{ "cveId": "CVE-2022-49505", "url": "https://patchblox.com/security/cve/CVE-2022-49505", "summary": "CVE-2022-49505 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49505, released February 26, 2025. It is not reported as exploited. Patch Radar priority: High.", "title": "linux: In the Linux kernel, the following vulnerability has been resolved: NFC: NULL out the dev-\u003Erfkill to prevent UAF Co...", "description": "In the Linux kernel, the following vulnerability has been resolved: NFC: NULL out the dev-\u003Erfkill to prevent UAF Commit 3e3b5dfcd16a (\u0022NFC: reorder the logic in nfc_{un,}register_device\u0022) assumes the device_is_registered() in function nfc_dev_up() will help to check when the rfkill is unregistered. However, this check only take effect when device_del(\u0026dev-\u003Edev) is done in nfc_unregister_device(). Hence, the rfkill object is still possible be dereferenced. The crash trace in latest kernel (5.18-rc2): [ 68.760105] ================================================================== [ 68.760330] BUG: KASAN: use-after-free in __lock_acquire\u002B0x3ec1/0x6750 [ 68.760756] Read of size 8 at addr ffff888009c93018 by task fuzz/313 [ 68.760756] [ 68.760756] CPU: 0 PID: 313 Comm: fuzz Not tainted 5.18.0-rc2 #4 [ 68.760756] Hardware name: QEMU Standard PC (i440FX \u002B PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 [ 68.760756] Call Trace: [ 68.760756] \u003CTASK\u003E [ 68.760756] dump_stack_lvl\u002B0x57/0x7d [ 68.760756] print_report.cold\u002B0x5e/0x5db [ 68.760756] ? __lock_acquire\u002B0x3ec1/0x6750 [ 68.760756] kasan_report\u002B0xbe/0x1c0 [ 68.760756] ? __lock_acquire\u002B0x3ec1/0x6750 [ 68.760756] __lock_acquire\u002B0x3ec1/0x6750 [ 68.760756] ? lockdep_hardirqs_on_prepare\u002B0x410/0x410 [ 68.760756] ? register_lock_class\u002B0x18d0/0x18d0 [ 68.760756] lock_acquire\u002B0x1ac/0x4f0 [ 68.760756] ? rfkill_blocked\u002B0xe/0x60 [ 68.760756] ? lockdep_hardirqs_on_prepare\u002B0x410/0x410 [ 68.760756] ? mutex_lock_io_nested\u002B0x12c0/0x12c0 [ 68.760756] ? nla_get_range_signed\u002B0x540/0x540 [ 68.760756] ? _raw_spin_lock_irqsave\u002B0x4e/0x50 [ 68.760756] _raw_spin_lock_irqsave\u002B0x39/0x50 [ 68.760756] ? rfkill_blocked\u002B0xe/0x60 [ 68.760756] rfkill_blocked\u002B0xe/0x60 [ 68.760756] nfc_dev_up\u002B0x84/0x260 [ 68.760756] nfc_genl_dev_up\u002B0x90/0xe0 [ 68.760756] genl_family_rcv_msg_doit\u002B0x1f4/0x2f0 [ 68.760756] ? genl_family_rcv_msg_attrs_parse.constprop.0\u002B0x230/0x230 [ 68.760756] ? security_capable\u002B0x51/0x90 [ 68.760756] genl_rcv_msg\u002B0x280/0x500 [ 68.760756] ? genl_get_cmd\u002B0x3c0/0x3c0 [ 68.760756] ? lock_acquire\u002B0x1ac/0x4f0 [ 68.760756] ? nfc_genl_dev_down\u002B0xe0/0xe0 [ 68.760756] ? lockdep_hardirqs_on_prepare\u002B0x410/0x410 [ 68.760756] netlink_rcv_skb\u002B0x11b/0x340 [ 68.760756] ? genl_get_cmd\u002B0x3c0/0x3c0 [ 68.760756] ? netlink_ack\u002B0x9c0/0x9c0 [ 68.760756] ? netlink_deliver_tap\u002B0x136/0xb00 [ 68.760756] genl_rcv\u002B0x1f/0x30 [ 68.760756] netlink_unicast\u002B0x430/0x710 [ 68.760756] ? memset\u002B0x20/0x40 [ 68.760756] ? netlink_attachskb\u002B0x740/0x740 [ 68.760756] ? __build_skb_around\u002B0x1f4/0x2a0 [ 68.760756] netlink_sendmsg\u002B0x75d/0xc00 [ 68.760756] ? netlink_unicast\u002B0x710/0x710 [ 68.760756] ? netlink_unicast\u002B0x710/0x710 [ 68.760756] sock_sendmsg\u002B0xdf/0x110 [ 68.760756] __sys_sendto\u002B0x19e/0x270 [ 68.760756] ? __ia32_sys_getpeername\u002B0xa0/0xa0 [ 68.760756] ? fd_install\u002B0x178/0x4c0 [ 68.760756] ? fd_install\u002B0x195/0x4c0 [ 68.760756] ? kernel_fpu_begin_mask\u002B0x1c0/0x1c0 [ 68.760756] __x64_sys_sendto\u002B0xd8/0x1b0 [ 68.760756] ? lockdep_hardirqs_on\u002B0xbf/0x130 [ 68.760756] ? syscall_enter_from_user_mode\u002B0x1d/0x50 [ 68.760756] do_syscall_64\u002B0x3b/0x90 [ 68.760756] entry_SYSCALL_64_after_hwframe\u002B0x44/0xae [ 68.760756] RIP: 0033:0x7f67fb50e6b3 ... [ 68.760756] RSP: 002b:00007f67fa91fe90 EFLAGS: 00000293 ORIG_RAX: 000000000000002c [ 68.760756] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f67fb50e6b3 [ 68.760756] RDX: 000000000000001c RSI: 0000559354603090 RDI: 0000000000000003 [ 68.760756] RBP: 00007f67fa91ff00 R08: 00007f67fa91fedc R09: 000000000000000c [ 68.760756] R10: 0000000000000000 R11: 0000000000000293 R12: 00007ffe824d496e [ 68.760756] R13: 00007ffe824d496f R14: 00007f67fa120000 R15: 0000000000000003 [ 68.760756] \u003C/TASK\u003E [ 68.760756] [ 68.760756] Allocated by task 279: [ 68.760756] kasan_save_stack\u002B0x1e/0x40 [ ---truncated---", "published": "2025-02-26T07:01:26Z", "severity": "high", "cvss": 7.8, "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "epss": 0.00283, "epssPercentile": 0.20994, "priority": "High", "priorityTier": 3, "exploited": false, "vendorExploited": false, "disclosed": false, "fixes": [ { "platform": "linux", "product": "linux", "release": "Debian 12.15 (bookworm)", "fixedVersion": "5.18.5-1", "fix": "DEBIAN-CVE-2022-49505", "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-49505", "released": "2025-02-26T07:01:26Z" }, { "platform": "linux", "product": "linux", "release": "Debian 13.5 (trixie)", "fixedVersion": "5.18.5-1", "fix": "DEBIAN-CVE-2022-49505", "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-49505", "released": "2025-02-26T07:01:26Z" }, { "platform": "linux", "product": "linux", "release": "Debian 14", "fixedVersion": "5.18.5-1", "fix": "DEBIAN-CVE-2022-49505", "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-49505", "released": "2025-02-26T07:01:26Z" } ], "noFixYet": [], "dataAsOf": "2026-11-08T19:12:23Z", "attribution": { "text": "Data: Patchblox Patch Radar", "url": "https://patchblox.com/security/patch-radar", "terms": "https://patchblox.com/security/patch-radar/use-the-data" } }