CVE-2026-46114Network attack vector

Remote kernel-memory disclosure via zero-length ATOMIC_WRITE

Published May 28, 2026 · Updated May 28, 2026

Out-of-bounds read in Linux Kernel allows remote attackers to disclose kernel memory via a zero-length Soft-RoCE ATOMIC_WRITE request. check_rkey() accepts a request whose packet length and RETH length are both zero, after which atomic_write_reply() unconditionally reads eight bytes past the logical payload and copies them to the initiator's memory region. Exposure requires an active RDMA_RXE responder and a usable remote key; each repeatable probe returns four bytes of adjacent kernel tailroom while leaving target integrity and availability unchanged.

CVSS severity7.5
High
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Linux Kernel allows remote attackers to disclose kernel memory via a zero-length Soft-RoCE ATOMIC_WRITE request. check_rkey() accepts a request whose packet length and RETH length are both zero, after which atomic_write_reply() unconditionally reads eight bytes past the logical payload and copies them to the initiator's memory region. Exposure requires an active RDMA_RXE responder and a usable remote key; each repeatable probe returns four bytes of adjacent kernel tailroom while leaving target integrity and availability unchanged.

The record

CVE
CVE-2026-46114
Published
May 28, 2026
Updated
May 28, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-476, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 28, 2026CVE publishedPublication date reported by the CVE source.
  2. May 28, 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=034e285f8b99062a0cf29112e1232154a6a44aa5 <105bf79a23b85cf3a761d18a4f3e10ce88526bc1
  2. Affected versionversion=034e285f8b99062a0cf29112e1232154a6a44aa5 <1114c87aa6f195cf07da55a27b2122ae26557b26
  3. Affected versionversion=034e285f8b99062a0cf29112e1232154a6a44aa5 <539cabb7b2d8ba70f55bba91db55faef11c2a6d7
  4. Affected versionversion=034e285f8b99062a0cf29112e1232154a6a44aa5 <7ec1ed4747f5f99f8b797bb438c5efd36079fad5
  5. Affected versionversion=034e285f8b99062a0cf29112e1232154a6a44aa5 <d415fce3fcde6d7aeea6c25362a395b905811452
  6. Affected versionversion=6.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=034e285f8b99062a0cf29112e1232154a6a44aa5 <105bf79a23b85cf3a761d18a4f3e10ce88526bc1; version=034e285f8b99062a0cf29112e1232154a6a44aa5 <1114c87aa6f195cf07da55a27b2122ae26557b26; version=034e285f8b99062a0cf29112e1232154a6a44aa5 <539cabb7b2d8ba70f55bba91db55faef11c2a6d7; version=034e285f8b99062a0cf29112e1232154a6a44aa5 <7ec1ed4747f5f99f8b797bb438c5efd36079fad5; version=034e285f8b99062a0cf29112e1232154a6a44aa5 <d415fce3fcde6d7aeea6c25362a395b905811452; version=6.2

Published CVSS scores

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

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

CWE-476NULL Pointer Dereference
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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