{ "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-2026-23150", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-23150", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-02-14T16:01:18.968Z", "updatedAt": "2026-05-11T22:01:10.727Z", "importedAt": "2026-10-24T01:58:02.025Z", "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": "nfc: llcp: Fix memleak in nfc_llcp_send_ui_frame().", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: llcp: Fix memleak in nfc_llcp_send_ui_frame().\n\nsyzbot reported various memory leaks related to NFC, struct\nnfc_llcp_sock, sk_buff, nfc_dev, etc. [0]\n\nThe leading log hinted that nfc_llcp_send_ui_frame() failed\nto allocate skb due to sock_error(sk) being -ENXIO.\n\nENXIO is set by nfc_llcp_socket_release() when struct\nnfc_llcp_local is destroyed by local_cleanup().\n\nThe problem is that there is no synchronisation between\nnfc_llcp_send_ui_frame() and local_cleanup(), and skb\ncould be put into local->tx_queue after it was purged in\nlocal_cleanup():\n\n CPU1 CPU2\n ---- ----\n nfc_llcp_send_ui_frame() local_cleanup()\n |- do { '\n |- pdu = nfc_alloc_send_skb(..., &err)\n | .\n | |- nfc_llcp_socket_release(local, false, ENXIO);\n | |- skb_queue_purge(&local->tx_queue); |\n | ' |\n |- skb_queue_tail(&local->tx_queue, pdu); |\n ... |\n |- pdu = nfc_alloc_send_skb(..., &err) |\n ^._________________________________.'\n\nlocal_cleanup() is called for struct nfc_llcp_local only\nafter nfc_llcp_remove_local() unlinks it from llcp_devices.\n\nIf we hold local->tx_queue.lock then, we can synchronise\nthe thread and nfc_llcp_send_ui_frame().\n\nLet's do that and check list_empty(&local->list) before\nqueuing skb to local->tx_queue in nfc_llcp_send_ui_frame().\n\n[0]:\n[ 56.074943][ T6096] llcp: nfc_llcp_send_ui_frame: Could not allocate PDU (error=-6)\n[ 64.318868][ T5813] kmemleak: 6 new suspected memory leaks (see /sys/kernel/debug/kmemleak)\nBUG: memory leak\nunreferenced object 0xffff8881272f6800 (size 1024):\n comm \"syz.0.17\", pid 6096, jiffies 4294942766\n hex dump (first 32 bytes):\n 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\n 27 00 03 40 00 00 00 00 00 00 00 00 00 00 00 00 '..@............\n backtrace (crc da58d84d):\n kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]\n slab_post_alloc_hook mm/slub.c:4979 [inline]\n slab_alloc_node mm/slub.c:5284 [inline]\n __do_kmalloc_node mm/slub.c:5645 [inline]\n __kmalloc_noprof+0x3e3/0x6b0 mm/slub.c:5658\n kmalloc_noprof include/linux/slab.h:961 [inline]\n sk_prot_alloc+0x11a/0x1b0 net/core/sock.c:2239\n sk_alloc+0x36/0x360 net/core/sock.c:2295\n nfc_llcp_sock_alloc+0x37/0x130 net/nfc/llcp_sock.c:979\n llcp_sock_create+0x71/0xd0 net/nfc/llcp_sock.c:1044\n nfc_sock_create+0xc9/0xf0 net/nfc/af_nfc.c:31\n __sock_create+0x1a9/0x340 net/socket.c:1605\n sock_create net/socket.c:1663 [inline]\n __sys_socket_create net/socket.c:1700 [inline]\n __sys_socket+0xb9/0x1a0 net/socket.c:1747\n __do_sys_socket net/socket.c:1761 [inline]\n __se_sys_socket net/socket.c:1759 [inline]\n __x64_sys_socket+0x1b/0x30 net/socket.c:1759\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0xa4/0xfa0 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nBUG: memory leak\nunreferenced object 0xffff88810fbd9800 (size 240):\n comm \"syz.0.17\", pid 6096, jiffies 4294942850\n hex dump (first 32 bytes):\n 68 f0 ff 08 81 88 ff ff 68 f0 ff 08 81 88 ff ff h.......h.......\n 00 00 00 00 00 00 00 00 00 68 2f 27 81 88 ff ff .........h/'....\n backtrace (crc 6cc652b1):\n kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]\n slab_post_alloc_hook mm/slub.c:4979 [inline]\n slab_alloc_node mm/slub.c:5284 [inline]\n kmem_cache_alloc_node_noprof+0x36f/0x5e0 mm/slub.c:5336\n __alloc_skb+0x203/0x240 net/core/skbuff.c:660\n alloc_skb include/linux/skbuff.h:1383 [inline]\n alloc_skb_with_frags+0x69/0x3f0 net/core/sk\n---truncated---", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "94f418a206648c9be6fd84d6681d6956b8f8b106", "status": "affected", "versionType": "git", "lessThan": "ab660cb8e17aa93426d1e821c2cce60e4b9bc56a" }, { "version": "94f418a206648c9be6fd84d6681d6956b8f8b106", "status": "affected", "versionType": "git", "lessThan": "65e976e1f474ae3bf5681d7abafb8f3fdb34b8cc" }, { "version": "94f418a206648c9be6fd84d6681d6956b8f8b106", "status": "affected", "versionType": "git", "lessThan": "6734ff1ac6beba1d0c22dc9a3dc1849b773b511f" }, { "version": "94f418a206648c9be6fd84d6681d6956b8f8b106", "status": "affected", "versionType": "git", "lessThan": "f8d002626d434f5fea9085e2557711c16a15cec6" }, { "version": "94f418a206648c9be6fd84d6681d6956b8f8b106", "status": "affected", "versionType": "git", "lessThan": "3098e5c8af0f4c8f7eebbb370798df8aa2e12ba5" }, { "version": "94f418a206648c9be6fd84d6681d6956b8f8b106", "status": "affected", "versionType": "git", "lessThan": "61858cbce6ca4bef9ed116c689a4be9520841339" }, { "version": "94f418a206648c9be6fd84d6681d6956b8f8b106", "status": "affected", "versionType": "git", "lessThan": "165c34fb6068ff153e3fc99a932a80a9d5755709" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "3.8", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "3.8" }, { "version": "5.10.249", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.199", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.162", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.123", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.69", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.9", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "6.19", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }