{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2023-52855 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2023-52855 is a medium-severity vulnerability in Linux kernel, published on 21 May 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-2023-52855 and fix it if it is affected.\n\nWhat it is: CVE-2023-52855 is a medium-severity vulnerability in Linux kernel, published on 21 May 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-2023-52855 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-2023-52855/ (Markdown: https://insights.sbomify.com/CVE-2023-52855/index.md)","id":"CVE-2023-52855","markdown":"https://insights.sbomify.com/CVE-2023-52855/index.md","name":"CVE-2023-52855","record":{"aliases":["BELL-CVE-2023-52855","DEBIAN-CVE-2023-52855","GHSA-5c84-c56q-jq6c","UBUNTU-CVE-2023-52855"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel USB driver","requires_auth":"low_privilege","summary":"A race condition in the Linux kernel dwc2 USB driver can cause a NULL pointer dereference, leading to a system crash.","user_interaction":"not_required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":5.5,"severity":"medium","source":"cisa-adp","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-476","name":"NULL Pointer Dereference"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: dwc2: fix possible NULL pointer dereference caused by driver concurrency\n\nIn _dwc2_hcd_urb_enqueue(), \"urb-\u003ehcpriv = NULL\" is executed without\nholding the lock \"hsotg-\u003elock\". In _dwc2_hcd_urb_dequeue():\n\n    spin_lock_irqsave(\u0026hsotg-\u003elock, flags);\n    ...\n\tif (!urb-\u003ehcpriv) {\n\t\tdev_dbg(hsotg-\u003edev, \"## urb-\u003ehcpriv is NULL ##\\n\");\n\t\tgoto out;\n\t}\n    rc = dwc2_hcd_urb_dequeue(hsotg, urb-\u003ehcpriv); // Use urb-\u003ehcpriv\n    ...\nout:\n    spin_unlock_irqrestore(\u0026hsotg-\u003elock, flags);\n\nWhen _dwc2_hcd_urb_enqueue() and _dwc2_hcd_urb_dequeue() are\nconcurrently executed, the NULL check of \"urb-\u003ehcpriv\" can be executed\nbefore \"urb-\u003ehcpriv = NULL\". After urb-\u003ehcpriv is NULL, it can be used\nin the function call to dwc2_hcd_urb_dequeue(), which can cause a NULL\npointer dereference.\n\nThis possible bug is found by an experimental static analysis tool\ndeveloped by myself. This tool analyzes the locking APIs to extract\nfunction pairs that can be concurrently executed, and then analyzes the\ninstructions in the paired functions to identify possible concurrency\nbugs including data races and atomicity violations. The above possible\nbug is reported, when my tool analyzes the source code of Linux 6.5.\n\nTo fix this possible bug, \"urb-\u003ehcpriv = NULL\" should be executed with\nholding the lock \"hsotg-\u003elock\". After using this patch, my tool never\nreports the possible bug, with the kernelconfiguration allyesconfig for\nx86_64. Because I have no associated hardware, I cannot test the patch\nin runtime testing, and just verify it according to the code logic.","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":"usb: dwc2: fix possible NULL pointer dereference caused by driver concurrency","id":"CVE-2023-52855","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"null_dereference","year":"2023"},"n_packages":0,"n_references":9,"next":{"headline":"drm/bridge: lt8912b: Fix crash on bridge detach","id":"CVE-2023-52856"},"packages":[],"prev":{"headline":"padata: Fix refcnt handling in padata_free_shell()","id":"CVE-2023-52854"},"products":["Linux"],"published":"2024-05-21","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":"partial"},"state":"PUBLISHED","updated":"2026-05-11","vendors":["Linux"]},"summary":"A race condition in the Linux kernel dwc2 USB driver can cause a NULL pointer dereference, leading to a system crash.","url":"https://insights.sbomify.com/CVE-2023-52855/"}