CVE-2026-46145

Kernel memory corruption via unchecked RDMA length

Published May 28, 2026 · Updated May 28, 2026

Out-of-bounds write in the Linux Kernel mana RDMA driver allows local users with CAP_NET_RAW to corrupt kernel memory via a uAPI request. mana_ib_create_qp_rss accepts rx_hash_key_len from userspace, and mana_ib_cfg_vport_steering passes it unchecked to memcpy, overflowing the fixed-size req->hashkey field. The raw-packet QP path and a mana RDMA device must be reachable; corruption can disclose or modify adjacent kernel memory or crash the host.

CVSS severity7.8
High
EPSS probability0.15%
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 write in the Linux Kernel mana RDMA driver allows local users with CAP_NET_RAW to corrupt kernel memory via a uAPI request. mana_ib_create_qp_rss accepts rx_hash_key_len from userspace, and mana_ib_cfg_vport_steering passes it unchecked to memcpy, overflowing the fixed-size req->hashkey field. The raw-packet QP path and a mana RDMA device must be reachable; corruption can disclose or modify adjacent kernel memory or crash the host.

The record

CVE
CVE-2026-46145
Published
May 28, 2026
Updated
May 28, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-787, T1068
Attack vector
local
Privileges
Unavailable

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=0266a177631d4c6b963b5b12dd986a8c5abdbf06 <012796f9541fcd0c1fa8ae4da7eb4d83931ef838
  2. Affected versionversion=0266a177631d4c6b963b5b12dd986a8c5abdbf06 <11c1431d641e0e4e0529e96957995820600c7287
  3. Affected versionversion=0266a177631d4c6b963b5b12dd986a8c5abdbf06 <6dd2d4ad9c8429523b1c220c5132bd551c006425
  4. Affected versionversion=0266a177631d4c6b963b5b12dd986a8c5abdbf06 <7d7c9f0fcd19c4d2f0164347c58d49cafa961b72
  5. Affected versionversion=0266a177631d4c6b963b5b12dd986a8c5abdbf06 <7d94f155f354b961c598f71bafa804dceded513f
  6. Affected versionversion=6.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linux Kernelversion=0266a177631d4c6b963b5b12dd986a8c5abdbf06 <012796f9541fcd0c1fa8ae4da7eb4d83931ef838; version=0266a177631d4c6b963b5b12dd986a8c5abdbf06 <11c1431d641e0e4e0529e96957995820600c7287; version=0266a177631d4c6b963b5b12dd986a8c5abdbf06 <6dd2d4ad9c8429523b1c220c5132bd551c006425; version=0266a177631d4c6b963b5b12dd986a8c5abdbf06 <7d7c9f0fcd19c4d2f0164347c58d49cafa961b72; version=0266a177631d4c6b963b5b12dd986a8c5abdbf06 <7d94f155f354b961c598f71bafa804dceded513f; version=6.2

Published CVSS scores

7.0redhat-SADPCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/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.

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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)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1068Exploitation for Privilege Escalation

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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