{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-38174", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T04:51:23.991Z", "datePublished": "2025-07-04T10:39:55.732Z", "dateUpdated": "2026-08-05T12:00:05.295Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:00:05.295Z" }, "descriptions": [ { "lang": "en", "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 \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." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "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." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/thunderbolt/ctl.c" ], "versions": [ { "version": "16603153666d22df544ae9f9b3764fd18da28eeb", "lessThan": "e49e994cd83705f7ca30eda1e304abddfd96a37a", "status": "affected", "versionType": "git" }, { "version": "16603153666d22df544ae9f9b3764fd18da28eeb", "lessThan": "0a3011d47dbc92a33621861c423cb64833d7fe57", "status": "affected", "versionType": "git" }, { "version": "16603153666d22df544ae9f9b3764fd18da28eeb", "lessThan": "2f62eda4d974c26bc595425eafd429067541f2c9", "status": "affected", "versionType": "git" }, { "version": "16603153666d22df544ae9f9b3764fd18da28eeb", "lessThan": "85286e634ebbaf9c0fb1cdf580add2f33fc7628c", "status": "affected", "versionType": "git" }, { "version": "16603153666d22df544ae9f9b3764fd18da28eeb", "lessThan": "5a057f261539720165d03d85024da2b52e67f63d", "status": "affected", "versionType": "git" }, { "version": "16603153666d22df544ae9f9b3764fd18da28eeb", "lessThan": "eb2d5e794fb966b3ef8bde99eb8561446a53509f", "status": "affected", "versionType": "git" }, { "version": "16603153666d22df544ae9f9b3764fd18da28eeb", "lessThan": "0771bcbe2f6e5d5f263cf466efe571d2754a46da", "status": "affected", "versionType": "git" }, { "version": "16603153666d22df544ae9f9b3764fd18da28eeb", "lessThan": "cdb4feab2f39e75a66239e3a112beced279612a8", "status": "affected", "versionType": "git" }, { "version": "16603153666d22df544ae9f9b3764fd18da28eeb", "lessThan": "0f73628e9da1ee39daf5f188190cdbaee5e0c98c", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/thunderbolt/ctl.c" ], "versions": [ { "version": "3.17", "status": "affected" }, { "version": "0", "lessThan": "3.17", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.295", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.239", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.186", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.142", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.94", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.33", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.14.11", "lessThanOrEqual": "6.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.15.2", "lessThanOrEqual": "6.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.16", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "5.4.295" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "5.10.239" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "5.15.186" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "6.1.142" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "6.6.94" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "6.12.33" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "6.14.11" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "6.15.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "6.16" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/e49e994cd83705f7ca30eda1e304abddfd96a37a" }, { "url": "https://git.kernel.org/stable/c/0a3011d47dbc92a33621861c423cb64833d7fe57" }, { "url": "https://git.kernel.org/stable/c/2f62eda4d974c26bc595425eafd429067541f2c9" }, { "url": "https://git.kernel.org/stable/c/85286e634ebbaf9c0fb1cdf580add2f33fc7628c" }, { "url": "https://git.kernel.org/stable/c/5a057f261539720165d03d85024da2b52e67f63d" }, { "url": "https://git.kernel.org/stable/c/eb2d5e794fb966b3ef8bde99eb8561446a53509f" }, { "url": "https://git.kernel.org/stable/c/0771bcbe2f6e5d5f263cf466efe571d2754a46da" }, { "url": "https://git.kernel.org/stable/c/cdb4feab2f39e75a66239e3a112beced279612a8" }, { "url": "https://git.kernel.org/stable/c/0f73628e9da1ee39daf5f188190cdbaee5e0c98c" } ], "title": "thunderbolt: Do not double dequeue a configuration request", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html" }, { "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T17:35:01.586Z" } } ] } }