{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-47174 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2021-47174 is a medium-severity denial of service vulnerability in Linux kernel, published on 25 Mar 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-2021-47174 and fix it if it is affected.\n\nWhat it is: CVE-2021-47174 is a medium-severity denial of service vulnerability in Linux kernel, published on 25 Mar 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-2021-47174 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-2021-47174/ (Markdown: https://insights.sbomify.com/CVE-2021-47174/index.md)","id":"CVE-2021-47174","markdown":"https://insights.sbomify.com/CVE-2021-47174/index.md","name":"CVE-2021-47174","record":{"aliases":["DEBIAN-CVE-2021-47174","GHSA-p5xw-cvrw-p372","UBUNTU-CVE-2021-47174"],"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 missing check in the Linux kernel netfilter module can trigger a kernel warning and potential crash when AVX2 instructions are used in interrupt context.","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\nnetfilter: nft_set_pipapo_avx2: Add irq_fpu_usable() check, fallback to non-AVX2 version\n\nArturo reported this backtrace:\n\n[709732.358791] WARNING: CPU: 3 PID: 456 at arch/x86/kernel/fpu/core.c:128 kernel_fpu_begin_mask+0xae/0xe0\n[709732.358793] Modules linked in: binfmt_misc nft_nat nft_chain_nat nf_nat nft_counter nft_ct nf_tables nf_conntrack_netlink nfnetlink 8021q garp stp mrp llc vrf intel_rapl_msr intel_rapl_common skx_edac nfit libnvdimm ipmi_ssif x86_pkg_temp_thermal intel_powerclamp coretemp crc32_pclmul mgag200 ghash_clmulni_intel drm_kms_helper cec aesni_intel drm libaes crypto_simd cryptd glue_helper mei_me dell_smbios iTCO_wdt evdev intel_pmc_bxt iTCO_vendor_support dcdbas pcspkr rapl dell_wmi_descriptor wmi_bmof sg i2c_algo_bit watchdog mei acpi_ipmi ipmi_si button nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ipmi_devintf ipmi_msghandler ip_tables x_tables autofs4 ext4 crc16 mbcache jbd2 dm_mod raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor sd_mod t10_pi crc_t10dif crct10dif_generic raid6_pq libcrc32c crc32c_generic raid1 raid0 multipath linear md_mod ahci libahci tg3 libata xhci_pci libphy xhci_hcd ptp usbcore crct10dif_pclmul crct10dif_common bnxt_en crc32c_intel scsi_mod\n[709732.358941]  pps_core i2c_i801 lpc_ich i2c_smbus wmi usb_common\n[709732.358957] CPU: 3 PID: 456 Comm: jbd2/dm-0-8 Not tainted 5.10.0-0.bpo.5-amd64 #1 Debian 5.10.24-1~bpo10+1\n[709732.358959] Hardware name: Dell Inc. PowerEdge R440/04JN2K, BIOS 2.9.3 09/23/2020\n[709732.358964] RIP: 0010:kernel_fpu_begin_mask+0xae/0xe0\n[709732.358969] Code: ae 54 24 04 83 e3 01 75 38 48 8b 44 24 08 65 48 33 04 25 28 00 00 00 75 33 48 83 c4 10 5b c3 65 8a 05 5e 21 5e 76 84 c0 74 92 \u003c0f\u003e 0b eb 8e f0 80 4f 01 40 48 81 c7 00 14 00 00 e8 dd fb ff ff eb\n[709732.358972] RSP: 0018:ffffbb9700304740 EFLAGS: 00010202\n[709732.358976] RAX: 0000000000000001 RBX: 0000000000000003 RCX: 0000000000000001\n[709732.358979] RDX: ffffbb9700304970 RSI: ffff922fe1952e00 RDI: 0000000000000003\n[709732.358981] RBP: ffffbb9700304970 R08: ffff922fc868a600 R09: ffff922fc711e462\n[709732.358984] R10: 000000000000005f R11: ffff922ff0b27180 R12: ffffbb9700304960\n[709732.358987] R13: ffffbb9700304b08 R14: ffff922fc664b6c8 R15: ffff922fc664b660\n[709732.358990] FS:  0000000000000000(0000) GS:ffff92371fec0000(0000) knlGS:0000000000000000\n[709732.358993] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[709732.358996] CR2: 0000557a6655bdd0 CR3: 000000026020a001 CR4: 00000000007706e0\n[709732.358999] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[709732.359001] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n[709732.359003] PKRU: 55555554\n[709732.359005] Call Trace:\n[709732.359009]  \u003cIRQ\u003e\n[709732.359035]  nft_pipapo_avx2_lookup+0x4c/0x1cba [nf_tables]\n[709732.359046]  ? sched_clock+0x5/0x10\n[709732.359054]  ? sched_clock_cpu+0xc/0xb0\n[709732.359061]  ? record_times+0x16/0x80\n[709732.359068]  ? plist_add+0xc1/0x100\n[709732.359073]  ? psi_group_change+0x47/0x230\n[709732.359079]  ? skb_clone+0x4d/0xb0\n[709732.359085]  ? enqueue_task_rt+0x22b/0x310\n[709732.359098]  ? bnxt_start_xmit+0x1e8/0xaf0 [bnxt_en]\n[709732.359102]  ? packet_rcv+0x40/0x4a0\n[709732.359121]  nft_lookup_eval+0x59/0x160 [nf_tables]\n[709732.359133]  nft_do_chain+0x350/0x500 [nf_tables]\n[709732.359152]  ? nft_lookup_eval+0x59/0x160 [nf_tables]\n[709732.359163]  ? nft_do_chain+0x364/0x500 [nf_tables]\n[709732.359172]  ? fib4_rule_action+0x6d/0x80\n[709732.359178]  ? fib_rules_lookup+0x107/0x250\n[709732.359184]  nft_nat_do_chain+0x8a/0xf2 [nft_chain_nat]\n[709732.359193]  nf_nat_inet_fn+0xea/0x210 [nf_nat]\n[709732.359202]  nf_nat_ipv4_out+0x14/0xa0 [nf_nat]\n[709732.359207]  nf_hook_slow+0x44/0xc0\n[709732.359214]  ip_output+0xd2/0x100\n[709732.359221]  ? __ip_finish_output+0x210/0x210\n[709732.359226]  ip_forward+0x37d/0x4a0\n[709732.359232]  ? ip4_key_hashfn+0xb0/0xb0\n[709732.359238]  ip_subli\n---truncated---","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":"netfilter: nft_set_pipapo_avx2: Add irq_fpu_usable() check, fallback to non-AVX2 version","id":"CVE-2021-47174","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":"net/sched: fq_pie: fix OOB access in the traffic path","id":"CVE-2021-47175"},"packages":[],"prev":{"headline":"misc/uss720: fix memory leak in uss720_probe","id":"CVE-2021-47173"},"products":["Linux"],"published":"2024-03-25","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 missing check in the Linux kernel netfilter module can trigger a kernel warning and potential crash when AVX2 instructions are used in interrupt context.","url":"https://insights.sbomify.com/CVE-2021-47174/"}