{ "schema_version": "1.6.1", "id": "RPI-CVE-2024-35967", "modified": "2026-10-09T11:39:44Z", "upstream": [ "CVE-2024-35967" ], "published": "2024-05-20T09:42:41Z", "summary": "Bluetooth: SCO: Fix not validating setsockopt user input", "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: SCO: Fix not validating setsockopt user input\n\nsyzbot reported sco_sock_setsockopt() is copying data without\nchecking user input length.\n\nBUG: KASAN: slab-out-of-bounds in copy_from_sockptr_offset\ninclude/linux/sockptr.h:49 [inline]\nBUG: KASAN: slab-out-of-bounds in copy_from_sockptr\ninclude/linux/sockptr.h:55 [inline]\nBUG: KASAN: slab-out-of-bounds in sco_sock_setsockopt+0xc0b/0xf90\nnet/bluetooth/sco.c:893\nRead of size 4 at addr ffff88805f7b15a3 by task syz-executor.5/12578", "severity": [ { "type": "CVSS_V3", "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H" } ], "affected": [ { "package": { "ecosystem": "Raspberry Pi OS:12", "name": "linux" }, 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"upstream_modified": "2026-08-05T11:52:36Z", "severity": { "source": "kernel CNA", "cvss_v3_score": 7.1, "cvss_v3_severity": "High", "scenario": "AV:L - The flaw is triggered purely through the setsockopt(2) syscall on a locally created AF_BLUETOOTH/BTPROTO_SCO socket; no Bluetooth radio traffic, paired peer, or adapter link is involved in reaching the unvalidated copy.\nAC:L - Exploitation is fully deterministic and attacker-controlled \u2014 issue setsockopt(fd, SOL_BLUETOOTH, BT_PKT_STATUS/BT_DEFER_SETUP, buf, optlen<4); no race, no timing window, and no memory-layout condition outside the attacker's influence.\nPR:L - sco_sock_create() and bt_sock_create() contain no capability check (unlike HCI raw sockets), so any unprivileged local user can open a SCO socket and call setsockopt; only the permissive security_socket_setsockopt() LSM hook sits on the path.\nUI:N - The attacker performs every step itself via its own socket; no victim action, mount, or file open is needed.\nS:U - The out-of-bounds access occurs in kernel slab memory within the same security authority; there is no VM, IOMMU, or sandbox boundary crossed.\nC:H - The bug is an out-of-bounds read of kernel heap memory past the end of the optval allocation, and the disclosed value is observable back in userspace because sco_sock_getsockopt() returns the BT_SK_DEFER_SETUP/BT_SK_PKT_STATUS bits, giving a repeatable oracle over adjacent kernel memory that can be combined with heap grooming to leak kernel data.\nI:N - The defect is a read past the end of a buffer; nothing is written out of bounds, and the leaked value only toggles a flag on the attacker's own socket, so no data outside the attacker's authority is modified.\nA:H - The slab out-of-bounds read triggers a KASAN BUG/panic on hardened and debug kernels and can fault when the copy crosses into an unmapped or guarded page, producing a kernel oops repeatable at will by an unprivileged user." } } }