CVE-2026-46265Network attack vector

Service interruption via non-reclaim workqueue flush

Published Jun 3, 2026 · Updated Jun 3, 2026

Denial of service in the Linux Kernel HNS RoCE v2 driver allows remote attackers to interrupt service after a reset during SunRPC use. The hns_roce_irq_workq workqueue lacks WQ_MEM_RECLAIM, yet hns_roce_v2_destroy_qp flushes it while QP destruction frees memory. Reachability requires the HNS RoCE v2 driver, SunRPC over RDMA, and a device reset; the documented result is a workqueue dependency warning and availability loss.

CVSS severity7.5
High
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the Linux Kernel HNS RoCE v2 driver allows remote attackers to interrupt service after a reset during SunRPC use. The hns_roce_irq_workq workqueue lacks WQ_MEM_RECLAIM, yet hns_roce_v2_destroy_qp flushes it while QP destruction frees memory. Reachability requires the HNS RoCE v2 driver, SunRPC over RDMA, and a device reset; the documented result is a workqueue dependency warning and availability loss.

The record

CVE
CVE-2026-46265
Published
Jun 3, 2026
Updated
Jun 3, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 3, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.7
  2. Affected versionversion=ffd541d45726341c1830ff595fd7352b6d1cfbcd <0cbec8b49270f3f0600b8e3ef5e8f0d233dcea27
  3. Affected versionversion=ffd541d45726341c1830ff595fd7352b6d1cfbcd <12761bd0ae16a80f237c2a65ab1b1064076cc74a
  4. Affected versionversion=ffd541d45726341c1830ff595fd7352b6d1cfbcd <562c96b1393da2df3ea62173c84117b39da353b9
  5. Affected versionversion=ffd541d45726341c1830ff595fd7352b6d1cfbcd <70a5eb757ace5bd627a36f04d871eaf85def424d
  6. Affected versionversion=ffd541d45726341c1830ff595fd7352b6d1cfbcd <c0a26bbd3f99b7b03f072e3409aff4e6ec8af6f6
  7. Affected versionversion=ffd541d45726341c1830ff595fd7352b6d1cfbcd <c5ef9a1bcf5b597695d9c2e6ac452e9f89521862

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.7; version=ffd541d45726341c1830ff595fd7352b6d1cfbcd <0cbec8b49270f3f0600b8e3ef5e8f0d233dcea27; version=ffd541d45726341c1830ff595fd7352b6d1cfbcd <12761bd0ae16a80f237c2a65ab1b1064076cc74a; version=ffd541d45726341c1830ff595fd7352b6d1cfbcd <562c96b1393da2df3ea62173c84117b39da353b9; version=ffd541d45726341c1830ff595fd7352b6d1cfbcd <70a5eb757ace5bd627a36f04d871eaf85def424d; version=ffd541d45726341c1830ff595fd7352b6d1cfbcd <c0a26bbd3f99b7b03f072e3409aff4e6ec8af6f6; version=ffd541d45726341c1830ff595fd7352b6d1cfbcd <c5ef9a1bcf5b597695d9c2e6ac452e9f89521862

Published CVSS scores

7.5kernel.orgCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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