CVE-2026-46265 (GCVE-0-2026-46265)
Vulnerability from cvelistv5 – Published: 2026-06-03 15:50 – Updated: 2026-08-05 12:30
VLAI
EPSS
VEX
Title
RDMA/hns: Fix WQ_MEM_RECLAIM warning
Summary
In the Linux kernel, the following vulnerability has been resolved:
RDMA/hns: Fix WQ_MEM_RECLAIM warning
When sunrpc is used, if a reset triggered, our wq may lead the
following trace:
workqueue: WQ_MEM_RECLAIM xprtiod:xprt_rdma_connect_worker [rpcrdma]
is flushing !WQ_MEM_RECLAIM hns_roce_irq_workq:flush_work_handle
[hns_roce_hw_v2]
WARNING: CPU: 0 PID: 8250 at kernel/workqueue.c:2644 check_flush_dependency+0xe0/0x144
Call trace:
check_flush_dependency+0xe0/0x144
start_flush_work.constprop.0+0x1d0/0x2f0
__flush_work.isra.0+0x40/0xb0
flush_work+0x14/0x30
hns_roce_v2_destroy_qp+0xac/0x1e0 [hns_roce_hw_v2]
ib_destroy_qp_user+0x9c/0x2b4
rdma_destroy_qp+0x34/0xb0
rpcrdma_ep_destroy+0x28/0xcc [rpcrdma]
rpcrdma_ep_put+0x74/0xb4 [rpcrdma]
rpcrdma_xprt_disconnect+0x1d8/0x260 [rpcrdma]
xprt_rdma_connect_worker+0xc0/0x120 [rpcrdma]
process_one_work+0x1cc/0x4d0
worker_thread+0x154/0x414
kthread+0x104/0x144
ret_from_fork+0x10/0x18
Since QP destruction frees memory, this wq should have the WQ_MEM_RECLAIM.
Severity
7.5 (High)
Assigner
References
6 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
ffd541d45726341c1830ff595fd7352b6d1cfbcd , < 12761bd0ae16a80f237c2a65ab1b1064076cc74a
(git)
Affected: ffd541d45726341c1830ff595fd7352b6d1cfbcd , < 70a5eb757ace5bd627a36f04d871eaf85def424d (git) Affected: ffd541d45726341c1830ff595fd7352b6d1cfbcd , < 562c96b1393da2df3ea62173c84117b39da353b9 (git) Affected: ffd541d45726341c1830ff595fd7352b6d1cfbcd , < 0cbec8b49270f3f0600b8e3ef5e8f0d233dcea27 (git) Affected: ffd541d45726341c1830ff595fd7352b6d1cfbcd , < c5ef9a1bcf5b597695d9c2e6ac452e9f89521862 (git) Affected: ffd541d45726341c1830ff595fd7352b6d1cfbcd , < c0a26bbd3f99b7b03f072e3409aff4e6ec8af6f6 (git) |
guessed | |
| Linux | Linux |
Affected:
5.7
Unaffected: 0 , < 5.7 (semver) Unaffected: 6.1.165 , ≤ 6.1.* (semver) Unaffected: 6.6.128 , ≤ 6.6.* (semver) Unaffected: 6.12.75 , ≤ 6.12.* (semver) Unaffected: 6.18.14 , ≤ 6.18.* (semver) Unaffected: 6.19.4 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix) |
guessed |
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/hns: Fix WQ_MEM_RECLAIM warning\n\nWhen sunrpc is used, if a reset triggered, our wq may lead the\nfollowing trace:\n\nworkqueue: WQ_MEM_RECLAIM xprtiod:xprt_rdma_connect_worker [rpcrdma]\nis flushing !WQ_MEM_RECLAIM hns_roce_irq_workq:flush_work_handle\n[hns_roce_hw_v2]\nWARNING: CPU: 0 PID: 8250 at kernel/workqueue.c:2644 check_flush_dependency+0xe0/0x144\nCall trace:\n check_flush_dependency+0xe0/0x144\n start_flush_work.constprop.0+0x1d0/0x2f0\n __flush_work.isra.0+0x40/0xb0\n flush_work+0x14/0x30\n hns_roce_v2_destroy_qp+0xac/0x1e0 [hns_roce_hw_v2]\n ib_destroy_qp_user+0x9c/0x2b4\n rdma_destroy_qp+0x34/0xb0\n rpcrdma_ep_destroy+0x28/0xcc [rpcrdma]\n rpcrdma_ep_put+0x74/0xb4 [rpcrdma]\n rpcrdma_xprt_disconnect+0x1d8/0x260 [rpcrdma]\n xprt_rdma_connect_worker+0xc0/0x120 [rpcrdma]\n process_one_work+0x1cc/0x4d0\n worker_thread+0x154/0x414\n kthread+0x104/0x144\n ret_from_fork+0x10/0x18\n\nSince QP destruction frees memory, this wq should have the WQ_MEM_RECLAIM."
}
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"value": "AV:N - The bug is reached when an RPC-over-RDMA path tears down a HiSilicon HNS queue pair; remote NFS/RDMA peers can force disconnect/reconnect and QP destruction on internet- or fabric-facing storage nodes (svc_rdma / rpcrdma), which is network-driven rather than purely local ioctl access.\nAC:L - Once NFS-over-RDMA and HNS RoCE are enabled, a remote peer can repeatedly trigger disconnect and failed reconnect work; combined with routine memory-reclaim pressure (PF_MEMALLOC on the NFS swap path) or NIC reset, the WARN/deadlock path is attacker-influenceable without rare one-off victim state.\nPR:N - On an NFS-over-RDMA server the vulnerable ib_destroy_qp/flush_work path runs while handling RDMA CM disconnects from network clients, before any per-file NFS authorization; no local UNIX privileges on the victim are required beyond the service already being exposed.\nUI:N - Exploitation requires only network traffic and kernel-side RPC/RDMA handling; no end-user actions such as mounting a filesystem or clicking a link are needed on the victim.\nS:U - Impact is confined to kernel workqueue forward-progress and availability on the host running the HNS driver; it does not cross VM, container, or IOMMU security boundaries.\nC:N - The flaw is a missing WQ_MEM_RECLAIM flag leading to check_flush_dependency WARN_ONCE and possible reclaim deadlock; there is no memory corruption, out-of-bounds access, or use-after-free that could yield information disclosure.\nI:N - No attacker-controlled writes, type confusion, or code-execution primitive exist; the failure mode is a workqueue dependency violation during QP flush/destroy, not integrity compromise of data or code.\nA:H - Violating the workqueue forward-progress rule can deadlock memory reclaim, and the observed WARN_ONCE becomes a kernel panic when panic_on_warn is enabled; even without panic, a stuck reclaim path is a full host availability failure."
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{
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"title": "RDMA/hns: Fix WQ_MEM_RECLAIM warning",
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"cveId": "CVE-2026-46265",
"datePublished": "2026-06-03T15:50:05.933Z",
"dateReserved": "2026-05-13T15:03:33.108Z",
"dateUpdated": "2026-08-05T12:30:52.435Z",
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rpcrdma_ep_destroy+0x28/0xcc [rpcrdma]\\n rpcrdma_ep_put+0x74/0xb4 [rpcrdma]\\n rpcrdma_xprt_disconnect+0x1d8/0x260 [rpcrdma]\\n xprt_rdma_connect_worker+0xc0/0x120 [rpcrdma]\\n process_one_work+0x1cc/0x4d0\\n worker_thread+0x154/0x414\\n kthread+0x104/0x144\\n ret_from_fork+0x10/0x18\\n\\nSince QP destruction frees memory, this wq should have the WQ_MEM_RECLAIM.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\\n\\nRDMA/hns: Solucionar advertencia WQ_MEM_RECLAIM\\n\\nCuando se usa sunrpc, si se activa un reinicio, nuestro wq puede generar el siguiente rastro:\\n\\nworkqueue: WQ_MEM_RECLAIM xprtiod:xprt_rdma_connect_worker [rpcrdma]\\nis flushing !WQ_MEM_RECLAIM hns_roce_irq_workq:flush_work_handle\\n[hns_roce_hw_v2]\\nWARNING: CPU: 0 PID: 8250 at kernel/workqueue.c:2644 check_flush_dependency+0xe0/0x144\\nCall trace:\\n check_flush_dependency+0xe0/0x144\\n start_flush_work.constprop.0+0x1d0/0x2f0\\n __flush_work.isra.0+0x40/0xb0\\n flush_work+0x14/0x30\\n hns_roce_v2_destroy_qp+0xac/0x1e0 [hns_roce_hw_v2]\\n ib_destroy_qp_user+0x9c/0x2b4\\n rdma_destroy_qp+0x34/0xb0\\n rpcrdma_ep_destroy+0x28/0xcc [rpcrdma]\\n rpcrdma_ep_put+0x74/0xb4 [rpcrdma]\\n rpcrdma_xprt_disconnect+0x1d8/0x260 [rpcrdma]\\n xprt_rdma_connect_worker+0xc0/0x120 [rpcrdma]\\n process_one_work+0x1cc/0x4d0\\n worker_thread+0x154/0x414\\n kthread+0x104/0x144\\n ret_from_fork+0x10/0x18\\n\\nDado que la destrucci\u00f3n de QP libera memoria, este wq deber\u00eda tener el 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"redhat_vex": {
"aggregate_severity": "None",
"current_release_date": "2026-06-28T07:41:53+00:00",
"cve": "CVE-2026-46265",
"id": "CVE-2026-46265",
"initial_release_date": "2026-06-03T00:00:00+00:00",
"product_status:known_not_affected": "274",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: RDMA/hns: Fix WQ_MEM_RECLAIM warning",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46265.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-11T01:10:28Z",
"cve": "CVE-2026-46265",
"id": "CVE-2026-46265",
"initial_release_date": "2026-06-04T02:21:44Z",
"product_status:first_fixed": "2",
"product_status:known_affected": "583",
"product_status:known_not_affected": "149",
"product_status:recommended": "250",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-46265",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-46265.json",
"version": "11"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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