{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-47576 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2021-47576 is a high-severity use after free vulnerability in Linux kernel, published on 19 Jun 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-2021-47576 and fix it if it is affected.\n\nWhat it is: CVE-2021-47576 is a high-severity use after free vulnerability in Linux kernel, published on 19 Jun 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-2021-47576 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-2021-47576/ (Markdown: https://insights.sbomify.com/CVE-2021-47576/index.md)","id":"CVE-2021-47576","markdown":"https://insights.sbomify.com/CVE-2021-47576/index.md","name":"CVE-2021-47576","record":{"aliases":["DEBIAN-CVE-2021-47576","GHSA-r5hw-wwq6-43px","UBUNTU-CVE-2021-47576"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["code_execution","privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A use-after-free vulnerability in the Linux kernel's scsi_debug driver allows local attackers to potentially execute arbitrary code or escalate privileges.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":7.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-416","name":"Use After Free"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: scsi_debug: Sanity check block descriptor length in resp_mode_select()\n\nIn resp_mode_select() sanity check the block descriptor len to avoid UAF.\n\nBUG: KASAN: use-after-free in resp_mode_select+0xa4c/0xb40 drivers/scsi/scsi_debug.c:2509\nRead of size 1 at addr ffff888026670f50 by task scsicmd/15032\n\nCPU: 1 PID: 15032 Comm: scsicmd Not tainted 5.15.0-01d0625 #15\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS\nCall Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x89/0xb5 lib/dump_stack.c:107\n print_address_description.constprop.9+0x28/0x160 mm/kasan/report.c:257\n kasan_report.cold.14+0x7d/0x117 mm/kasan/report.c:443\n __asan_report_load1_noabort+0x14/0x20 mm/kasan/report_generic.c:306\n resp_mode_select+0xa4c/0xb40 drivers/scsi/scsi_debug.c:2509\n schedule_resp+0x4af/0x1a10 drivers/scsi/scsi_debug.c:5483\n scsi_debug_queuecommand+0x8c9/0x1e70 drivers/scsi/scsi_debug.c:7537\n scsi_queue_rq+0x16b4/0x2d10 drivers/scsi/scsi_lib.c:1521\n blk_mq_dispatch_rq_list+0xb9b/0x2700 block/blk-mq.c:1640\n __blk_mq_sched_dispatch_requests+0x28f/0x590 block/blk-mq-sched.c:325\n blk_mq_sched_dispatch_requests+0x105/0x190 block/blk-mq-sched.c:358\n __blk_mq_run_hw_queue+0xe5/0x150 block/blk-mq.c:1762\n __blk_mq_delay_run_hw_queue+0x4f8/0x5c0 block/blk-mq.c:1839\n blk_mq_run_hw_queue+0x18d/0x350 block/blk-mq.c:1891\n blk_mq_sched_insert_request+0x3db/0x4e0 block/blk-mq-sched.c:474\n blk_execute_rq_nowait+0x16b/0x1c0 block/blk-exec.c:63\n sg_common_write.isra.18+0xeb3/0x2000 drivers/scsi/sg.c:837\n sg_new_write.isra.19+0x570/0x8c0 drivers/scsi/sg.c:775\n sg_ioctl_common+0x14d6/0x2710 drivers/scsi/sg.c:941\n sg_ioctl+0xa2/0x180 drivers/scsi/sg.c:1166\n __x64_sys_ioctl+0x19d/0x220 fs/ioctl.c:52\n do_syscall_64+0x3a/0x80 arch/x86/entry/common.c:50\n entry_SYSCALL_64_after_hwframe+0x44/0xae arch/x86/entry/entry_64.S:113","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: scsi_debug: Sanity check block descriptor length in resp_mode_select()","id":"CVE-2021-47576","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"use_after_free","year":"2021"},"n_packages":0,"n_references":7,"next":{"headline":"io-wq: check for wq exit after adding new worker task_work","id":"CVE-2021-47577"},"packages":[],"prev":{"headline":"This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.","id":"CVE-2021-47575"},"products":["Linux"],"published":"2024-06-19","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 use-after-free vulnerability in the Linux kernel's scsi_debug driver allows local attackers to potentially execute arbitrary code or escalate privileges.","url":"https://insights.sbomify.com/CVE-2021-47576/"}