{"id":"CVE-2026-53253","revision":"ee10868698b542a98044d7eb91f914ee","records":[{"revision":"ee10868698b542a98044d7eb91f914ee","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-53253","aliases":[],"title":"Bluetooth: bnep: reject short frames before parsing","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: bnep: reject short frames before parsing\n\nA BNEP peer can send a short BNEP SDU. bnep_rx_frame() reads the\npacket type byte immediately and, for control packets, reads the control\nopcode and setup UUID-size byte before proving that those bytes are\npresent. bnep_rx_control() also dereferences the control opcode without\nrejecting an empty control payload.\n\nUse skb_pull_data() for the fixed fields in bnep_rx_frame() so a NULL\nreturn gates each dereference. Split the control handler so the frame\npath can pass an opcode that has already been pulled, and keep the\nbyte-buffer wrapper for extension control payloads.\n\nFor BNEP_SETUP_CONN_REQ, name the UUID-size byte before pulling the\nsetup payload. struct bnep_setup_conn_req carries destination and source\nservice UUIDs after that byte, each uuid_size bytes, so the parser now\ndocuments that tuple explicitly instead of leaving the pull length as an\nopaque multiplication.\n\nValidation reproduced this kernel report:\nKASAN slab-out-of-bounds in bnep_rx_frame.isra.0+0x130c/0x1790\nThe buggy address belongs to the object at ffff88800c0f7908 which belongs\nto the cache kmalloc-8 of size 8\nThe buggy address is located 0 bytes to the right of allocated 1-byte\nregion [ffff88800c0f7908, ffff88800c0f7909)\nRead of size 1\nCall trace:\n  dump_stack_lvl+0xb3/0x140 (?:?)\n  print_address_description+0x57/0x3a0 (?:?)\n  bnep_rx_frame+0x130c/0x1790 (net/bluetooth/bnep/core.c:306)\n  print_report+0xb9/0x2b0 (?:?)\n  __virt_addr_valid+0x1ba/0x3a0 (?:?)\n  srso_alias_return_thunk+0x5/0xfbef5 (?:?)\n  kasan_addr_to_slab+0x21/0x60 (?:?)\n  kasan_report+0xe0/0x110 (?:?)\n  process_one_work+0xfce/0x17e0 (kernel/workqueue.c:3200)\n  worker_thread+0x65c/0xe40 (?:?)\n  __kthread_parkme+0x184/0x230 (?:?)\n  kthread+0x35e/0x470 (?:?)\n  _raw_spin_unlock_irq+0x28/0x50 (?:?)\n  ret_from_fork+0x586/0x870 (?:?)\n  __switch_to+0x74f/0xdc0 (?:?)\n  ret_from_fork_asm+0x1a/0x30 (?:?)","state":0,"publishedAt":"2026-06-25T08:39:44.612+00:00","modifiedAt":"2026-10-19T19:57:31.739+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/bluetooth/bnep/core.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\n                            \"lessThan\": \"0ef2ea86c82b2615902d085cd5a586fe9f58994f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\n                            \"lessThan\": \"2b83afb19293e4de700edae306115f18966dc4f9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\n                            \"lessThan\": \"691f14b6a48b637655755134f1e551c7c6fedc2e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\n                            \"lessThan\": \"d76dec1a37122bc16d83d059c08c0512ea8de909\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\n                            \"lessThan\": \"c893e17d2809ec9c4b3f1cdd5847cecbc27a311b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\n                            \"lessThan\": \"be837cd09897e9e6e1958174501d467bdcbcc2bc\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\n                            \"lessThan\": \"6770d3a8acdf9151769180cc3710346c4cfbe6f0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/bluetooth/bnep/core.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"2.6.12\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"2.6.12\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.210\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.176\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.143\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.94\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.36\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0.13\",\n                            \"lessThanOrEqual\": \"7.0.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","score":7.1,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/0ef2ea86c82b2615902d085cd5a586fe9f58994f","https://git.kernel.org/stable/c/2b83afb19293e4de700edae306115f18966dc4f9","https://git.kernel.org/stable/c/691f14b6a48b637655755134f1e551c7c6fedc2e","https://git.kernel.org/stable/c/d76dec1a37122bc16d83d059c08c0512ea8de909","https://git.kernel.org/stable/c/c893e17d2809ec9c4b3f1cdd5847cecbc27a311b","https://git.kernel.org/stable/c/be837cd09897e9e6e1958174501d467bdcbcc2bc","https://git.kernel.org/stable/c/6770d3a8acdf9151769180cc3710346c4cfbe6f0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-53253","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-53253","identifiers":["CVE-2026-53253"]},"retained":false,"historicalAffected":[]}],"coverage":[]}