{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-47292 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2021-47292 is a medium-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-2021-47292 and fix it if it is affected.\n\nWhat it is: CVE-2021-47292 is a medium-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-2021-47292 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-2021-47292/ (Markdown: https://insights.sbomify.com/CVE-2021-47292/index.md)","id":"CVE-2021-47292","markdown":"https://insights.sbomify.com/CVE-2021-47292/index.md","name":"CVE-2021-47292","record":{"aliases":["GHSA-mrm7-vh23-g98v","UBUNTU-CVE-2021-47292"],"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 memory leak in the Linux kernel io_uring subsystem allows local attackers to exhaust system memory, causing denial of service.","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":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":[{"id":"CWE-401","name":"Missing Release of Memory after Effective Lifetime"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring: fix memleak in io_init_wq_offload()\n\nI got memory leak report when doing fuzz test:\n\nBUG: memory leak\nunreferenced object 0xffff888107310a80 (size 96):\ncomm \"syz-executor.6\", pid 4610, jiffies 4295140240 (age 20.135s)\nhex dump (first 32 bytes):\n01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\n00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00 .....N..........\nbacktrace:\n[\u003c000000001974933b\u003e] kmalloc include/linux/slab.h:591 [inline]\n[\u003c000000001974933b\u003e] kzalloc include/linux/slab.h:721 [inline]\n[\u003c000000001974933b\u003e] io_init_wq_offload fs/io_uring.c:7920 [inline]\n[\u003c000000001974933b\u003e] io_uring_alloc_task_context+0x466/0x640 fs/io_uring.c:7955\n[\u003c0000000039d0800d\u003e] __io_uring_add_tctx_node+0x256/0x360 fs/io_uring.c:9016\n[\u003c000000008482e78c\u003e] io_uring_add_tctx_node fs/io_uring.c:9052 [inline]\n[\u003c000000008482e78c\u003e] __do_sys_io_uring_enter fs/io_uring.c:9354 [inline]\n[\u003c000000008482e78c\u003e] __se_sys_io_uring_enter fs/io_uring.c:9301 [inline]\n[\u003c000000008482e78c\u003e] __x64_sys_io_uring_enter+0xabc/0xc20 fs/io_uring.c:9301\n[\u003c00000000b875f18f\u003e] do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n[\u003c00000000b875f18f\u003e] do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80\n[\u003c000000006b0a8484\u003e] entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nCPU0                          CPU1\nio_uring_enter                io_uring_enter\nio_uring_add_tctx_node        io_uring_add_tctx_node\n__io_uring_add_tctx_node      __io_uring_add_tctx_node\nio_uring_alloc_task_context   io_uring_alloc_task_context\nio_init_wq_offload            io_init_wq_offload\nhash = kzalloc                hash = kzalloc\nctx-\u003ehash_map = hash          ctx-\u003ehash_map = hash \u003c- one of the hash is leaked\n\nWhen calling io_uring_enter() in parallel, the 'hash_map' will be leaked,\nadd uring_lock to protect 'hash_map'.","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":"io_uring: fix memleak in io_init_wq_offload()","id":"CVE-2021-47292","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":2,"next":{"headline":"net/sched: act_skbmod: Skip non-Ethernet packets","id":"CVE-2021-47293"},"packages":[],"prev":{"headline":"ipv6: fix another slab-out-of-bounds in fib6_nh_flush_exceptions","id":"CVE-2021-47291"},"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":"2026-05-11","vendors":["Linux"]},"summary":"A memory leak in the Linux kernel io_uring subsystem allows local attackers to exhaust system memory, causing denial of service.","url":"https://insights.sbomify.com/CVE-2021-47292/"}