{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-47346 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2021-47346 is a high-severity memory corruption vulnerability in Linux kernel, published on 21 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-2021-47346 and fix it if it is affected.\n\nWhat it is: CVE-2021-47346 is a high-severity memory corruption vulnerability in Linux kernel, published on 21 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-2021-47346 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-2021-47346/ (Markdown: https://insights.sbomify.com/CVE-2021-47346/index.md)","id":"CVE-2021-47346","markdown":"https://insights.sbomify.com/CVE-2021-47346/index.md","name":"CVE-2021-47346","record":{"aliases":["DEBIAN-CVE-2021-47346","GHSA-3hw4-pvhh-9qcq","UBUNTU-CVE-2021-47346"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service","data_read"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A local attacker can trigger a global out-of-bounds read in the Linux kernel's CoreSight TMC ETF driver, potentially causing a crash or leaking memory.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":7.1,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-125","name":"Out-of-bounds Read"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncoresight: tmc-etf: Fix global-out-of-bounds in tmc_update_etf_buffer()\n\ncommit 6f755e85c332 (\"coresight: Add helper for inserting synchronization\npackets\") removed trailing '\\0' from barrier_pkt array and updated the\ncall sites like etb_update_buffer() to have proper checks for barrier_pkt\nsize before read but missed updating tmc_update_etf_buffer() which still\nreads barrier_pkt past the array size resulting in KASAN out-of-bounds\nbug. Fix this by adding a check for barrier_pkt size before accessing\nlike it is done in etb_update_buffer().\n\n BUG: KASAN: global-out-of-bounds in tmc_update_etf_buffer+0x4b8/0x698\n Read of size 4 at addr ffffffd05b7d1030 by task perf/2629\n\n Call trace:\n  dump_backtrace+0x0/0x27c\n  show_stack+0x20/0x2c\n  dump_stack+0x11c/0x188\n  print_address_description+0x3c/0x4a4\n  __kasan_report+0x140/0x164\n  kasan_report+0x10/0x18\n  __asan_report_load4_noabort+0x1c/0x24\n  tmc_update_etf_buffer+0x4b8/0x698\n  etm_event_stop+0x248/0x2d8\n  etm_event_del+0x20/0x2c\n  event_sched_out+0x214/0x6f0\n  group_sched_out+0xd0/0x270\n  ctx_sched_out+0x2ec/0x518\n  __perf_event_task_sched_out+0x4fc/0xe6c\n  __schedule+0x1094/0x16a0\n  preempt_schedule_irq+0x88/0x170\n  arm64_preempt_schedule_irq+0xf0/0x18c\n  el1_irq+0xe8/0x180\n  perf_event_exec+0x4d8/0x56c\n  setup_new_exec+0x204/0x400\n  load_elf_binary+0x72c/0x18c0\n  search_binary_handler+0x13c/0x420\n  load_script+0x500/0x6c4\n  search_binary_handler+0x13c/0x420\n  exec_binprm+0x118/0x654\n  __do_execve_file+0x77c/0xba4\n  __arm64_compat_sys_execve+0x98/0xac\n  el0_svc_common+0x1f8/0x5e0\n  el0_svc_compat_handler+0x84/0xb0\n  el0_svc_compat+0x10/0x50\n\n The buggy address belongs to the variable:\n  barrier_pkt+0x10/0x40\n\n Memory state around the buggy address:\n  ffffffd05b7d0f00: fa fa fa fa 04 fa fa fa fa fa fa fa 00 00 00 00\n  ffffffd05b7d0f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n \u003effffffd05b7d1000: 00 00 00 00 00 00 fa fa fa fa fa fa 00 00 00 03\n                                      ^\n  ffffffd05b7d1080: fa fa fa fa 00 02 fa fa fa fa fa fa 03 fa fa fa\n  ffffffd05b7d1100: fa fa fa fa 00 00 00 00 05 fa fa fa fa fa fa fa\n ==================================================================","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":"coresight: tmc-etf: Fix global-out-of-bounds in tmc_update_etf_buffer()","id":"CVE-2021-47346","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"memory_corruption","year":"2021"},"n_packages":0,"n_references":6,"next":{"headline":"wl1251: Fix possible buffer overflow in wl1251_cmd_scan","id":"CVE-2021-47347"},"packages":[],"prev":{"headline":"RDMA/cma: Fix rdma_resolve_route() memory leak","id":"CVE-2021-47345"},"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 local attacker can trigger a global out-of-bounds read in the Linux kernel's CoreSight TMC ETF driver, potentially causing a crash or leaking memory.","url":"https://insights.sbomify.com/CVE-2021-47346/"}