CVE-2026-46117

Kernel corruption via shared completion queues

Published May 28, 2026 · Updated May 28, 2026

Improper input validation in the Linux Kernel RDMA/mana driver allows local users to corrupt kernel memory through its userspace API. The mana_ib_create_qp_rss() path fails to reject work queues that share one completion queue, triggers WARN_ON(), and continues into kernel corruption. Low-privileged local access to the RDMA/mana userspace API and a usable MANA RDMA device are required; the reported consequence is kernel corruption.

CVSS severity7.8
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in the Linux Kernel RDMA/mana driver allows local users to corrupt kernel memory through its userspace API. The mana_ib_create_qp_rss() path fails to reject work queues that share one completion queue, triggers WARN_ON(), and continues into kernel corruption. Low-privileged local access to the RDMA/mana userspace API and a usable MANA RDMA device are required; the reported consequence is kernel corruption.

The record

CVE
CVE-2026-46117
Published
May 28, 2026
Updated
May 28, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-1288, CWE-617
Attack vector
local
Privileges
authenticated

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=6.8
  2. Affected versionversion=c15d7802a42402a87880a17eee89ff023e49ecc0 <159f2efabc89d3f931d38f2d35876535d4abf0a3
  3. Affected versionversion=c15d7802a42402a87880a17eee89ff023e49ecc0 <9cc0c6b1ba8cd5c55aef043e1384de0a8b4efa71
  4. Affected versionversion=c15d7802a42402a87880a17eee89ff023e49ecc0 <9ef65af26b2a6738bf15812042e84b3112402d3a
  5. Affected versionversion=c15d7802a42402a87880a17eee89ff023e49ecc0 <db991ba50087ad99fa12a2c483aa3be19671ea73

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.8; version=c15d7802a42402a87880a17eee89ff023e49ecc0 <159f2efabc89d3f931d38f2d35876535d4abf0a3; version=c15d7802a42402a87880a17eee89ff023e49ecc0 <9cc0c6b1ba8cd5c55aef043e1384de0a8b4efa71; version=c15d7802a42402a87880a17eee89ff023e49ecc0 <9ef65af26b2a6738bf15812042e84b3112402d3a; version=c15d7802a42402a87880a17eee89ff023e49ecc0 <db991ba50087ad99fa12a2c483aa3be19671ea73

Published CVSS scores

7.0OracleCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8Linux kernel CNACVSS: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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1288Improper Validation of Consistency within Input
CWE-617Reachable Assertion

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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