{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-47183 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2021-47183 is a high-severity vulnerability in Linux kernel, published on 10 Apr 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-2021-47183 and fix it if it is affected.\n\nWhat it is: CVE-2021-47183 is a high-severity vulnerability in Linux kernel, published on 10 Apr 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-2021-47183 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-2021-47183/ (Markdown: https://insights.sbomify.com/CVE-2021-47183/index.md)","id":"CVE-2021-47183","markdown":"https://insights.sbomify.com/CVE-2021-47183/index.md","name":"CVE-2021-47183","record":{"aliases":["DEBIAN-CVE-2021-47183","GHSA-m7wr-q7cm-56rh","ROOT-OS-DEBIAN-11-CVE-2021-47183","UBUNTU-CVE-2021-47183"],"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":"none","summary":"A NULL pointer dereference in the Linux kernel lpfc driver can cause a denial of service during specific Fibre Channel link down transitions.","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":8.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-476","name":"NULL Pointer Dereference"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: lpfc: Fix link down processing to address NULL pointer dereference\n\nIf an FC link down transition while PLOGIs are outstanding to fabric well\nknown addresses, outstanding ABTS requests may result in a NULL pointer\ndereference. Driver unload requests may hang with repeated \"2878\" log\nmessages.\n\nThe Link down processing results in ABTS requests for outstanding ELS\nrequests. The Abort WQEs are sent for the ELSs before the driver had set\nthe link state to down. Thus the driver is sending the Abort with the\nexpectation that an ABTS will be sent on the wire. The Abort request is\nstalled waiting for the link to come up. In some conditions the driver may\nauto-complete the ELSs thus if the link does come up, the Abort completions\nmay reference an invalid structure.\n\nFix by ensuring that Abort set the flag to avoid link traffic if issued due\nto conditions where the link failed.","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":"scsi: lpfc: Fix link down processing to address NULL pointer dereference","id":"CVE-2021-47183","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":3,"next":{"headline":"i40e: Fix NULL ptr dereference on VSI filter sync","id":"CVE-2021-47184"},"packages":[],"prev":{"headline":"scsi: core: Fix scsi_mode_sense() buffer length handling","id":"CVE-2021-47182"},"products":["Linux"],"published":"2024-04-10","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":"2026-08-05","vendors":["Linux"]},"summary":"A NULL pointer dereference in the Linux kernel lpfc driver can cause a denial of service during specific Fibre Channel link down transitions.","url":"https://insights.sbomify.com/CVE-2021-47183/"}