{"cve":"CVE-2022-50639","nvd":{"published":"2025-12-09T01:16:46.280","modified":"2026-06-17T05:23:54.870","status":"Deferred","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nio-wq: Fix memory leak in worker creation\n\nIf the CPU mask allocation for a node fails, then the memory allocated for\nthe 'io_wqe' struct of the current node doesn't get freed on the error\nhandling path, since it has not yet been added to the 'wqes' array.\n\nThis was spotted when fuzzing v6.1-rc1 with Syzkaller:\nBUG: memory leak\nunreferenced object 0xffff8880093d5000 (size 1024):\n  comm \"syz-executor.2\", pid 7701, jiffies 4295048595 (age 13.900s)\n  hex dump (first 32 bytes):\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n  backtrace:\n    [<00000000cb463369>] __kmem_cache_alloc_node+0x18e/0x720\n    [<00000000147a3f9c>] kmalloc_node_trace+0x2a/0x130\n    [<000000004e107011>] io_wq_create+0x7b9/0xdc0\n    [<00000000c38b2018>] io_uring_alloc_task_context+0x31e/0x59d\n    [<00000000867399da>] __io_uring_add_tctx_node.cold+0x19/0x1ba\n    [<000000007e0e7a79>] io_uring_setup.cold+0x1b80/0x1dce\n    [<00000000b545e9f6>] __x64_sys_io_uring_setup+0x5d/0x80\n    [<000000008a8a7508>] do_syscall_64+0x5d/0x90\n    [<000000004ac08bec>] entry_SYSCALL_64_after_hwframe+0x63/0xcd","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/996d3efeb091c503afd3ee6b5e20eabf446fd955","https://git.kernel.org/stable/c/b6e2c54be37d5eb4f6666e6aa59cd0581c7ffc3c","https://git.kernel.org/stable/c/ed981911a7c90a604f4a2bee908ab07e3b786aca"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:16:40.427100871+00:00"},"epss":{"cve":"CVE-2022-50639","score":0.00197,"percentile":0.09489,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}