303 lines
17 KiB
JSON
303 lines
17 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-2025-38174",
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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": "2025-04-16T04:51:23.991Z",
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"datePublished": "2025-07-04T10:39:55.732Z",
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"dateUpdated": "2026-08-05T12:00:05.295Z"
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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": "2026-08-05T12:00:05.295Z"
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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\nthunderbolt: Do not double dequeue a configuration request\n\nSome of our devices crash in tb_cfg_request_dequeue():\n\n general protection fault, probably for non-canonical address 0xdead000000000122\n\n CPU: 6 PID: 91007 Comm: kworker/6:2 Tainted: G U W 6.6.65\n RIP: 0010:tb_cfg_request_dequeue+0x2d/0xa0\n Call Trace:\n <TASK>\n ? tb_cfg_request_dequeue+0x2d/0xa0\n tb_cfg_request_work+0x33/0x80\n worker_thread+0x386/0x8f0\n kthread+0xed/0x110\n ret_from_fork+0x38/0x50\n ret_from_fork_asm+0x1b/0x30\n\nThe circumstances are unclear, however, the theory is that\ntb_cfg_request_work() can be scheduled twice for a request:\nfirst time via frame.callback from ring_work() and second\ntime from tb_cfg_request(). Both times kworkers will execute\ntb_cfg_request_dequeue(), which results in double list_del()\nfrom the ctl->request_queue (the list poison deference hints\nat it: 0xdead000000000122).\n\nDo not dequeue requests that don't have TB_CFG_REQUEST_ACTIVE\nbit set."
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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 vulnerable control-channel request queue is driven by packets received over the Thunderbolt/USB4 fabric, and the trigger is fully reachable by a peer host or device on the other end of a Thunderbolt link via the XDomain protocol (`tb_xdomain_handle_request()` → `tb_xdp_handle_request()` → `__tb_xdomain_response()`), matching the adjacent-topology model used for other Thunderbolt XDomain issues.\nAC:L - The attacker controls both sides of the race — it elicits the host's XDomain response (which is queued with `TB_CFG_REQUEST_ACTIVE` and immediately `schedule_work()`ed because `req->response` is NULL) and then injects a matching `XDOMAIN_RESP`/`ERROR` packet to schedule the same work a second time, with unlimited retries and no attacker-independent preconditions.\nPR:N - XDomain discovery requests are processed and answered before any device authorization or security-level gate (UUID/unknown-type requests are answered even when no `tb_xdomain` is registered), so no credentials or privileges on the target are required.\nUI:N - Once a Thunderbolt link exists (dock, daisy chain, host-to-host cable, or a device the attacker attaches), the attack proceeds purely from attacker-sent control packets with no action by the local user.\nS:U - The corruption and its consequences are confined to the kernel's own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The duplicated work run drops an extra `tb_cfg_request_put()`, freeing the request while a second `tb_cfg_request_work()` still reads it — a use-after-free on a ~192–256 byte kmalloc object that, combined with the attacker-controlled `kmemdup()` spray in `tb_xdp_schedule_request()`, yields a kernel memory disclosure primitive.\nI:H - The second run of the work item calls `req->callback(req->callback_data)` and `mutex_lock(&req->ctl->request_queue_lock)`/`list_del()` on freed, reallocatable memory, giving an indirect call through an attacker-groomed function pointer plus list-based write primitives, i.e. potential control-flow hijack.\nA:H - The reported and readily reproduced outcome is a general protection fault in a kworker from the double `list_del()` on list poison, killing the worker while holding `ctl->request_queue_lock`, which oopses the kernel and wedges the Thunderbolt control channel."
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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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"drivers/thunderbolt/ctl.c"
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],
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"versions": [
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{
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"version": "16603153666d22df544ae9f9b3764fd18da28eeb",
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"lessThan": "e49e994cd83705f7ca30eda1e304abddfd96a37a",
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"status": "affected",
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"drivers/thunderbolt/ctl.c"
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],
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{
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"status": "affected"
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"version": "0",
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"status": "unaffected",
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},
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"version": "5.4.295",
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"lessThanOrEqual": "5.4.*",
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{
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"version": "5.10.239",
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},
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{
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"version": "6.1.142",
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"lessThanOrEqual": "6.1.*",
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},
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},
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{
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"lessThanOrEqual": "6.12.*",
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},
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{
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"lessThanOrEqual": "6.14.*",
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},
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{
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"version": "6.15.2",
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"lessThanOrEqual": "6.15.*",
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},
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{
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"version": "6.16",
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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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"url": "https://git.kernel.org/stable/c/e49e994cd83705f7ca30eda1e304abddfd96a37a"
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},
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},
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{
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"url": "https://git.kernel.org/stable/c/2f62eda4d974c26bc595425eafd429067541f2c9"
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{
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},
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{
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"url": "https://git.kernel.org/stable/c/5a057f261539720165d03d85024da2b52e67f63d"
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},
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{
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"url": "https://git.kernel.org/stable/c/eb2d5e794fb966b3ef8bde99eb8561446a53509f"
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},
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"url": "https://git.kernel.org/stable/c/0771bcbe2f6e5d5f263cf466efe571d2754a46da"
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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/0f73628e9da1ee39daf5f188190cdbaee5e0c98c"
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}
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],
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"title": "thunderbolt: Do not double dequeue a configuration request",
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"x_generator": {
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}
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},
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{
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"title": "CVE Program Container",
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"references": [
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{
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"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
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},
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{
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"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
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}
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],
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"shortName": "CVE",
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"dateUpdated": "2025-11-03T17:35:01.586Z"
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}
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}
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]
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}
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} |