{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2022-49910", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-49910", "idYear": 2022, "status": "PUBLISHED", "publishedAt": "2025-05-01T14:10:53.010Z", "updatedAt": "2026-08-05T08:56:39.541Z", "importedAt": "2026-10-24T01:56:49.724Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "Bluetooth: L2CAP: Fix use-after-free caused by l2cap_reassemble_sdu", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: Fix use-after-free caused by l2cap_reassemble_sdu\n\nFix the race condition between the following two flows that run in\nparallel:\n\n1. l2cap_reassemble_sdu -> chan->ops->recv (l2cap_sock_recv_cb) ->\n __sock_queue_rcv_skb.\n\n2. bt_sock_recvmsg -> skb_recv_datagram, skb_free_datagram.\n\nAn SKB can be queued by the first flow and immediately dequeued and\nfreed by the second flow, therefore the callers of l2cap_reassemble_sdu\ncan't use the SKB after that function returns. However, some places\ncontinue accessing struct l2cap_ctrl that resides in the SKB's CB for a\nshort time after l2cap_reassemble_sdu returns, leading to a\nuse-after-free condition (the stack trace is below, line numbers for\nkernel 5.19.8).\n\nFix it by keeping a local copy of struct l2cap_ctrl.\n\nBUG: KASAN: use-after-free in l2cap_rx_state_recv (net/bluetooth/l2cap_core.c:6906) bluetooth\nRead of size 1 at addr ffff88812025f2f0 by task kworker/u17:3/43169\n\nWorkqueue: hci0 hci_rx_work [bluetooth]\nCall Trace:\n \n dump_stack_lvl (lib/dump_stack.c:107 (discriminator 4))\n print_report.cold (mm/kasan/report.c:314 mm/kasan/report.c:429)\n ? l2cap_rx_state_recv (net/bluetooth/l2cap_core.c:6906) bluetooth\n kasan_report (mm/kasan/report.c:162 mm/kasan/report.c:493)\n ? l2cap_rx_state_recv (net/bluetooth/l2cap_core.c:6906) bluetooth\n l2cap_rx_state_recv (net/bluetooth/l2cap_core.c:6906) bluetooth\n l2cap_rx (net/bluetooth/l2cap_core.c:7236 net/bluetooth/l2cap_core.c:7271) bluetooth\n ret_from_fork (arch/x86/entry/entry_64.S:306)\n \n\nAllocated by task 43169:\n kasan_save_stack (mm/kasan/common.c:39)\n __kasan_slab_alloc (mm/kasan/common.c:45 mm/kasan/common.c:436 mm/kasan/common.c:469)\n kmem_cache_alloc_node (mm/slab.h:750 mm/slub.c:3243 mm/slub.c:3293)\n __alloc_skb (net/core/skbuff.c:414)\n l2cap_recv_frag (./include/net/bluetooth/bluetooth.h:425 net/bluetooth/l2cap_core.c:8329) bluetooth\n l2cap_recv_acldata (net/bluetooth/l2cap_core.c:8442) bluetooth\n hci_rx_work (net/bluetooth/hci_core.c:3642 net/bluetooth/hci_core.c:3832) bluetooth\n process_one_work (kernel/workqueue.c:2289)\n worker_thread (./include/linux/list.h:292 kernel/workqueue.c:2437)\n kthread (kernel/kthread.c:376)\n ret_from_fork (arch/x86/entry/entry_64.S:306)\n\nFreed by task 27920:\n kasan_save_stack (mm/kasan/common.c:39)\n kasan_set_track (mm/kasan/common.c:45)\n kasan_set_free_info (mm/kasan/generic.c:372)\n ____kasan_slab_free (mm/kasan/common.c:368 mm/kasan/common.c:328)\n slab_free_freelist_hook (mm/slub.c:1780)\n kmem_cache_free (mm/slub.c:3536 mm/slub.c:3553)\n skb_free_datagram (./include/net/sock.h:1578 ./include/net/sock.h:1639 net/core/datagram.c:323)\n bt_sock_recvmsg (net/bluetooth/af_bluetooth.c:295) bluetooth\n l2cap_sock_recvmsg (net/bluetooth/l2cap_sock.c:1212) bluetooth\n sock_read_iter (net/socket.c:1087)\n new_sync_read (./include/linux/fs.h:2052 fs/read_write.c:401)\n vfs_read (fs/read_write.c:482)\n ksys_read (fs/read_write.c:620)\n do_syscall_64 (arch/x86/entry/common.c:50 arch/x86/entry/common.c:80)\n entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:120)", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "4b51dae96731c9d82f5634e75ac7ffd3b9c1b060", "status": "affected", "versionType": "git", "lessThan": "dc30e05bb18852303084430c03ca76e69257d9ea" }, { "version": "4b51dae96731c9d82f5634e75ac7ffd3b9c1b060", "status": "affected", "versionType": "git", "lessThan": "03af22e23b96fb7ef75fb7885407ef457e8b403d" }, { "version": "4b51dae96731c9d82f5634e75ac7ffd3b9c1b060", "status": "affected", "versionType": "git", "lessThan": "6c7407bfbeafc80a04e6eaedcf34d378532a04f2" }, { "version": "4b51dae96731c9d82f5634e75ac7ffd3b9c1b060", "status": "affected", "versionType": "git", "lessThan": "4cd094fd5d872862ca278e15b9b51b07e915ef3f" }, { "version": "4b51dae96731c9d82f5634e75ac7ffd3b9c1b060", "status": "affected", "versionType": "git", "lessThan": "cb1c012099ef5904cd468bdb8d6fcdfdd9bcb569" }, { "version": "4b51dae96731c9d82f5634e75ac7ffd3b9c1b060", "status": "affected", "versionType": "git", "lessThan": "8278a87bb1eeea94350d675ef961ee5a03341fde" }, { "version": "4b51dae96731c9d82f5634e75ac7ffd3b9c1b060", "status": "affected", "versionType": "git", "lessThan": "9a04161244603f502c6e453913e51edd59cb70c1" }, { "version": "4b51dae96731c9d82f5634e75ac7ffd3b9c1b060", "status": "affected", "versionType": "git", "lessThan": "3aff8aaca4e36dc8b17eaa011684881a80238966" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "3.6", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "3.6" }, { "version": "4.9.333", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.9.*" }, { "version": "4.14.299", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.14.*" }, { "version": "4.19.265", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.19.*" }, { "version": "5.4.224", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.154", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.78", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.0.8", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.0.*" }, { "version": "6.1", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }