{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-47434 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2021-47434 is a medium-severity vulnerability in Linux kernel, published on 22 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-2021-47434 and fix it if it is affected.\n\nWhat it is: CVE-2021-47434 is a medium-severity vulnerability in Linux kernel, published on 22 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-2021-47434 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-2021-47434/ (Markdown: https://insights.sbomify.com/CVE-2021-47434/index.md)","id":"CVE-2021-47434","markdown":"https://insights.sbomify.com/CVE-2021-47434/index.md","name":"CVE-2021-47434","record":{"aliases":["DEBIAN-CVE-2021-47434","GHSA-5ggq-5m2f-79jm","UBUNTU-CVE-2021-47434"],"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 xHCI driver can corrupt the command ring pointer, leading to memory access failures and denial of service.","user_interaction":"not_required","vuln_class":"race_condition"},"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\nxhci: Fix command ring pointer corruption while aborting a command\n\nThe command ring pointer is located at [6:63] bits of the command\nring control register (CRCR). All the control bits like command stop,\nabort are located at [0:3] bits. While aborting a command, we read the\nCRCR and set the abort bit and write to the CRCR. The read will always\ngive command ring pointer as all zeros. So we essentially write only\nthe control bits. Since we split the 64 bit write into two 32 bit writes,\nthere is a possibility of xHC command ring stopped before the upper\ndword (all zeros) is written. If that happens, xHC updates the upper\ndword of its internal command ring pointer with all zeros. Next time,\nwhen the command ring is restarted, we see xHC memory access failures.\nFix this issue by only writing to the lower dword of CRCR where all\ncontrol bits are located.","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":"xhci: Fix command ring pointer corruption while aborting a command","id":"CVE-2021-47434","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"race_condition","year":"2021"},"n_packages":0,"n_references":6,"next":{"headline":"dm: fix mempool NULL pointer race when completing IO","id":"CVE-2021-47435"},"packages":[],"prev":{"headline":"btrfs: fix abort logic in btrfs_replace_file_extents","id":"CVE-2021-47433"},"products":["Linux"],"published":"2024-05-22","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":"2026-05-23","vendors":["Linux"]},"summary":"A race condition in the Linux kernel xHCI driver can corrupt the command ring pointer, leading to memory access failures and denial of service.","url":"https://insights.sbomify.com/CVE-2021-47434/"}