{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-47429 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2021-47429 is a medium-severity denial of service 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-2021-47429 and fix it if it is affected.\n\nWhat it is: CVE-2021-47429 is a medium-severity denial of service 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-2021-47429 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-2021-47429/ (Markdown: https://insights.sbomify.com/CVE-2021-47429/index.md)","id":"CVE-2021-47429","markdown":"https://insights.sbomify.com/CVE-2021-47429/index.md","name":"CVE-2021-47429","record":{"aliases":["DEBIAN-CVE-2021-47429","GHSA-g8c8-mwvp-jcrr","UBUNTU-CVE-2021-47429"],"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 flaw in the Linux kernel's PowerPC machine check handler can cause system crashes when handling unrecoverable errors, leading to denial of service.","user_interaction":"not_required","vuln_class":"denial_of_service"},"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":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/64s: Fix unrecoverable MCE calling async handler from NMI\n\nThe machine check handler is not considered NMI on 64s. The early\nhandler is the true NMI handler, and then it schedules the\nmachine_check_exception handler to run when interrupts are enabled.\n\nThis works fine except the case of an unrecoverable MCE, where the true\nNMI is taken when MSR[RI] is clear, it can not recover, so it calls\nmachine_check_exception directly so something might be done about it.\n\nCalling an async handler from NMI context can result in irq state and\nother things getting corrupted. This can also trigger the BUG at\n  arch/powerpc/include/asm/interrupt.h:168\n  BUG_ON(!arch_irq_disabled_regs(regs) \u0026\u0026 !(regs-\u003emsr \u0026 MSR_EE));\n\nFix this by making an _async version of the handler which is called\nin the normal case, and a NMI version that is called for unrecoverable\ninterrupts.","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":"powerpc/64s: Fix unrecoverable MCE calling async handler from NMI","id":"CVE-2021-47429","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"denial_of_service","year":"2021"},"n_packages":0,"n_references":2,"next":{"headline":"x86/entry: Clear X86_FEATURE_SMAP when CONFIG_X86_SMAP=n","id":"CVE-2021-47430"},"packages":[],"prev":{"headline":"powerpc/64s: fix program check interrupt emergency stack path","id":"CVE-2021-47428"},"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":"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 Linux kernel's PowerPC machine check handler can cause system crashes when handling unrecoverable errors, leading to denial of service.","url":"https://insights.sbomify.com/CVE-2021-47429/"}