{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2023-53520 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2023-53520 is a high-severity vulnerability in Linux kernel, published on 1 Oct 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-2023-53520 and fix it if it is affected.\n\nWhat it is: CVE-2023-53520 is a high-severity vulnerability in Linux kernel, published on 1 Oct 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-2023-53520 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-2023-53520/ (Markdown: https://insights.sbomify.com/CVE-2023-53520/index.md)","id":"CVE-2023-53520","markdown":"https://insights.sbomify.com/CVE-2023-53520/index.md","name":"CVE-2023-53520","record":{"aliases":["AZL-75246","BELL-CVE-2023-53520","DEBIAN-CVE-2023-53520","GHSA-fxhr-ffpx-g953","ROOT-OS-DEBIAN-11-CVE-2023-53520","ROOT-OS-UBUNTU-2204-CVE-2023-53520","UBUNTU-CVE-2023-53520"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel Bluetooth","requires_auth":"low_privilege","summary":"A race condition in the Linux kernel Bluetooth subsystem can cause a system crash when unregistering a device during suspend.","user_interaction":"not_required","vuln_class":"race_condition"},"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-362","name":"Concurrent Execution using Shared Resource with Improper Synchronization"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: Fix hci_suspend_sync crash\n\nIf hci_unregister_dev() frees the hci_dev object but hci_suspend_notifier\nmay still be accessing it, it can cause the program to crash.\nHere's the call trace:\n  \u003c4\u003e[102152.653246] Call Trace:\n  \u003c4\u003e[102152.653254]  hci_suspend_sync+0x109/0x301 [bluetooth]\n  \u003c4\u003e[102152.653259]  hci_suspend_dev+0x78/0xcd [bluetooth]\n  \u003c4\u003e[102152.653263]  hci_suspend_notifier+0x42/0x7a [bluetooth]\n  \u003c4\u003e[102152.653268]  notifier_call_chain+0x43/0x6b\n  \u003c4\u003e[102152.653271]  __blocking_notifier_call_chain+0x48/0x69\n  \u003c4\u003e[102152.653273]  __pm_notifier_call_chain+0x22/0x39\n  \u003c4\u003e[102152.653276]  pm_suspend+0x287/0x57c\n  \u003c4\u003e[102152.653278]  state_store+0xae/0xe5\n  \u003c4\u003e[102152.653281]  kernfs_fop_write+0x109/0x173\n  \u003c4\u003e[102152.653284]  __vfs_write+0x16f/0x1a2\n  \u003c4\u003e[102152.653287]  ? selinux_file_permission+0xca/0x16f\n  \u003c4\u003e[102152.653289]  ? security_file_permission+0x36/0x109\n  \u003c4\u003e[102152.653291]  vfs_write+0x114/0x21d\n  \u003c4\u003e[102152.653293]  __x64_sys_write+0x7b/0xdb\n  \u003c4\u003e[102152.653296]  do_syscall_64+0x59/0x194\n  \u003c4\u003e[102152.653299]  entry_SYSCALL_64_after_hwframe+0x5c/0xc1\n\nThis patch holds the reference count of the hci_dev object while\nprocessing it in hci_suspend_notifier to avoid potential crash\ncaused by the race condition.","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: Fix hci_suspend_sync crash","id":"CVE-2023-53520","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"race_condition","year":"2023"},"n_packages":0,"n_references":4,"next":{"headline":"scsi: ses: Fix slab-out-of-bounds in ses_intf_remove()","id":"CVE-2023-53521"},"packages":[],"prev":{"headline":"media: v4l2-mem2mem: add lock to protect parameter num_rdy","id":"CVE-2023-53519"},"products":["Linux"],"published":"2025-10-01","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":"2026-10-15","vendors":["Linux"]},"summary":"A race condition in the Linux kernel Bluetooth subsystem can cause a system crash when unregistering a device during suspend.","url":"https://insights.sbomify.com/CVE-2023-53520/"}