{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2024-39486 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2024-39486 is a high-severity use after free vulnerability in Linux kernel, published on 6 Jul 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-2024-39486 and fix it if it is affected.\n\nWhat it is: CVE-2024-39486 is a high-severity use after free vulnerability in Linux kernel, published on 6 Jul 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-2024-39486 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-2024-39486/ (Markdown: https://insights.sbomify.com/CVE-2024-39486/index.md)","id":"CVE-2024-39486","markdown":"https://insights.sbomify.com/CVE-2024-39486/index.md","name":"CVE-2024-39486","record":{"aliases":["BELL-CVE-2024-39486","DEBIAN-CVE-2024-39486","GHSA-wccc-2qv8-6647","UBUNTU-CVE-2024-39486"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["code_execution","privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A race condition in the Linux kernel DRM subsystem allows a use-after-free of a struct pid, potentially enabling local privilege escalation or code execution.","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\ndrm/drm_file: Fix pid refcounting race\n\n\u003cmaarten.lankhorst@linux.intel.com\u003e, Maxime Ripard\n\u003cmripard@kernel.org\u003e, Thomas Zimmermann \u003ctzimmermann@suse.de\u003e\n\nfilp-\u003epid is supposed to be a refcounted pointer; however, before this\npatch, drm_file_update_pid() only increments the refcount of a struct\npid after storing a pointer to it in filp-\u003epid and dropping the\ndev-\u003efilelist_mutex, making the following race possible:\n\nprocess A               process B\n=========               =========\n                        begin drm_file_update_pid\n                        mutex_lock(\u0026dev-\u003efilelist_mutex)\n                        rcu_replace_pointer(filp-\u003epid, \u003cpid B\u003e, 1)\n                        mutex_unlock(\u0026dev-\u003efilelist_mutex)\nbegin drm_file_update_pid\nmutex_lock(\u0026dev-\u003efilelist_mutex)\nrcu_replace_pointer(filp-\u003epid, \u003cpid A\u003e, 1)\nmutex_unlock(\u0026dev-\u003efilelist_mutex)\nget_pid(\u003cpid A\u003e)\nsynchronize_rcu()\nput_pid(\u003cpid B\u003e)   *** pid B reaches refcount 0 and is freed here ***\n                        get_pid(\u003cpid B\u003e)   *** UAF ***\n                        synchronize_rcu()\n                        put_pid(\u003cpid A\u003e)\n\nAs far as I know, this race can only occur with CONFIG_PREEMPT_RCU=y\nbecause it requires RCU to detect a quiescent state in code that is not\nexplicitly calling into the scheduler.\n\nThis race leads to use-after-free of a \"struct pid\".\nIt is probably somewhat hard to hit because process A has to pass\nthrough a synchronize_rcu() operation while process B is between\nmutex_unlock() and get_pid().\n\nFix it by ensuring that by the time a pointer to the current task's pid\nis stored in the file, an extra reference to the pid has been taken.\n\nThis fix also removes the condition for synchronize_rcu(); I think\nthat optimization is unnecessary complexity, since in that case we\nwould usually have bailed out on the lockless check above.","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":"drm/drm_file: Fix pid refcounting race","id":"CVE-2024-39486","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":3,"next":{"headline":"bonding: Fix out-of-bounds read in bond_option_arp_ip_targets_set()","id":"CVE-2024-39487"},"packages":[],"prev":{"headline":"media: v4l: async: Properly re-initialise notifier entry in unregister","id":"CVE-2024-39485"},"products":["Linux"],"published":"2024-07-06","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":"2026-08-05","vendors":["Linux"]},"summary":"A race condition in the Linux kernel DRM subsystem allows a use-after-free of a struct pid, potentially enabling local privilege escalation or code execution.","url":"https://insights.sbomify.com/CVE-2024-39486/"}