{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-21885", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-12-29T08:45:45.782Z", "datePublished": "2025-03-27T14:57:13.219Z", "dateUpdated": "2026-08-05T11:55:07.964Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:55:07.964Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/bnxt_re: Fix the page details for the srq created by kernel consumers\n\nWhile using nvme target with use_srq on, below kernel panic is noticed.\n\n[ 549.698111] bnxt_en 0000:41:00.0 enp65s0np0: FEC autoneg off encoding: Clause 91 RS(544,514)\n[ 566.393619] Oops: divide error: 0000 [#1] PREEMPT SMP NOPTI\n..\n[ 566.393799] \n[ 566.393807] ? __die_body+0x1a/0x60\n[ 566.393823] ? die+0x38/0x60\n[ 566.393835] ? do_trap+0xe4/0x110\n[ 566.393847] ? bnxt_qplib_alloc_init_hwq+0x1d4/0x580 [bnxt_re]\n[ 566.393867] ? bnxt_qplib_alloc_init_hwq+0x1d4/0x580 [bnxt_re]\n[ 566.393881] ? do_error_trap+0x7c/0x120\n[ 566.393890] ? bnxt_qplib_alloc_init_hwq+0x1d4/0x580 [bnxt_re]\n[ 566.393911] ? exc_divide_error+0x34/0x50\n[ 566.393923] ? bnxt_qplib_alloc_init_hwq+0x1d4/0x580 [bnxt_re]\n[ 566.393939] ? asm_exc_divide_error+0x16/0x20\n[ 566.393966] ? bnxt_qplib_alloc_init_hwq+0x1d4/0x580 [bnxt_re]\n[ 566.393997] bnxt_qplib_create_srq+0xc9/0x340 [bnxt_re]\n[ 566.394040] bnxt_re_create_srq+0x335/0x3b0 [bnxt_re]\n[ 566.394057] ? srso_return_thunk+0x5/0x5f\n[ 566.394068] ? __init_swait_queue_head+0x4a/0x60\n[ 566.394090] ib_create_srq_user+0xa7/0x150 [ib_core]\n[ 566.394147] nvmet_rdma_queue_connect+0x7d0/0xbe0 [nvmet_rdma]\n[ 566.394174] ? lock_release+0x22c/0x3f0\n[ 566.394187] ? srso_return_thunk+0x5/0x5f\n\nPage size and shift info is set only for the user space SRQs.\nSet page size and page shift for kernel space SRQs also." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:N - The crash is reached from `nvmet_rdma_queue_connect()`, the handler for an inbound RDMA CM connect request on the NVMe-oF target's listening endpoint; bnxt_re is a RoCE device and RoCEv2 is UDP/IP-encapsulated and fully routable, so a remote off-segment initiator can drive the path.\nAC:L - The divide-by-zero is deterministic — `sg_info.pgsize` is unconditionally 0 for every kernel-created SRQ — so the very first connect request from the attacker triggers it with no race, timing, or memory-layout dependency.\nPR:N - SRQ allocation happens in `nvmet_rdma_find_get_device()` at the top of the connect-request handler, before the NVMe fabrics Connect command, host-NQN allow-list checks, or any authentication, so an entirely unauthenticated remote peer reaches it.\nUI:N - The target processes inbound RDMA CM connect requests autonomously; no local user or administrator action is needed once the nvmet-rdma port is listening.\nS:U - The fault is a divide error inside the kernel affecting only the host kernel's own resources, with no crossing of a VM, IOMMU, or other security authority boundary.\nC:N - The zero divisor causes a `#DE` trap before any allocation, pointer arithmetic, or buffer access occurs, so no out-of-bounds read or information disclosure primitive exists.\nI:N - No memory is corrupted or written out of bounds — the failure is a CPU exception on the division itself, giving no write or control-flow primitive.\nA:H - The divide error Oopses the RDMA CM workqueue thread while `device_list_mutex` and the cma `handler_mutex` are held, permanently deadlocking nvmet-rdma and RDMA connection management, and produces a full kernel panic with `panic_on_oops=1`." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/infiniband/hw/bnxt_re/ib_verbs.c" ], "versions": [ { "version": "0c4dcd602817502bb3dced7a834a13ef717d65a4", "lessThan": "722c3db62bf60cd23acbdc8c4f445bfedae4498e", "status": "affected", "versionType": "git" }, { "version": "0c4dcd602817502bb3dced7a834a13ef717d65a4", "lessThan": "2cf8e6b52aecb8fbb71c41fe5add3212814031a2", "status": "affected", "versionType": "git" }, { "version": "0c4dcd602817502bb3dced7a834a13ef717d65a4", "lessThan": "b66535356a4834a234f99e16a97eb51f2c6c5a7d", "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/infiniband/hw/bnxt_re/ib_verbs.c" ], "versions": [ { "version": "5.7", "status": "affected" }, { "version": "0", "lessThan": "5.7", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.18", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.13.6", "lessThanOrEqual": "6.13.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.14", "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": "5.7", "versionEndExcluding": "6.12.18" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "6.13.6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "6.14" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/722c3db62bf60cd23acbdc8c4f445bfedae4498e" }, { "url": "https://git.kernel.org/stable/c/2cf8e6b52aecb8fbb71c41fe5add3212814031a2" }, { "url": "https://git.kernel.org/stable/c/b66535356a4834a234f99e16a97eb51f2c6c5a7d" } ], "title": "RDMA/bnxt_re: Fix the page details for the srq created by kernel consumers", "x_generator": { "engine": "bippy-1.2.0" } } } }