159 lines
9.7 KiB
JSON
159 lines
9.7 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-2025-21805",
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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": "2024-12-29T08:45:45.771Z",
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"datePublished": "2025-02-27T20:00:58.290Z",
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"dateUpdated": "2026-08-05T11:54:34.615Z"
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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": "2026-08-05T11:54:34.615Z"
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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\nRDMA/rtrs: Add missing deinit() call\n\nA warning is triggered when repeatedly connecting and disconnecting the\nrnbd:\n list_add corruption. prev->next should be next (ffff88800b13e480), but was ffff88801ecd1338. (prev=ffff88801ecd1340).\n WARNING: CPU: 1 PID: 36562 at lib/list_debug.c:32 __list_add_valid_or_report+0x7f/0xa0\n Workqueue: ib_cm cm_work_handler [ib_cm]\n RIP: 0010:__list_add_valid_or_report+0x7f/0xa0\n ? __list_add_valid_or_report+0x7f/0xa0\n ib_register_event_handler+0x65/0x93 [ib_core]\n rtrs_srv_ib_dev_init+0x29/0x30 [rtrs_server]\n rtrs_ib_dev_find_or_add+0x124/0x1d0 [rtrs_core]\n __alloc_path+0x46c/0x680 [rtrs_server]\n ? rtrs_rdma_connect+0xa6/0x2d0 [rtrs_server]\n ? rcu_is_watching+0xd/0x40\n ? __mutex_lock+0x312/0xcf0\n ? get_or_create_srv+0xad/0x310 [rtrs_server]\n ? rtrs_rdma_connect+0xa6/0x2d0 [rtrs_server]\n rtrs_rdma_connect+0x23c/0x2d0 [rtrs_server]\n ? __lock_release+0x1b1/0x2d0\n cma_cm_event_handler+0x4a/0x1a0 [rdma_cm]\n cma_ib_req_handler+0x3a0/0x7e0 [rdma_cm]\n cm_process_work+0x28/0x1a0 [ib_cm]\n ? _raw_spin_unlock_irq+0x2f/0x50\n cm_req_handler+0x618/0xa60 [ib_cm]\n cm_work_handler+0x71/0x520 [ib_cm]\n\nCommit 667db86bcbe8 (\"RDMA/rtrs: Register ib event handler\") introduced a\nnew element .deinit but never used it at all. Fix it by invoking the\n`deinit()` to appropriately unregister the IB event handler."
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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:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 9.8,
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"baseSeverity": "CRITICAL"
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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:N - The rtrs server listens on IN6ADDR_ANY for RDMA CM connection requests and processes remote peers' connect-request private data in `rtrs_rdma_connect()`, which drives both the allocation and the free of the affected object; over RoCEv2 (UDP) and iWARP (TCP) this is IP-routable rather than fabric-local.\nAC:L - The dangling `ib_event_handler` is left registered on every teardown of the last path — deterministic, with no race to win and no precondition outside the attacker's control, since the attacker drives both the connect (register) and the disconnect (free) sides at will.\nPR:N - RTRS performs no authentication whatsoever; `rtrs_srv_rdma_cm_handler()` hands an unauthenticated CONNECT_REQUEST directly to `rtrs_rdma_connect()`, which validates only a magic constant and version before reaching `rtrs_ib_dev_find_or_add()`.\nUI:N - Exploitation requires only that the attacker open and tear down RDMA connections to the listening server; no action by any local user or administrator is involved.\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 freed `rtrs_ib_dev` remains linked in the IB core's device-wide handler list, so list traversal and the `handler->handler()` dispatch dereference attacker-groomable freed heap memory in the generic kmalloc-96 cache, yielding read and control primitives suitable for disclosing arbitrary kernel memory.\nI:H - `ib_register_event_handler()`'s `list_add_tail()` and any peer handler's `list_del()` write through pointers in the freed object, and `ib_dispatch_event_clients()` calls a function pointer read from it — giving both a write primitive and a direct control-flow hijack after heap spraying.\nA:H - The immediate observed effect is list corruption (WARNING with CONFIG_DEBUG_LIST, silent corruption and subsequent oops/panic without it), and any dispatched IB async event calls into freed memory, crashing the kernel."
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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/infiniband/ulp/rtrs/rtrs.c"
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],
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"versions": [
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{
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"version": "667db86bcbe82e789d82c2e8c8c40756ec2e1999",
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"lessThan": "5a79cc9bc961fafe90787f86e8f53ba6fad8d63b",
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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": "667db86bcbe82e789d82c2e8c8c40756ec2e1999",
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"lessThan": "1af2c769032b6b334cd2a867d7d8c7cbbc527b2d",
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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": "667db86bcbe82e789d82c2e8c8c40756ec2e1999",
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"lessThan": "81468c4058a62e84e475433b83b3edc613294f5e",
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"status": "affected",
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"versionType": "git"
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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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"drivers/infiniband/ulp/rtrs/rtrs.c"
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],
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"versions": [
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{
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"version": "6.12",
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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": "6.12",
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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": "6.12.13",
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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": "6.13.2",
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"lessThanOrEqual": "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": "6.14",
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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",
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"versionEndExcluding": "6.12.13"
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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": "6.12",
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"versionEndExcluding": "6.13.2"
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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": "6.12",
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"versionEndExcluding": "6.14"
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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/5a79cc9bc961fafe90787f86e8f53ba6fad8d63b"
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},
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{
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"url": "https://git.kernel.org/stable/c/1af2c769032b6b334cd2a867d7d8c7cbbc527b2d"
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},
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{
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"url": "https://git.kernel.org/stable/c/81468c4058a62e84e475433b83b3edc613294f5e"
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}
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],
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"title": "RDMA/rtrs: Add missing deinit() call",
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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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} |