{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2024-53186 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2024-53186 is a critical use after free vulnerability in Linux kernel, published on 27 Dec 2024. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2024-53186 and fix it if it is affected.\n\nWhat it is: CVE-2024-53186 is a critical use after free vulnerability in Linux kernel, published on 27 Dec 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2024-53186 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-2024-53186/ (Markdown: https://insights.sbomify.com/CVE-2024-53186/index.md)","id":"CVE-2024-53186","markdown":"https://insights.sbomify.com/CVE-2024-53186/index.md","name":"CVE-2024-53186","record":{"aliases":["BELL-CVE-2024-53186","DEBIAN-CVE-2024-53186","GHSA-w9v5-63v9-9qvj","UBUNTU-CVE-2024-53186"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["code_execution","privilege_escalation"],"network_reachable":"yes","non_default_config":false,"product_category":"Linux kernel","requires_auth":"none","summary":"A race condition in the Linux kernel's ksmbd module allows attackers to trigger a use-after-free, potentially leading to code execution or privilege escalation.","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":9.8,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/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"},{"id":"CWE-416","name":"Use After Free"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix use-after-free in SMB request handling\n\nA race condition exists between SMB request handling in\n`ksmbd_conn_handler_loop()` and the freeing of `ksmbd_conn` in the\nworkqueue handler `handle_ksmbd_work()`. This leads to a UAF.\n- KASAN: slab-use-after-free Read in handle_ksmbd_work\n- KASAN: slab-use-after-free in rtlock_slowlock_locked\n\nThis race condition arises as follows:\n- `ksmbd_conn_handler_loop()` waits for `conn-\u003er_count` to reach zero:\n  `wait_event(conn-\u003er_count_q, atomic_read(\u0026conn-\u003er_count) == 0);`\n- Meanwhile, `handle_ksmbd_work()` decrements `conn-\u003er_count` using\n  `atomic_dec_return(\u0026conn-\u003er_count)`, and if it reaches zero, calls\n  `ksmbd_conn_free()`, which frees `conn`.\n- However, after `handle_ksmbd_work()` decrements `conn-\u003er_count`,\n  it may still access `conn-\u003er_count_q` in the following line:\n  `waitqueue_active(\u0026conn-\u003er_count_q)` or `wake_up(\u0026conn-\u003er_count_q)`\n  This results in a UAF, as `conn` has already been freed.\n\nThe discovery of this UAF can be referenced in the following PR for\nsyzkaller's support for SMB requests.","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":"ksmbd: fix use-after-free in SMB request handling","id":"CVE-2024-53186","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"use_after_free","year":"2024"},"n_packages":0,"n_references":4,"next":{"headline":"io_uring: check for overflows in io_pin_pages","id":"CVE-2024-53187"},"packages":[],"prev":{"headline":"smb: client: fix NULL ptr deref in crypto_aead_setkey()","id":"CVE-2024-53185"},"products":["Linux"],"published":"2024-12-27","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 race condition in the Linux kernel's ksmbd module allows attackers to trigger a use-after-free, potentially leading to code execution or privilege escalation.","url":"https://insights.sbomify.com/CVE-2024-53186/"}