CVE-2026-46325Network attack vector

Remote memory corruption via RXE page misindexing

Published Jun 9, 2026 · Updated Jun 9, 2026

Memory corruption in the Linux Kernel RXE driver allows remote attackers to access unintended kernel memory through RDMA operations. The memory-region code indexes system-page pointers in MR-page-size steps, so iova-to-va conversion selects the wrong page when the sizes differ. Reachability requires RXE and a memory region whose page size differs from PAGE_SIZE; consequences include unintended memory access or a kernel panic.

CVSS severity9.8
Critical
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in the Linux Kernel RXE driver allows remote attackers to access unintended kernel memory through RDMA operations. The memory-region code indexes system-page pointers in MR-page-size steps, so iova-to-va conversion selects the wrong page when the sizes differ. Reachability requires RXE and a memory region whose page size differs from PAGE_SIZE; consequences include unintended memory access or a kernel panic.

The record

CVE
CVE-2026-46325
Published
Jun 9, 2026
Updated
Jun 9, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-823, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 9, 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=0e443760b8b7b1e6723f4408afa056b2bc4fea12
  2. Affected versionversion=592627ccbdff0ec6fff00fc761142a76db750dd4 <12985e5915a0b8354796efadaaeb201eed115377
  3. Affected versionversion=592627ccbdff0ec6fff00fc761142a76db750dd4 <409c2c5508f3d30627bea576f8676de523cb906e
  4. Affected versionversion=592627ccbdff0ec6fff00fc761142a76db750dd4 <836f6c13c9674027793f720be3f15ecd2b90b6ca
  5. Affected versionversion=6.2.3 <6.3
  6. Affected versionversion=6.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=0e443760b8b7b1e6723f4408afa056b2bc4fea12; version=592627ccbdff0ec6fff00fc761142a76db750dd4 <12985e5915a0b8354796efadaaeb201eed115377; version=592627ccbdff0ec6fff00fc761142a76db750dd4 <409c2c5508f3d30627bea576f8676de523cb906e; version=592627ccbdff0ec6fff00fc761142a76db750dd4 <836f6c13c9674027793f720be3f15ecd2b90b6ca; version=6.2.3 <6.3; version=6.3

Published CVSS scores

9.8Linux CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-823Use of Out-of-range Pointer Offset
T1210Exploitation of Remote Services

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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