{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-47290 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-47290 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-47290 is a high-severity vulnerability in Linux kernel, published on 21 May 2024. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-47290 and fix it if it is affected.\n\nWhat it is: CVE-2021-47290 is a high-severity vulnerability in Linux kernel, published on 21 May 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-47290 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-2021-47290/ (Markdown: https://insights.sbomify.com/CVE-2021-47290/index.md)","id":"CVE-2021-47290","markdown":"https://insights.sbomify.com/CVE-2021-47290/index.md","name":"CVE-2021-47290","record":{"aliases":["GHSA-xqq2-v4rf-49qr","UBUNTU-CVE-2021-47290"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Linux kernel SCSI target","requires_auth":"none","summary":"A NULL pointer dereference in the Linux kernel SCSI target module allows local attackers to cause a system crash via EXTENDED COPY commands.","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":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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: target: Fix NULL dereference on XCOPY completion\n\nCPU affinity control added with commit 39ae3edda325 (\"scsi: target: core:\nMake completion affinity configurable\") makes target_complete_cmd() queue\nwork on a CPU based on se_tpg-\u003ese_tpg_wwn-\u003ecmd_compl_affinity state.\n\nLIO's EXTENDED COPY worker is a special case in that read/write cmds are\ndispatched using the global xcopy_pt_tpg, which carries a NULL se_tpg_wwn\npointer following initialization in target_xcopy_setup_pt().\n\nThe NULL xcopy_pt_tpg-\u003ese_tpg_wwn pointer is dereferenced on completion of\nany EXTENDED COPY initiated read/write cmds. E.g using the libiscsi\nSCSI.ExtendedCopy.Simple test:\n\n  BUG: kernel NULL pointer dereference, address: 00000000000001a8\n  RIP: 0010:target_complete_cmd+0x9d/0x130 [target_core_mod]\n  Call Trace:\n   fd_execute_rw+0x148/0x42a [target_core_file]\n   ? __dynamic_pr_debug+0xa7/0xe0\n   ? target_check_reservation+0x5b/0x940 [target_core_mod]\n   __target_execute_cmd+0x1e/0x90 [target_core_mod]\n   transport_generic_new_cmd+0x17c/0x330 [target_core_mod]\n   target_xcopy_issue_pt_cmd+0x9/0x60 [target_core_mod]\n   target_xcopy_read_source.isra.7+0x10b/0x1b0 [target_core_mod]\n   ? target_check_fua+0x40/0x40 [target_core_mod]\n   ? transport_complete_task_attr+0x130/0x130 [target_core_mod]\n   target_xcopy_do_work+0x61f/0xc00 [target_core_mod]\n\nThis fix makes target_complete_cmd() queue work on se_cmd-\u003ecpuid if\nse_tpg_wwn is NULL.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"scsi: target: Fix NULL dereference on XCOPY completion","id":"CVE-2021-47290","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":2,"next":{"headline":"ipv6: fix another slab-out-of-bounds in fib6_nh_flush_exceptions","id":"CVE-2021-47291"},"packages":[],"prev":{"headline":"ACPI: fix NULL pointer dereference","id":"CVE-2021-47289"},"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":"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 SCSI target module allows local attackers to cause a system crash via EXTENDED COPY commands.","url":"https://insights.sbomify.com/CVE-2021-47290/"}