{"cve":"CVE-2022-49082","nvd":{"published":"2025-02-26T07:00:45.540","modified":"2026-06-17T05:17:01.797","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: mpt3sas: Fix use after free in _scsih_expander_node_remove()\n\nThe function mpt3sas_transport_port_remove() called in\n_scsih_expander_node_remove() frees the port field of the sas_expander\nstructure, leading to the following use-after-free splat from KASAN when\nthe ioc_info() call following that function is executed (e.g. when doing\nrmmod of the driver module):\n\n[ 3479.371167] ==================================================================\n[ 3479.378496] BUG: KASAN: use-after-free in _scsih_expander_node_remove+0x710/0x750 [mpt3sas]\n[ 3479.386936] Read of size 1 at addr ffff8881c037691c by task rmmod/1531\n[ 3479.393524]\n[ 3479.395035] CPU: 18 PID: 1531 Comm: rmmod Not tainted 5.17.0-rc8+ #1436\n[ 3479.401712] Hardware name: Supermicro Super Server/H12SSL-NT, BIOS 2.1 06/02/2021\n[ 3479.409263] Call Trace:\n[ 3479.411743]  <TASK>\n[ 3479.413875]  dump_stack_lvl+0x45/0x59\n[ 3479.417582]  print_address_description.constprop.0+0x1f/0x120\n[ 3479.423389]  ? _scsih_expander_node_remove+0x710/0x750 [mpt3sas]\n[ 3479.429469]  kasan_report.cold+0x83/0xdf\n[ 3479.433438]  ? _scsih_expander_node_remove+0x710/0x750 [mpt3sas]\n[ 3479.439514]  _scsih_expander_node_remove+0x710/0x750 [mpt3sas]\n[ 3479.445411]  ? _raw_spin_unlock_irqrestore+0x2d/0x40\n[ 3479.452032]  scsih_remove+0x525/0xc90 [mpt3sas]\n[ 3479.458212]  ? mpt3sas_expander_remove+0x1d0/0x1d0 [mpt3sas]\n[ 3479.465529]  ? down_write+0xde/0x150\n[ 3479.470746]  ? up_write+0x14d/0x460\n[ 3479.475840]  ? kernfs_find_ns+0x137/0x310\n[ 3479.481438]  pci_device_remove+0x65/0x110\n[ 3479.487013]  __device_release_driver+0x316/0x680\n[ 3479.493180]  driver_detach+0x1ec/0x2d0\n[ 3479.498499]  bus_remove_driver+0xe7/0x2d0\n[ 3479.504081]  pci_unregister_driver+0x26/0x250\n[ 3479.510033]  _mpt3sas_exit+0x2b/0x6cf [mpt3sas]\n[ 3479.516144]  __x64_sys_delete_module+0x2fd/0x510\n[ 3479.522315]  ? free_module+0xaa0/0xaa0\n[ 3479.527593]  ? __cond_resched+0x1c/0x90\n[ 3479.532951]  ? lockdep_hardirqs_on_prepare+0x273/0x3e0\n[ 3479.539607]  ? syscall_enter_from_user_mode+0x21/0x70\n[ 3479.546161]  ? trace_hardirqs_on+0x1c/0x110\n[ 3479.551828]  do_syscall_64+0x35/0x80\n[ 3479.556884]  entry_SYSCALL_64_after_hwframe+0x44/0xae\n[ 3479.563402] RIP: 0033:0x7f1fc482483b\n...\n[ 3479.943087] ==================================================================\n\nFix this by introducing the local variable port_id to store the port ID\nvalue before executing mpt3sas_transport_port_remove(). This local variable\nis then used in the call to ioc_info() instead of dereferencing the freed\nport structure.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8},"cwes":["CWE-416"],"references":["https://git.kernel.org/stable/c/17d66b1c92bcb41e72271ec60069d3684aaa1c9c","https://git.kernel.org/stable/c/1bb8a7fc64d63ec818e367e1b37676ea2ef2d20c","https://git.kernel.org/stable/c/25c1353dca74ad7cf3fd7ce258fe7c957a147d5e","https://git.kernel.org/stable/c/87d663d40801dffc99a5ad3b0188ad3e2b4d1557"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:59:48.811064707+00:00"},"epss":{"cve":"CVE-2022-49082","score":0.00252,"percentile":0.16755,"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."]}