186 lines
11 KiB
JSON
186 lines
11 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-2026-99013",
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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": "2026-09-25T10:25:14.385Z",
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"datePublished": "2026-10-23T12:20:38.612Z",
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"dateUpdated": "2026-10-24T14:10:01.562Z"
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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": "2026-10-24T14:10:01.562Z"
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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: ISO: Reject concurrent BIS listener setup\n\niso_sock_listen() drops the socket lock before calling iso_listen_bis()\nto preserve the hdev->lock ordering. Two concurrent listen() calls on\nthe same broadcast socket can therefore both observe BT_BOUND. Caller\nA can attach connA and release the locks, then caller B can acquire\nthem and attach connB before A publishes BT_LISTEN.\n\n__iso_chan_add() checks whether connB already has a socket, but not\nwhether the socket already has a connection. The second attachment\noverwrites iso_pi(sk)->conn, leaking the connA reference and leaving\nconnA->sk intact. Socket teardown follows connB, so later events on\nconnA can cause a stale socket access.\n\nRecheck BT_BOUND and require iso_pi(sk)->conn to be NULL after taking\nboth the HCI device and socket locks in iso_listen_bis(). The connection\ncheck also covers the interval between attachment and publication of\nBT_LISTEN. Reject a competing setup with -EBADFD through the existing\nunlock path before allocating another connection.\n\nA recorded KASAN report from an instrumented kernel shows:\n\n BUG: KASAN: slab-use-after-free in iso_sock_hold+0x119/0x1f0\n Call Trace:\n iso_sock_hold+0x119/0x1f0\n iso_conn_del+0xe4/0x270\n hci_disconn_complete_evt+0x351/0x8c0\n hci_event_packet+0x71b/0xb20\n hci_rx_work+0x293/0x730\n\n Allocated by task 93:\n sk_prot_alloc+0x113/0x220\n sk_alloc+0x2b/0x6d0\n bt_sock_alloc+0x29/0x370\n iso_sock_alloc.constprop.0+0x19/0x300\n iso_sock_create+0x94/0x100\n\n Freed by task 93:\n kfree+0x121/0x3c0\n __sk_destruct+0x42b/0x540\n iso_sock_release+0x29d/0x340\n __sock_release+0xa1/0x260\n sock_close+0x10/0x20"
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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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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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:L - The bad state is created by one process issuing two concurrent listen() syscalls on the same bound BTPROTO_ISO socket; __sys_listen_socket() reaches iso_sock_listen() and the patched iso_listen_bis(). An HCI disconnect only consumes the stranded connA->sk, so an adjacent peer cannot create the race alone.\nAC:L - Attacker threads control both listen() calls and can make each observe BT_BOUND before either publishes BT_LISTEN, causing hci_pa_create_sync() to create separate candidates. The attacker can close the socket and end its own broadcast/sync to drive teardown, without victim-controlled timing.\nPR:L - bt_sock_create(), iso_sock_create(), iso_sock_bind(), and iso_sock_listen() contain no capable() or ns_capable() check, so an ordinary process in init_net can create and race the socket. A separate network namespace is rejected, but no user namespace or capability is needed.\nUI:N - The attacker creates and binds the ISO socket, launches both listen() calls, and closes it; the later HCI callback is asynchronous kernel/controller work. No victim action is required.\nS:U - iso_conn_del() corrupts memory within the same host kernel that implements the attacker's ISO socket; the path crosses no VM, IOMMU, or other security authority boundary.\nC:H - After iso_pi(sk)->conn is overwritten, connA retains connA->sk and iso_sock_hold() can refcount a freed or reclaimed kmalloc-2k struct iso_pinfo. Exploiting the ensuing callback-capable socket operations permits control-flow hijack and arbitrary kernel-memory disclosure.\nI:H - iso_conn_del() passes the stale sk to iso_chan_del(), which writes sk_state and sk_err and invokes sk_state_change or parent->sk_data_ready. Reclaiming the freed object can turn these operations into arbitrary writes or control-flow hijacking.\nA:H - KASAN observed the slab use-after-free in iso_sock_hold() from hci_disconn_complete_evt() after iso_sock_release() freed the socket. Invalid refcount, locking, and callback accesses can cause a kernel oops or panic."
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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/iso.c"
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],
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"versions": [
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{
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"version": "c541d7b5e17987ed330798b07d4ad508859c1c93",
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"lessThan": "559e4d2b6f83aaa96061659cc7104b7a0293f9ef",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "168e28305b871d8ec604a8f51f35467b8d7ba05b",
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"lessThan": "90b744066ca520d1a6a505a11ade9c9a5f48accf",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "168e28305b871d8ec604a8f51f35467b8d7ba05b",
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"lessThan": "79993e9919a87068183ba3622c383f05c049c4bc",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "168e28305b871d8ec604a8f51f35467b8d7ba05b",
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"lessThan": "555ff78fa719f50ff4cdbdb40aa1acc6e8e327d3",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "6.12.6",
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"lessThan": "6.12.113",
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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/iso.c"
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],
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"versions": [
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{
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"version": "6.13",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.13",
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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": "6.12.113",
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"lessThanOrEqual": "6.12.*",
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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": "6.18.57",
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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": "7.2.11",
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"lessThanOrEqual": "7.2.*",
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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": "7.3",
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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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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.12.6",
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"versionEndExcluding": "6.12.113"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.13",
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"versionEndExcluding": "6.18.57"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.13",
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"versionEndExcluding": "7.2.11"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.13",
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"versionEndExcluding": "7.3"
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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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"references": [
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{
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"url": "https://git.kernel.org/stable/c/559e4d2b6f83aaa96061659cc7104b7a0293f9ef"
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},
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{
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"url": "https://git.kernel.org/stable/c/90b744066ca520d1a6a505a11ade9c9a5f48accf"
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},
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{
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"url": "https://git.kernel.org/stable/c/79993e9919a87068183ba3622c383f05c049c4bc"
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},
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{
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"url": "https://git.kernel.org/stable/c/555ff78fa719f50ff4cdbdb40aa1acc6e8e327d3"
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}
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],
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"title": "Bluetooth: ISO: Reject concurrent BIS listener setup",
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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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}
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} |