{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-47424 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2021-47424 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-2021-47424 and fix it if it is affected.\n\nWhat it is: CVE-2021-47424 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-2021-47424 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-2021-47424/ (Markdown: https://insights.sbomify.com/CVE-2021-47424/index.md)","id":"CVE-2021-47424","markdown":"https://insights.sbomify.com/CVE-2021-47424/index.md","name":"CVE-2021-47424","record":{"aliases":["DEBIAN-CVE-2021-47424","GHSA-hf7w-m8fc-q8fp","UBUNTU-CVE-2021-47424"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel driver","requires_auth":"low_privilege","summary":"A flaw in the i40e network driver causes a kernel Oops when freeing uninitialized IRQ vectors during failed probe, leading to denial of service.","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":"nvd","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-908","name":"Use of Uninitialized Resource"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\ni40e: Fix freeing of uninitialized misc IRQ vector\n\nWhen VSI set up failed in i40e_probe() as part of PF switch set up\ndriver was trying to free misc IRQ vectors in\ni40e_clear_interrupt_scheme and produced a kernel Oops:\n\n   Trying to free already-free IRQ 266\n   WARNING: CPU: 0 PID: 5 at kernel/irq/manage.c:1731 __free_irq+0x9a/0x300\n   Workqueue: events work_for_cpu_fn\n   RIP: 0010:__free_irq+0x9a/0x300\n   Call Trace:\n   ? synchronize_irq+0x3a/0xa0\n   free_irq+0x2e/0x60\n   i40e_clear_interrupt_scheme+0x53/0x190 [i40e]\n   i40e_probe.part.108+0x134b/0x1a40 [i40e]\n   ? kmem_cache_alloc+0x158/0x1c0\n   ? acpi_ut_update_ref_count.part.1+0x8e/0x345\n   ? acpi_ut_update_object_reference+0x15e/0x1e2\n   ? strstr+0x21/0x70\n   ? irq_get_irq_data+0xa/0x20\n   ? mp_check_pin_attr+0x13/0xc0\n   ? irq_get_irq_data+0xa/0x20\n   ? mp_map_pin_to_irq+0xd3/0x2f0\n   ? acpi_register_gsi_ioapic+0x93/0x170\n   ? pci_conf1_read+0xa4/0x100\n   ? pci_bus_read_config_word+0x49/0x70\n   ? do_pci_enable_device+0xcc/0x100\n   local_pci_probe+0x41/0x90\n   work_for_cpu_fn+0x16/0x20\n   process_one_work+0x1a7/0x360\n   worker_thread+0x1cf/0x390\n   ? create_worker+0x1a0/0x1a0\n   kthread+0x112/0x130\n   ? kthread_flush_work_fn+0x10/0x10\n   ret_from_fork+0x1f/0x40\n\nThe problem is that at that point misc IRQ vectors\nwere not allocated yet and we get a call trace\nthat driver is trying to free already free IRQ vectors.\n\nAdd a check in i40e_clear_interrupt_scheme for __I40E_MISC_IRQ_REQUESTED\nPF state before calling i40e_free_misc_vector. This state is set only if\nmisc IRQ vectors were properly initialized.","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":"i40e: Fix freeing of uninitialized misc IRQ vector","id":"CVE-2021-47424","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"null_dereference","year":"2021"},"n_packages":0,"n_references":5,"next":{"headline":"i2c: acpi: fix resource leak in reconfiguration device addition","id":"CVE-2021-47425"},"packages":[],"prev":{"headline":"drm/nouveau/debugfs: fix file release memory leak","id":"CVE-2021-47423"},"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 flaw in the i40e network driver causes a kernel Oops when freeing uninitialized IRQ vectors during failed probe, leading to denial of service.","url":"https://insights.sbomify.com/CVE-2021-47424/"}