{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-53057","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-05-02T15:51:43.547Z","datePublished":"2025-05-02T15:55:12.118Z","dateUpdated":"2026-08-05T09:12:34.853Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-05T09:12:34.853Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: HCI: Fix global-out-of-bounds\n\nTo loop a variable-length array, hci_init_stage_sync(stage) considers\nthat stage[i] is valid as long as stage[i-1].func is valid.\nThus, the last element of stage[].func should be intentionally invalid\nas hci_init0[], le_init2[], and others did.\nHowever, amp_init1[] and amp_init2[] have no invalid element, letting\nhci_init_stage_sync() keep accessing amp_init1[] over its valid range.\nThis patch fixes this by adding {} in the last of amp_init1[] and\namp_init2[].\n\n==================================================================\nBUG: KASAN: global-out-of-bounds in hci_dev_open_sync (\n/v6.2-bzimage/net/bluetooth/hci_sync.c:3154\n/v6.2-bzimage/net/bluetooth/hci_sync.c:3343\n/v6.2-bzimage/net/bluetooth/hci_sync.c:4418\n/v6.2-bzimage/net/bluetooth/hci_sync.c:4609\n/v6.2-bzimage/net/bluetooth/hci_sync.c:4689)\nRead of size 8 at addr ffffffffaed1ab70 by task kworker/u5:0/1032\nCPU: 0 PID: 1032 Comm: kworker/u5:0 Not tainted 6.2.0 #3\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04\nWorkqueue: hci1 hci_power_on\nCall Trace:\n <TASK>\ndump_stack_lvl (/v6.2-bzimage/lib/dump_stack.c:107 (discriminator 1))\nprint_report (/v6.2-bzimage/mm/kasan/report.c:307\n  /v6.2-bzimage/mm/kasan/report.c:417)\n? hci_dev_open_sync (/v6.2-bzimage/net/bluetooth/hci_sync.c:3154\n  /v6.2-bzimage/net/bluetooth/hci_sync.c:3343\n  /v6.2-bzimage/net/bluetooth/hci_sync.c:4418\n  /v6.2-bzimage/net/bluetooth/hci_sync.c:4609\n  /v6.2-bzimage/net/bluetooth/hci_sync.c:4689)\nkasan_report (/v6.2-bzimage/mm/kasan/report.c:184\n  /v6.2-bzimage/mm/kasan/report.c:519)\n? hci_dev_open_sync (/v6.2-bzimage/net/bluetooth/hci_sync.c:3154\n  /v6.2-bzimage/net/bluetooth/hci_sync.c:3343\n  /v6.2-bzimage/net/bluetooth/hci_sync.c:4418\n  /v6.2-bzimage/net/bluetooth/hci_sync.c:4609\n  /v6.2-bzimage/net/bluetooth/hci_sync.c:4689)\nhci_dev_open_sync (/v6.2-bzimage/net/bluetooth/hci_sync.c:3154\n  /v6.2-bzimage/net/bluetooth/hci_sync.c:3343\n  /v6.2-bzimage/net/bluetooth/hci_sync.c:4418\n  /v6.2-bzimage/net/bluetooth/hci_sync.c:4609\n  /v6.2-bzimage/net/bluetooth/hci_sync.c:4689)\n? __pfx_hci_dev_open_sync (/v6.2-bzimage/net/bluetooth/hci_sync.c:4635)\n? mutex_lock (/v6.2-bzimage/./arch/x86/include/asm/atomic64_64.h:190\n  /v6.2-bzimage/./include/linux/atomic/atomic-long.h:443\n  /v6.2-bzimage/./include/linux/atomic/atomic-instrumented.h:1781\n  /v6.2-bzimage/kernel/locking/mutex.c:171\n  /v6.2-bzimage/kernel/locking/mutex.c:285)\n? __pfx_mutex_lock (/v6.2-bzimage/kernel/locking/mutex.c:282)\nhci_power_on (/v6.2-bzimage/net/bluetooth/hci_core.c:485\n  /v6.2-bzimage/net/bluetooth/hci_core.c:984)\n? __pfx_hci_power_on (/v6.2-bzimage/net/bluetooth/hci_core.c:969)\n? read_word_at_a_time (/v6.2-bzimage/./include/asm-generic/rwonce.h:85)\n? strscpy (/v6.2-bzimage/./arch/x86/include/asm/word-at-a-time.h:62\n  /v6.2-bzimage/lib/string.c:161)\nprocess_one_work (/v6.2-bzimage/kernel/workqueue.c:2294)\nworker_thread (/v6.2-bzimage/./include/linux/list.h:292\n  /v6.2-bzimage/kernel/workqueue.c:2437)\n? __pfx_worker_thread (/v6.2-bzimage/kernel/workqueue.c:2379)\nkthread (/v6.2-bzimage/kernel/kthread.c:376)\n? __pfx_kthread (/v6.2-bzimage/kernel/kthread.c:331)\nret_from_fork (/v6.2-bzimage/arch/x86/entry/entry_64.S:314)\n </TASK>\nThe buggy address belongs to the variable:\namp_init1+0x30/0x60\nThe buggy address belongs to the physical page:\npage:000000003a157ec6 refcount:1 mapcount:0 mapping:0000000000000000 ia\nflags: 0x200000000001000(reserved|node=0|zone=2)\nraw: 0200000000001000 ffffea0005054688 ffffea0005054688 000000000000000\nraw: 0000000000000000 0000000000000000 00000001ffffffff 000000000000000\npage dumped because: kasan: bad access detected\nMemory state around the buggy address:\n ffffffffaed1aa00: f9 f9 f9 f9 00 00 00 00 f9 f9 f9 f9 00 00 00 00\n ffffffffaed1aa80: 00 00 00 00 f9 f9 f9 f9 00 00 00 00 00 00 00 00\n>ffffffffaed1ab00: 00 f9 f9 f9 f9 f9 f9 f9 00 00 00 00 00 00 f9 f9\n                  \n---truncated---"}],"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 runs during local AMP HCI controller init (hci_register_dev → hci_power_on → hci_init1/2_sync → amp_init*), reachable via HCI UART TTY ioctls (HCI_UART_CREATE_AMP) or HCIDEVUP/vhci—not by processing Bluetooth frames from a remote peer.\nAC:L - Any registration/power-on of an HCI_AMP device deterministically walks the unterminated amp_init tables and invokes out-of-bounds function pointers; the attacker fully controls device creation and open with no race or uncontrollable precondition.\nPR:L - An unprivileged local user who can open a TTY (common dialout/serial access on embedded, automotive, and factory systems) can set N_HCI, HCIUARTSETFLAGS(CREATE_AMP), and HCIUARTSETPROTO to register an AMP device and trigger init without init-namespace CAP_NET_ADMIN.\nUI:N - The attacker performs the TTY/ldisc/ioctl sequence (or plugs an AMP-class device) themselves; hci_register_dev automatically queues power_on with no separate victim action required.\nS:U - Impact is confined to the host kernel Bluetooth HCI init path (OOB read/call within the same OS authority) and does not cross a VM, IOMMU, or sandbox boundary.\nC:H - hci_init_stage_sync performs an unbounded global out-of-bounds read of kernel memory as function pointers until a NULL terminator appears, which exceeds a few-byte bounded leak and meets OOB-read High guidance.\nI:H - Out-of-bounds values are directly called as int (*)(struct hci_dev *), yielding unintended kernel control flow and HCI command execution from adjacent .rodata—scored as High integrity per OOB/control-flow guidance.\nA:H - The demonstrated KASAN global-out-of-bounds (and calling non-pointer adjacent data as a function) produces kernel oops/panic on hardened builds, and init failure/corruption can repeatedly deny AMP Bluetooth bring-up."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/bluetooth/hci_sync.c"],"versions":[{"version":"d0b137062b2de75b264b84143d21c98abc5f5ad2","lessThan":"b3168abd24245aa0775c5a387dcf94d36ca7e738","status":"affected","versionType":"git"},{"version":"d0b137062b2de75b264b84143d21c98abc5f5ad2","lessThan":"8497222b22b591c6b2d106e0e3c1672ffe4e10e0","status":"affected","versionType":"git"},{"version":"d0b137062b2de75b264b84143d21c98abc5f5ad2","lessThan":"bce56405201111807cc8e4f47c6de3e10b17c1ac","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/bluetooth/hci_sync.c"],"versions":[{"version":"5.17","status":"affected"},{"version":"0","lessThan":"5.17","status":"unaffected","versionType":"semver"},{"version":"6.1.22","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.2.9","lessThanOrEqual":"6.2.*","status":"unaffected","versionType":"semver"},{"version":"6.3","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":"5.17","versionEndExcluding":"6.1.22"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"6.2.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"6.3"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/b3168abd24245aa0775c5a387dcf94d36ca7e738"},{"url":"https://git.kernel.org/stable/c/8497222b22b591c6b2d106e0e3c1672ffe4e10e0"},{"url":"https://git.kernel.org/stable/c/bce56405201111807cc8e4f47c6de3e10b17c1ac"}],"title":"Bluetooth: HCI: Fix global-out-of-bounds","x_generator":{"engine":"bippy-1.2.0"}}}}