{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2024-36899 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2024-36899 is a high-severity use after free vulnerability in Linux kernel, published on 30 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-2024-36899 and fix it if it is affected.\n\nWhat it is: CVE-2024-36899 is a high-severity use after free vulnerability in Linux kernel, published on 30 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-2024-36899 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-2024-36899/ (Markdown: https://insights.sbomify.com/CVE-2024-36899/index.md)","id":"CVE-2024-36899","markdown":"https://insights.sbomify.com/CVE-2024-36899/index.md","name":"CVE-2024-36899","record":{"aliases":["AZL-55548","BELL-CVE-2024-36899","DEBIAN-CVE-2024-36899","UBUNTU-CVE-2024-36899"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A race condition in the Linux kernel GPIO subsystem causes a use-after-free, potentially leading to a denial of service.","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,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-416","name":"Use After Free"},{"id":"CWE-362","name":"Concurrent Execution using Shared Resource with Improper Synchronization"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\ngpiolib: cdev: Fix use after free in lineinfo_changed_notify\n\nThe use-after-free issue occurs as follows: when the GPIO chip device file\nis being closed by invoking gpio_chrdev_release(), watched_lines is freed\nby bitmap_free(), but the unregistration of lineinfo_changed_nb notifier\nchain failed due to waiting write rwsem. Additionally, one of the GPIO\nchip's lines is also in the release process and holds the notifier chain's\nread rwsem. Consequently, a race condition leads to the use-after-free of\nwatched_lines.\n\nHere is the typical stack when issue happened:\n\n[free]\ngpio_chrdev_release()\n  --\u003e bitmap_free(cdev-\u003ewatched_lines)                  \u003c-- freed\n  --\u003e blocking_notifier_chain_unregister()\n    --\u003e down_write(\u0026nh-\u003erwsem)                          \u003c-- waiting rwsem\n          --\u003e __down_write_common()\n            --\u003e rwsem_down_write_slowpath()\n                  --\u003e schedule_preempt_disabled()\n                    --\u003e schedule()\n\n[use]\nst54spi_gpio_dev_release()\n  --\u003e gpio_free()\n    --\u003e gpiod_free()\n      --\u003e gpiod_free_commit()\n        --\u003e gpiod_line_state_notify()\n          --\u003e blocking_notifier_call_chain()\n            --\u003e down_read(\u0026nh-\u003erwsem);                  \u003c-- held rwsem\n            --\u003e notifier_call_chain()\n              --\u003e lineinfo_changed_notify()\n                --\u003e test_bit(xxxx, cdev-\u003ewatched_lines) \u003c-- use after free\n\nThe side effect of the use-after-free issue is that a GPIO line event is\nbeing generated for userspace where it shouldn't. However, since the chrdev\nis being closed, userspace won't have the chance to read that event anyway.\n\nTo fix the issue, call the bitmap_free() function after the unregistration\nof lineinfo_changed_nb notifier chain.","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":"gpiolib: cdev: Fix use after free in lineinfo_changed_notify","id":"CVE-2024-36899","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":6,"next":{"headline":"net: hns3: fix kernel crash when devlink reload during initialization","id":"CVE-2024-36900"},"packages":[],"prev":{"headline":"gpiolib: cdev: fix uninitialised kfifo","id":"CVE-2024-36898"},"products":["Linux"],"published":"2024-05-30","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":"2026-10-15","vendors":["Linux"]},"summary":"A race condition in the Linux kernel GPIO subsystem causes a use-after-free, potentially leading to a denial of service.","url":"https://insights.sbomify.com/CVE-2024-36899/"}