{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-47430 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2021-47430 is a low-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-2021-47430 and fix it if it is affected.\n\nWhat it is: CVE-2021-47430 is a low-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-2021-47430 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-2021-47430/ (Markdown: https://insights.sbomify.com/CVE-2021-47430/index.md)","id":"CVE-2021-47430","markdown":"https://insights.sbomify.com/CVE-2021-47430/index.md","name":"CVE-2021-47430","record":{"aliases":["DEBIAN-CVE-2021-47430","GHSA-7wxc-v995-9mmf","UBUNTU-CVE-2021-47430"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A kernel warning triggered by SMAP configuration mismatches can cause a denial of service in the Linux kernel.","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":3.3,"severity":"low","source":"nvd","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nx86/entry: Clear X86_FEATURE_SMAP when CONFIG_X86_SMAP=n\n\nCommit\n\n  3c73b81a9164 (\"x86/entry, selftests: Further improve user entry sanity checks\")\n\nadded a warning if AC is set when in the kernel.\n\nCommit\n\n  662a0221893a3d (\"x86/entry: Fix AC assertion\")\n\nchanged the warning to only fire if the CPU supports SMAP.\n\nHowever, the warning can still trigger on a machine that supports SMAP\nbut where it's disabled in the kernel config and when running the\nsyscall_nt selftest, for example:\n\n  ------------[ cut here ]------------\n  WARNING: CPU: 0 PID: 49 at irqentry_enter_from_user_mode\n  CPU: 0 PID: 49 Comm: init Tainted: G                T 5.15.0-rc4+ #98 e6202628ee053b4f310759978284bd8bb0ce6905\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 04/01/2014\n  RIP: 0010:irqentry_enter_from_user_mode\n  ...\n  Call Trace:\n   ? irqentry_enter\n   ? exc_general_protection\n   ? asm_exc_general_protection\n   ? asm_exc_general_protectio\n\nIS_ENABLED(CONFIG_X86_SMAP) could be added to the warning condition, but\neven this would not be enough in case SMAP is disabled at boot time with\nthe \"nosmap\" parameter.\n\nTo be consistent with \"nosmap\" behaviour, clear X86_FEATURE_SMAP when\n!CONFIG_X86_SMAP.\n\nFound using entry-fuzz + satrandconfig.\n\n [ bp: Massage commit message. ]","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":"x86/entry: Clear X86_FEATURE_SMAP when CONFIG_X86_SMAP=n","id":"CVE-2021-47430","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":3,"next":{"headline":"drm/amdgpu: fix gart.bo pin_count leak","id":"CVE-2021-47431"},"packages":[],"prev":{"headline":"powerpc/64s: Fix unrecoverable MCE calling async handler from NMI","id":"CVE-2021-47429"},"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 kernel warning triggered by SMAP configuration mismatches can cause a denial of service in the Linux kernel.","url":"https://insights.sbomify.com/CVE-2021-47430/"}