{"id":"CVE-2022-49223","summary":"cxl/port: Hold port reference until decoder release","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ncxl/port: Hold port reference until decoder release\n\nKASAN + DEBUG_KOBJECT_RELEASE reports a potential use-after-free in\ncxl_decoder_release() where it goes to reference its parent, a cxl_port,\nto free its id back to port-\u003edecoder_ida.\n\n BUG: KASAN: use-after-free in to_cxl_port+0x18/0x90 [cxl_core]\n Read of size 8 at addr ffff888119270908 by task kworker/35:2/379\n\n CPU: 35 PID: 379 Comm: kworker/35:2 Tainted: G           OE     5.17.0-rc2+ #198\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015\n Workqueue: events kobject_delayed_cleanup\n Call Trace:\n  \u003cTASK\u003e\n  dump_stack_lvl+0x59/0x73\n  print_address_description.constprop.0+0x1f/0x150\n  ? to_cxl_port+0x18/0x90 [cxl_core]\n  kasan_report.cold+0x83/0xdf\n  ? to_cxl_port+0x18/0x90 [cxl_core]\n  to_cxl_port+0x18/0x90 [cxl_core]\n  cxl_decoder_release+0x2a/0x60 [cxl_core]\n  device_release+0x5f/0x100\n  kobject_cleanup+0x80/0x1c0\n\nThe device core only guarantees parent lifetime until all children are\nunregistered. If a child needs a parent to complete its -\u003erelease()\ncallback that child needs to hold a reference to extend the lifetime of\nthe parent.","modified":"2026-04-02T08:27:23.900748Z","published":"2025-02-26T01:55:54.274Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49223.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/49f2dab77a5e1354f5da6ccdc9346a8212697be2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/518bb96367123062b48b0a9842f2864249b565f6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/74be98774dfbc5b8b795db726bd772e735d2edd4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b0022ca445d5fc4d0c89d15dcd0f855977b22c1d"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49223.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-49223"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"40ba17afdfabb01688c61565dbe02a916241bc05"},{"fixed":"518bb96367123062b48b0a9842f2864249b565f6"},{"fixed":"b0022ca445d5fc4d0c89d15dcd0f855977b22c1d"},{"fixed":"49f2dab77a5e1354f5da6ccdc9346a8212697be2"},{"fixed":"74be98774dfbc5b8b795db726bd772e735d2edd4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49223.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}