{"cve":"CVE-2022-49063","nvd":{"published":"2025-02-26T07:00:43.547","modified":"2026-06-17T05:16:58.687","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nice: arfs: fix use-after-free when freeing @rx_cpu_rmap\n\nThe CI testing bots triggered the following splat:\n\n[  718.203054] BUG: KASAN: use-after-free in free_irq_cpu_rmap+0x53/0x80\n[  718.206349] Read of size 4 at addr ffff8881bd127e00 by task sh/20834\n[  718.212852] CPU: 28 PID: 20834 Comm: sh Kdump: loaded Tainted: G S      W IOE     5.17.0-rc8_nextqueue-devqueue-02643-g23f3121aca93 #1\n[  718.219695] Hardware name: Intel Corporation S2600WFT/S2600WFT, BIOS SE5C620.86B.02.01.0012.070720200218 07/07/2020\n[  718.223418] Call Trace:\n[  718.227139]\n[  718.230783]  dump_stack_lvl+0x33/0x42\n[  718.234431]  print_address_description.constprop.9+0x21/0x170\n[  718.238177]  ? free_irq_cpu_rmap+0x53/0x80\n[  718.241885]  ? free_irq_cpu_rmap+0x53/0x80\n[  718.245539]  kasan_report.cold.18+0x7f/0x11b\n[  718.249197]  ? free_irq_cpu_rmap+0x53/0x80\n[  718.252852]  free_irq_cpu_rmap+0x53/0x80\n[  718.256471]  ice_free_cpu_rx_rmap.part.11+0x37/0x50 [ice]\n[  718.260174]  ice_remove_arfs+0x5f/0x70 [ice]\n[  718.263810]  ice_rebuild_arfs+0x3b/0x70 [ice]\n[  718.267419]  ice_rebuild+0x39c/0xb60 [ice]\n[  718.270974]  ? asm_sysvec_apic_timer_interrupt+0x12/0x20\n[  718.274472]  ? ice_init_phy_user_cfg+0x360/0x360 [ice]\n[  718.278033]  ? delay_tsc+0x4a/0xb0\n[  718.281513]  ? preempt_count_sub+0x14/0xc0\n[  718.284984]  ? delay_tsc+0x8f/0xb0\n[  718.288463]  ice_do_reset+0x92/0xf0 [ice]\n[  718.292014]  ice_pci_err_resume+0x91/0xf0 [ice]\n[  718.295561]  pci_reset_function+0x53/0x80\n<...>\n[  718.393035] Allocated by task 690:\n[  718.433497] Freed by task 20834:\n[  718.495688] Last potentially related work creation:\n[  718.568966] The buggy address belongs to the object at ffff8881bd127e00\n                which belongs to the cache kmalloc-96 of size 96\n[  718.574085] The buggy address is located 0 bytes inside of\n                96-byte region [ffff8881bd127e00, ffff8881bd127e60)\n[  718.579265] The buggy address belongs to the page:\n[  718.598905] Memory state around the buggy address:\n[  718.601809]  ffff8881bd127d00: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc\n[  718.604796]  ffff8881bd127d80: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc\n[  718.607794] >ffff8881bd127e00: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc\n[  718.610811]                    ^\n[  718.613819]  ffff8881bd127e80: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc\n[  718.617107]  ffff8881bd127f00: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc\n\nThis is due to that free_irq_cpu_rmap() is always being called\n*after* (devm_)free_irq() and thus it tries to work with IRQ descs\nalready freed. For example, on device reset the driver frees the\nrmap right before allocating a new one (the splat above).\nMake rmap creation and freeing function symmetrical with\n{request,free}_irq() calls i.e. do that on ifup/ifdown instead\nof device probe/remove/resume. These operations can be performed\nindependently from the actual device aRFS configuration.\nAlso, make sure ice_vsi_free_irq() clears IRQ affinity notifiers\nonly when aRFS is disabled -- otherwise, CPU rmap sets and clears\nits own and they must not be touched manually.","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/618df75f2e30c7838a3e010ca32cd4893ec9fe33","https://git.kernel.org/stable/c/ba2f6ec28733fb6b24ed086e676df3df4c138f3f","https://git.kernel.org/stable/c/d08d2fb6d99d82da1c63aba5c0d1c6f237e150f3","https://git.kernel.org/stable/c/d7442f512b71fc63a99c8a801422dde4fbbf9f93","https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"],"products":["debian:debian_linux","linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:59:48.811064707+00:00"},"epss":{"cve":"CVE-2022-49063","score":0.00312,"percentile":0.24139,"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."]}