364 lines
18 KiB
JSON
364 lines
18 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-64406",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-07-19T15:36:31.786Z",
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"datePublished": "2026-07-25T08:50:47.978Z",
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"dateUpdated": "2026-10-19T20:38:27.281Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-17T04:55:04.583Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: fix UAF in bt_accept_dequeue()\n\nbt_accept_get() takes a temporary reference before dropping the accept\nqueue lock. bt_accept_dequeue() currently drops that reference before\nbt_accept_unlink(), leaving only the queue reference.\n\nbt_accept_unlink() drops the queue reference. The subsequent\nsock_hold() therefore accesses freed memory if it was the final\nreference, as observed by KASAN during listening L2CAP socket cleanup.\n\nRetain the temporary queue-walk reference through unlink and hand it to\nthe caller on success. Drop it explicitly on the closed and\nnot-yet-connected paths."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:A - The vulnerable child is created through an incoming Bluetooth link, with its teardown driven by connection and disconnection events from a nearby peer. Bluetooth radio reachability is adjacent rather than routable network access.\nAC:L - The attacker can control listener cleanup and use an adjacent peer to connect and disconnect before the fixed channel becomes ready, producing the final queue-only reference state. The trigger is repeatable and Bluetooth BR/EDR support is a common default configuration.\nPR:L - Unprivileged SOCK_STREAM or SOCK_SEQPACKET L2CAP sockets and dynamic or fixed-CID binds require no capability; only raw sockets and reserved PSM binds are privileged. Although AF_BLUETOOTH requires init_net, an ordinary host user or user namespace without a new network namespace can reach it.\nUI:N - The attacker can close their own listener while controlling the peer connection lifecycle, requiring no action from another user.\nS:U - Exploitation compromises the vulnerable host kernel but does not inherently cross a VM, IOMMU, or other security-authority boundary.\nC:H - The freed struct sock comes from the general kmalloc-2k cache and can be reclaimed with attacker-controlled data. Subsequent socket and channel dereferences can be developed into arbitrary kernel-memory disclosure.\nI:H - The UAF causes an atomic write to freed memory followed by further operations on the freed socket and channel, enabling heap-spray-based corruption and potential control-flow hijacking.\nA:H - The confirmed post-free write can cause a kernel oops or panic, and the attacker can repeat the connection, disconnection, and cleanup sequence."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/bluetooth/af_bluetooth.c",
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"net/bluetooth/l2cap_sock.c"
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],
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"versions": [
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{
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"version": "751de6ec671fe75ad9cf65a0638d2a06b6a5984d",
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"lessThan": "c0577c55219be42b6ea2ea8db11e85bfab6f4e8d",
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"status": "affected",
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"versionType": "git"
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},
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"status": "affected",
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},
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"status": "affected",
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},
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"lessThan": "6303ed4bbe0095f4cc195225479bf506e010d1db",
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"status": "affected",
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"status": "affected",
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{
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},
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{
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"version": "5.10.259",
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"lessThan": "5.10.261",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "5.15.210",
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"lessThan": "5.15.212",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.1.175",
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"lessThan": "6.1.178",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.6.142",
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"lessThan": "6.6.145",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.12.92",
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"lessThan": "6.12.96",
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"status": "affected",
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},
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{
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"version": "6.18.34",
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"lessThan": "6.18.39",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "7.0.11",
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"lessThan": "7.1",
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"status": "affected",
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"versionType": "semver"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/bluetooth/af_bluetooth.c",
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"net/bluetooth/l2cap_sock.c"
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],
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"versions": [
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{
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"version": "0",
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},
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{
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"version": "5.10.261",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.212",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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},
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{
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"version": "6.1.178",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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},
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{
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"version": "6.6.145",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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},
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{
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"version": "6.12.96",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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},
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{
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"version": "6.18.39",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.1.4",
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"lessThanOrEqual": "7.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/c0577c55219be42b6ea2ea8db11e85bfab6f4e8d"
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},
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{
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"url": "https://git.kernel.org/stable/c/96ad400d5132eb333f28f6f1e2d58f0728ca9547"
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},
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{
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"url": "https://git.kernel.org/stable/c/0a98ff4e7b867f72fbb4e1237d81e9fa02ded0a0"
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},
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{
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},
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{
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"url": "https://git.kernel.org/stable/c/6303ed4bbe0095f4cc195225479bf506e010d1db"
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},
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{
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"url": "https://git.kernel.org/stable/c/26168db1ce5a9766cde021b18e590a101c056614"
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},
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{
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"url": "https://git.kernel.org/stable/c/50c662bdcd51b03033a0abed6716bfd377ba1049"
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},
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{
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"url": "https://git.kernel.org/stable/c/4bd0b274054f2679f28b70222b607bb0afc3ab9a"
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}
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],
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"title": "Bluetooth: fix UAF in bt_accept_dequeue()",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-64406",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-16T15:40:14.651940Z"
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}
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-416",
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"description": "CWE-416 Use After Free"
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}
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]
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-19T20:38:27.281Z"
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}
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}
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]
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}
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} |