377 lines
19 KiB
JSON
377 lines
19 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-2023-53297",
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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": "2025-09-16T08:09:37.993Z",
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"datePublished": "2025-09-16T08:11:29.283Z",
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"dateUpdated": "2026-08-05T09:13:24.678Z"
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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": "2026-08-05T09:13:24.678Z"
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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: L2CAP: fix \"bad unlock balance\" in l2cap_disconnect_rsp\n\nconn->chan_lock isn't acquired before l2cap_get_chan_by_scid,\nif l2cap_get_chan_by_scid returns NULL, then 'bad unlock balance'\nis triggered."
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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:N/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 8.8,
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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 bug is reached only by processing an L2CAP Disconnect Response on the BR/EDR or LE signaling CID (hci_rx_work → l2cap_recv_acldata → l2cap_recv_frame → l2cap_disconnect_rsp), which requires a Bluetooth peer within radio range; kernel guidance maps Bluetooth to Adjacent.\nAC:L - The attacker reliably triggers the bad unlock by sending DISCONN_RSP with a nonexistent SCID, and can also drive concurrent chan_lock holders (channel timers, connect/disconnect churn) so the premature unlock races list walks; both sides are attacker-influenced with no uncontrollable condition.\nPR:N - l2cap_recv_frame dispatches CID 0x0001/0x0005 to the signaling handlers with no pairing, encryption, or security-level check, so an unauthenticated in-range device can send the triggering PDU on an established ACL/LE link.\nUI:N - No victim action is required; once the host is connectable/advertising with Bluetooth enabled (default on phones, cars, and laptops), the crafted PDU is processed automatically by hci_rx_work.\nS:U - Impact stays inside the host kernel Bluetooth/L2CAP authority; this is standard kernel memory-safety compromise, not a VM, IOMMU, or sandbox boundary crossing.\nC:H - Unlocking conn->chan_lock while another context (e.g. l2cap_chan_timeout) holds it exposes conn->chan_l to unsynchronized list manipulation and use-after-free of struct l2cap_chan, which per guidance enables heap reuse and arbitrary kernel read primitives.\nI:H - The same premature unlock races l2cap_chan_del/list walks against concurrent channel ops, yielding use-after-free write and function-pointer hijack primitives via sprayed reclaimed channel objects.\nA:H - The defect produces a lockdep \"bad unlock balance\" WARNING (panic under panic_on_warn) and, when it unlocks under a concurrent holder, use-after-free crashes/oopses on the channel list that an adjacent peer can re-trigger at will."
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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/l2cap_core.c"
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],
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"versions": [
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{
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"version": "f2d38e77aa5f3effc143e7dd24da8acf02925958",
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"lessThan": "5f352a56f0e607e6ff539cbf12156bfd8af232be",
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"status": "affected",
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"status": "affected",
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{
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"lessThan": "116b9c002c894097adc2b8684db2d1da4229ed46",
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"status": "affected",
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},
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"version": "4.14.313",
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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": "4.19.281",
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"lessThan": "4.19.284",
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},
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"version": "5.4.241",
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"lessThan": "5.4.244",
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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": "5.10.178",
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"lessThan": "5.10.181",
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"status": "affected",
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},
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{
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"version": "5.15.108",
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"lessThan": "5.15.113",
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"status": "affected",
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},
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{
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"version": "6.1.25",
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"status": "affected",
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},
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{
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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/l2cap_core.c"
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],
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{
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},
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{
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"version": "4.14.316",
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},
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{
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"status": "unaffected",
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},
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{
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"lessThanOrEqual": "5.4.*",
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"status": "unaffected",
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},
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{
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},
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{
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"version": "6.1.30",
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"lessThanOrEqual": "6.1.*",
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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": "6.3.4",
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"lessThanOrEqual": "6.3.*",
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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": "6.4",
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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/5f352a56f0e607e6ff539cbf12156bfd8af232be"
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},
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{
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"url": "https://git.kernel.org/stable/c/6a27762340ad08643de3bc17fe1646ea489ca2e2"
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},
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{
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"url": "https://git.kernel.org/stable/c/2112c4c47d36bc5aba3ddeb9afedce6ae6a67e7d"
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},
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{
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"url": "https://git.kernel.org/stable/c/55410a9144c76ecda126e6cdec556dfcd8f343b2"
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},
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{
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"url": "https://git.kernel.org/stable/c/116b9c002c894097adc2b8684db2d1da4229ed46"
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},
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{
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"url": "https://git.kernel.org/stable/c/fd269a0435f8e9943b7a57c5a59688848d42d449"
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},
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{
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"url": "https://git.kernel.org/stable/c/5134556c9be582793f30695c09d18a26fe1ff2d7"
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},
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{
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"url": "https://git.kernel.org/stable/c/25e97f7b1866e6b8503be349eeea44bb52d661ce"
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}
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],
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"title": "Bluetooth: L2CAP: fix \"bad unlock balance\" in l2cap_disconnect_rsp",
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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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"cvssV3_1": {
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"scope": "UNCHANGED",
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"version": "3.1",
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"baseScore": 5.5,
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"attackVector": "LOCAL",
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"baseSeverity": "MEDIUM",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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"integrityImpact": "NONE",
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"userInteraction": "NONE",
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"attackComplexity": "LOW",
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"availabilityImpact": "HIGH",
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"privilegesRequired": "LOW",
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"confidentialityImpact": "NONE"
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}
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},
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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-2023-53297",
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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": "partial"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-01-14T18:12:33.884627Z"
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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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"description": "CWE-noinfo Not enough information"
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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": "2026-01-14T18:12:56.873Z"
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}
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}
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]
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}
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} |