{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-49111", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-02-26T01:49:39.261Z", "datePublished": "2025-02-26T01:54:56.622Z", "dateUpdated": "2026-08-05T08:53:57.294Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:53:57.294Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: Fix use after free in hci_send_acl\n\nThis fixes the following trace caused by receiving\nHCI_EV_DISCONN_PHY_LINK_COMPLETE which does call hci_conn_del without\nfirst checking if conn->type is in fact AMP_LINK and in case it is\ndo properly cleanup upper layers with hci_disconn_cfm:\n\n ==================================================================\n BUG: KASAN: use-after-free in hci_send_acl+0xaba/0xc50\n Read of size 8 at addr ffff88800e404818 by task bluetoothd/142\n\n CPU: 0 PID: 142 Comm: bluetoothd Not tainted\n 5.17.0-rc5-00006-gda4022eeac1a #7\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS\n rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014\n Call Trace:\n \n dump_stack_lvl+0x45/0x59\n print_address_description.constprop.0+0x1f/0x150\n kasan_report.cold+0x7f/0x11b\n hci_send_acl+0xaba/0xc50\n l2cap_do_send+0x23f/0x3d0\n l2cap_chan_send+0xc06/0x2cc0\n l2cap_sock_sendmsg+0x201/0x2b0\n sock_sendmsg+0xdc/0x110\n sock_write_iter+0x20f/0x370\n do_iter_readv_writev+0x343/0x690\n do_iter_write+0x132/0x640\n vfs_writev+0x198/0x570\n do_writev+0x202/0x280\n do_syscall_64+0x38/0x90\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n RSP: 002b:00007ffce8a099b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000014\n Code: 0f 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b8 0f 1f 00 f3\n 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 14 00 00 00 0f 05\n <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10\n RDX: 0000000000000001 RSI: 00007ffce8a099e0 RDI: 0000000000000015\n RAX: ffffffffffffffda RBX: 00007ffce8a099e0 RCX: 00007f788fc3cf77\n R10: 00007ffce8af7080 R11: 0000000000000246 R12: 000055e4ccf75580\n RBP: 0000000000000015 R08: 0000000000000002 R09: 0000000000000001\n \n R13: 000055e4ccf754a0 R14: 000055e4ccf75cd0 R15: 000055e4ccf4a6b0\n\n Allocated by task 45:\n kasan_save_stack+0x1e/0x40\n __kasan_kmalloc+0x81/0xa0\n hci_chan_create+0x9a/0x2f0\n l2cap_conn_add.part.0+0x1a/0xdc0\n l2cap_connect_cfm+0x236/0x1000\n le_conn_complete_evt+0x15a7/0x1db0\n hci_le_conn_complete_evt+0x226/0x2c0\n hci_le_meta_evt+0x247/0x450\n hci_event_packet+0x61b/0xe90\n hci_rx_work+0x4d5/0xc50\n process_one_work+0x8fb/0x15a0\n worker_thread+0x576/0x1240\n kthread+0x29d/0x340\n ret_from_fork+0x1f/0x30\n\n Freed by task 45:\n kasan_save_stack+0x1e/0x40\n kasan_set_track+0x21/0x30\n kasan_set_free_info+0x20/0x30\n __kasan_slab_free+0xfb/0x130\n kfree+0xac/0x350\n hci_conn_cleanup+0x101/0x6a0\n hci_conn_del+0x27e/0x6c0\n hci_disconn_phylink_complete_evt+0xe0/0x120\n hci_event_packet+0x812/0xe90\n hci_rx_work+0x4d5/0xc50\n process_one_work+0x8fb/0x15a0\n worker_thread+0x576/0x1240\n kthread+0x29d/0x340\n ret_from_fork+0x1f/0x30\n\n The buggy address belongs to the object at ffff88800c0f0500\n The buggy address is located 24 bytes inside of\n which belongs to the cache kmalloc-128 of size 128\n The buggy address belongs to the page:\n 128-byte region [ffff88800c0f0500, ffff88800c0f0580)\n flags: 0x100000000000200(slab|node=0|zone=1)\n page:00000000fe45cd86 refcount:1 mapcount:0\n mapping:0000000000000000 index:0x0 pfn:0xc0f0\n raw: 0000000000000000 0000000080100010 00000001ffffffff\n 0000000000000000\n raw: 0100000000000200 ffffea00003a2c80 dead000000000004\n ffff8880078418c0\n page dumped because: kasan: bad access detected\n ffff88800c0f0400: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc\n Memory state around the buggy address:\n >ffff88800c0f0500: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n ffff88800c0f0480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc\n ffff88800c0f0580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc\n \n---truncated---" } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:A - The vulnerability is in the Bluetooth HCI event path (hci_disconn_phylink_complete_evt), reachable from an adjacent Bluetooth peer/controller that induces HCI_EV_DISCONN_PHY_LINK_COMPLETE, matching kernel guidance that Bluetooth bugs are Adjacent.\nAC:L - The attacker can reliably trigger the bug by causing a DISCONN_PHY_LINK_COMPLETE event whose phy_handle matches an existing non-AMP connection handle; no uncontrolled race or special victim state is required beyond an active L2CAP/LE connection.\nPR:N - Exploitation does not require local privileges on the victim; an unauthenticated adjacent Bluetooth attacker can drive the HCI event path that frees the connection object, consistent with other Bluetooth HCI UAF scores.\nUI:N - No user interaction is required; once Bluetooth is up and a connection exists, the malicious HCI disconnect event and subsequent send path trigger the UAF without victim action.\nS:U - Impact is confined to the local kernel Bluetooth stack (memory corruption/privilege escalation within the same OS authority), with no VM escape or other security-authority boundary crossed.\nC:H - This is a heap use-after-free of hci_chan; per guidance UAFs enable control of freed object contents and arbitrary read primitives, so confidentiality impact is High.\nI:H - The same UAF of hci_chan used by hci_send_acl enables heap spraying and write/control-flow hijacking primitives, so integrity impact is High.\nA:H - The demonstrated KASAN use-after-free causes kernel oops/crash on the send path, and UAFs are scored High for availability even when not fully exploited." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/bluetooth/hci_event.c" ], "versions": [ { "version": "9eef6b3a9e38d5f8ad315b2a7db153392e6a77d6", "lessThan": "c41de54b0a963e59e4dd04c029a4a6d73f45ef9c", "status": "affected", "versionType": "git" }, { "version": "9eef6b3a9e38d5f8ad315b2a7db153392e6a77d6", "lessThan": "643a6c26bd32e339d00ad97b8822b6db009e803c", "status": "affected", "versionType": "git" }, { "version": "9eef6b3a9e38d5f8ad315b2a7db153392e6a77d6", "lessThan": "684e505406abaeabe0058e9776f9210bf2747953", "status": "affected", "versionType": "git" }, { "version": "9eef6b3a9e38d5f8ad315b2a7db153392e6a77d6", "lessThan": "3803d896ddd97c7c16689a5381c0960040727647", "status": "affected", "versionType": "git" }, { "version": "9eef6b3a9e38d5f8ad315b2a7db153392e6a77d6", "lessThan": "2cc803804ec9a296b3156855d6c8c4ca1c6b84be", "status": "affected", "versionType": "git" }, { "version": "9eef6b3a9e38d5f8ad315b2a7db153392e6a77d6", "lessThan": "d404765dffdbd8dcd14758695d0c96c52fb2e624", "status": "affected", "versionType": "git" }, { "version": "9eef6b3a9e38d5f8ad315b2a7db153392e6a77d6", "lessThan": "4da302b90b96c309987eb9b37c8547f939f042d2", "status": "affected", "versionType": "git" }, { "version": "9eef6b3a9e38d5f8ad315b2a7db153392e6a77d6", "lessThan": "b3c2ea1fd444b3bb7b82bfd2c3a45418f85c2502", "status": "affected", "versionType": "git" }, { "version": "9eef6b3a9e38d5f8ad315b2a7db153392e6a77d6", "lessThan": "f63d24baff787e13b723d86fe036f84bdbc35045", "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_event.c" ], "versions": [ { "version": "3.8", "status": "affected" }, { "version": "0", "lessThan": "3.8", "status": "unaffected", "versionType": "semver" }, { "version": "4.9.311", "lessThanOrEqual": "4.9.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.14.276", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.238", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.189", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.111", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.34", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.16.20", "lessThanOrEqual": "5.16.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.17.3", "lessThanOrEqual": "5.17.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.18", "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": "3.8", "versionEndExcluding": "4.9.311" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "4.14.276" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "4.19.238" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "5.4.189" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "5.10.111" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "5.15.34" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "5.16.20" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "5.17.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "5.18" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/c41de54b0a963e59e4dd04c029a4a6d73f45ef9c" }, { "url": "https://git.kernel.org/stable/c/643a6c26bd32e339d00ad97b8822b6db009e803c" }, { "url": "https://git.kernel.org/stable/c/684e505406abaeabe0058e9776f9210bf2747953" }, { "url": "https://git.kernel.org/stable/c/3803d896ddd97c7c16689a5381c0960040727647" }, { "url": "https://git.kernel.org/stable/c/2cc803804ec9a296b3156855d6c8c4ca1c6b84be" }, { "url": "https://git.kernel.org/stable/c/d404765dffdbd8dcd14758695d0c96c52fb2e624" }, { "url": "https://git.kernel.org/stable/c/4da302b90b96c309987eb9b37c8547f939f042d2" }, { "url": "https://git.kernel.org/stable/c/b3c2ea1fd444b3bb7b82bfd2c3a45418f85c2502" }, { "url": "https://git.kernel.org/stable/c/f63d24baff787e13b723d86fe036f84bdbc35045" } ], "title": "Bluetooth: Fix use after free in hci_send_acl", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2022-49111", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2025-02-27T18:17:22.265818Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-02-27T18:22:35.037Z" } } ] } }