueue.c:2399)\nworker_thread (./include/linux/list.h:292 kernel/workqueue.c:2538)\n? __pfx_worker_thread (kernel/workqueue.c:2480)\nkthread (kernel/kthread.c:376)\n? __pfx_kthread (kernel/kthread.c:331)\nret_from_fork (arch/x86/entry/entry_64.S:314)\n\u003c/TASK\u003e\n\nAllocated by task 31:\nkasan_save_stack (mm/kasan/common.c:46)\nkasan_set_track (mm/kasan/common.c:52)\n__kasan_kmalloc (mm/kasan/common.c:374 mm/kasan/common.c:383)\nhci_conn_params_add (./include/linux/slab.h:580 ./include/linux/slab.h:720 net/bluetooth/hci_core.c:2277)\nhci_connect_le_scan (net/bluetooth/hci_conn.c:1419 net/bluetooth/hci_conn.c:1589)\nhci_connect_cis (net/bluetooth/hci_conn.c:2266)\niso_connect_cis (net/bluetooth/iso.c:390)\niso_sock_connect (net/bluetooth/iso.c:899)\n__sys_connect (net/socket.c:2003 net/socket.c:2020)\n__x64_sys_connect (net/socket.c:2027)\ndo_syscall_64 (arch/x86/entry/common.c:50 arch/x86/entry/common.c:80)\nentry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:120)\n\nFreed by task 15:\nkasan_save_stack (mm/kasan/common.c:46)\nkasan_set_track (mm/kasan/common.c:52)\nkasan_save_free_info (mm/kasan/generic.c:523)\n__kasan_slab_free (mm/kasan/common.c:238 mm/kasan/common.c:200 mm/kasan/common.c:244)\n__kmem_cache_free (mm/slub.c:1807 mm/slub.c:3787 mm/slub.c:3800)\nhci_conn_params_del (net/bluetooth/hci_core.c:2323)\nle_scan_cleanup (net/bluetooth/hci_conn.c:202)\nprocess_one_work (./arch/x86/include/asm/preempt.\n---truncated---","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":"Bluetooth: use RCU for hci_conn_params and iterate safely in hci_sync","id":"CVE-2023-53252","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"use_after_free","year":"2023"},"n_packages":0,"n_references":3,"next":{"headline":"HID: nvidia-shield: Reference hid_device devm allocation of input_dev name","id":"CVE-2023-53253"},"packages":[],"prev":{"headline":"wifi: iwlwifi: pcie: fix NULL pointer dereference in iwl_pcie_irq_rx_msix_handler()","id":"CVE-2023-53251"},"products":["Linux"],"published":"2025-09-15","related":[{"cvss_score":8.8,"headline":"Linux Kernel Out-of-Bounds Write","id":"CVE-2026-53266","kev_date_added":"2026-09-18","published":"2026-06-25"},{"cvss_score":8.8,"headline":"Linux Kernel Improper Input Validation","id":"CVE-2013-6282","kev_date_added":"2022-09-15","published":"2013-11-19"},{"cvss_score":8.4,"headline":"Linux Kernel Heap-Based Buffer Overflow","id":"CVE-2022-0185","kev_date_added":"2024-08-21","published":"2022-02-11"},{"cvss_score":8.4,"headline":"Linux Kernel Privilege Escalation","id":"CVE-2013-2094","kev_date_added":"2022-09-15","published":"2013-05-14"},{"cvss_score":7.8,"headline":"Linux Kernel Unspecified","id":"CVE-2026-53362","kev_date_added":"2026-08-27","published":"2026-07-04"},{"cvss_score":7.8,"headline":"Linux Kernel Missing Initialization of a Variable","id":"CVE-2026-46300","kev_date_added":"2026-10-28","published":"2026-05-23"},{"cvss_score":7.8,"headline":"Linux Kernel Race Condition","id":"CVE-2025-39964","kev_date_added":"2026-09-18","published":"2025-10-13"}],"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":"total"},"state":"PUBLISHED","updated":"2026-08-05","vendors":["Linux"]},"summary":"A use-after-free vulnerability in the Linux kernel Bluetooth subsystem allows attackers to cause denial of service or potentially execute code via crafted Bluetooth operations.","url":"https://insights.sbomify.com/CVE-2023-53252/"}