{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-48878", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-07-16T11:38:08.922Z", "datePublished": "2024-08-21T06:10:09.418Z", "dateUpdated": "2026-08-05T08:52:46.199Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:52:46.199Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_qca: Fix driver shutdown on closed serdev\n\nThe driver shutdown callback (which sends EDL_SOC_RESET to the device\nover serdev) should not be invoked when HCI device is not open (e.g. if\nhci_dev_open_sync() failed), because the serdev and its TTY are not open\neither. Also skip this step if device is powered off\n(qca_power_shutdown()).\n\nThe shutdown callback causes use-after-free during system reboot with\nQualcomm Atheros Bluetooth:\n\n Unable to handle kernel paging request at virtual address\n 0072662f67726fd7\n ...\n CPU: 6 PID: 1 Comm: systemd-shutdow Tainted: G W\n 6.1.0-rt5-00325-g8a5f56bcfcca #8\n Hardware name: Qualcomm Technologies, Inc. Robotics RB5 (DT)\n Call trace:\n tty_driver_flush_buffer+0x4/0x30\n serdev_device_write_flush+0x24/0x34\n qca_serdev_shutdown+0x80/0x130 [hci_uart]\n device_shutdown+0x15c/0x260\n kernel_restart+0x48/0xac\n\nKASAN report:\n\n BUG: KASAN: use-after-free in tty_driver_flush_buffer+0x1c/0x50\n Read of size 8 at addr ffff16270c2e0018 by task systemd-shutdow/1\n\n CPU: 7 PID: 1 Comm: systemd-shutdow Not tainted\n 6.1.0-next-20221220-00014-gb85aaf97fb01-dirty #28\n Hardware name: Qualcomm Technologies, Inc. Robotics RB5 (DT)\n Call trace:\n dump_backtrace.part.0+0xdc/0xf0\n show_stack+0x18/0x30\n dump_stack_lvl+0x68/0x84\n print_report+0x188/0x488\n kasan_report+0xa4/0xf0\n __asan_load8+0x80/0xac\n tty_driver_flush_buffer+0x1c/0x50\n ttyport_write_flush+0x34/0x44\n serdev_device_write_flush+0x48/0x60\n qca_serdev_shutdown+0x124/0x274\n device_shutdown+0x1e8/0x350\n kernel_restart+0x48/0xb0\n __do_sys_reboot+0x244/0x2d0\n __arm64_sys_reboot+0x54/0x70\n invoke_syscall+0x60/0x190\n el0_svc_common.constprop.0+0x7c/0x160\n do_el0_svc+0x44/0xf0\n el0_svc+0x2c/0x6c\n el0t_64_sync_handler+0xbc/0x140\n el0t_64_sync+0x190/0x194" } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The bug is reached through the local reboot/shutdown path (reboot syscall → device_shutdown → qca_serdev_shutdown), not via Bluetooth radio frames or any network protocol.\nAC:L - An attacker can reliably create the vulnerable state (HCI not running / BT powered off on QCA6390 with NON_PERSISTENT_SETUP) and then reboot; no uncontrolled race or rare config is required.\nPR:L - The HCI-closed precondition is common without elevated rights, and on typical desktop/mobile deployments a basic local seat user can initiate reboot (e.g. via polkit/logind) without needing real root in the init user namespace beyond that local account.\nUI:N - The attacker can arrange the BT-off state and initiate reboot themselves; no separate victim action is required.\nS:U - This is a kernel UAF within the host kernel's authority, with no VM escape, IOMMU bypass, or other cross-boundary impact.\nC:H - KASAN confirms a use-after-free of the tty_struct; control of the freed object enables arbitrary kernel read primitives per UAF exploitation.\nI:H - The UAF is on tty->ops before an indirect call to flush_buffer, so heap spray can hijack control flow for arbitrary write/code execution.\nA:H - The demonstrated crash is a kernel oops/paging fault during shutdown (use-after-free), which is a full availability impact." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/bluetooth/hci_qca.c" ], "versions": [ { "version": "7e7bbddd029b644f00f0ffbfbc485ed71977d0d5", "lessThan": "e84ec6e25df9bb0968599e92eacedaf3a0a5b587", "status": "affected", "versionType": "git" }, { "version": "7e7bbddd029b644f00f0ffbfbc485ed71977d0d5", "lessThan": "908d1742b6e694e84ead5c62e4b7c1bfbb8b46a3", "status": "affected", "versionType": "git" }, { "version": "7e7bbddd029b644f00f0ffbfbc485ed71977d0d5", "lessThan": "ea3ebda47dd56f6e1c62f2e0e1b6e1b0a973e447", "status": "affected", "versionType": "git" }, { "version": "7e7bbddd029b644f00f0ffbfbc485ed71977d0d5", "lessThan": "272970be3dabd24cbe50e393ffee8f04aec3b9a8", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/bluetooth/hci_qca.c" ], "versions": [ { "version": "5.8", "status": "affected" }, { "version": "0", "lessThan": "5.8", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.165", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.90", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.8", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "5.10.165" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "5.15.90" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.1.8" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/e84ec6e25df9bb0968599e92eacedaf3a0a5b587" }, { "url": "https://git.kernel.org/stable/c/908d1742b6e694e84ead5c62e4b7c1bfbb8b46a3" }, { "url": "https://git.kernel.org/stable/c/ea3ebda47dd56f6e1c62f2e0e1b6e1b0a973e447" }, { "url": "https://git.kernel.org/stable/c/272970be3dabd24cbe50e393ffee8f04aec3b9a8" } ], "title": "Bluetooth: hci_qca: Fix driver shutdown on closed serdev", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2022-48878", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-09-10T16:05:06.349695Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-12T17:32:53.074Z" } } ] } }