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CVE Record

CVE-2026-46117: RDMA/mana: Remove user triggerable WARN_ON() in mana_ib_create_qp_rss()

In the Linux kernel, the following vulnerability has been resolved: RDMA/mana: Remove user triggerable WARN_ON() in mana_ib_create_qp_rss() Sashiko points out that the user can specify WQs sharing the same CQ as a part of the uAPI and this will trigger the WARN_ON() then go on to corrupt the kernel. Just reject it outright and fail the QP creation.

HighCVSS 7.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

A locally authenticated user with access to the Linux MANA RDMA interface may trigger unsafe kernel behavior, causing kernel memory corruption. Successful exploitation could compromise confidentiality, integrity, and availability of the host. Exposure depends on the affected kernel code and MANA RDMA functionality being available.

Executive priority

Prioritize affected multi-user, cloud, or compute hosts exposing MANA RDMA to less-trusted workloads. Patch promptly through normal emergency or high-severity kernel maintenance. Hosts without the affected driver path have lower immediate urgency, but applicability must be verified rather than assumed.

Technical view

The mana_ib_create_qp_rss() path accepted work queues sharing one completion queue. This user-controlled configuration triggered a WARN_ON() and execution continued into kernel corruption. The upstream resolution rejects the invalid configuration and fails queue-pair creation. CVSS 3.1 is 7.8: local, low complexity, low privileges, no user interaction, with high impacts.

Likely exposure

Highest risk applies to affected Linux kernels where the MANA RDMA driver and its userspace API are accessible to untrusted local users. The supplied version data identifies affected releases but contains ambiguous entries, so administrators should confirm applicability against their distribution advisory and installed kernel build.

Exploitation context

This is a local, low-privilege vulnerability rather than a directly remote flaw. The bundle reports no CISA KEV listing and provides no evidence of active exploitation. Exploitation would require access to the relevant RDMA userspace interface and could lead to kernel compromise or system failure.

Researcher notes

The core failure is continued execution after a user-triggerable WARN_ON(), followed by kernel corruption. The fix validates that work queues do not share the same completion queue. The supplied affected-version list is not a clear set of fixed ranges and includes duplicated commit identifiers; distribution-level package status should therefore govern remediation decisions.

Mitigation direction

  • Install the fixed kernel package provided by the operating-system vendor.
  • Review the listed Red Hat advisories for applicable product-specific updates.
  • Until patched, restrict untrusted local access to MANA RDMA interfaces where operationally feasible.
  • Reboot into the updated kernel and retire vulnerable kernel packages according to change policy.

Validation and detection

  • Record the running kernel version and compare it with the distribution's CVE advisory.
  • Confirm whether MANA RDMA functionality is present, enabled, and accessible to untrusted users.
  • Verify the installed kernel contains the vendor fix corresponding to the referenced stable commits.
  • After updating, confirm the host is running the fixed kernel rather than an older installed build.
Prepared
Confidence
medium
Sources
10

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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cwe · low confidence lookup

CWE-1288: Exact CWE lookup

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CVE-2026-46117 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.8 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

2CVSS vectors
5Timeline events
1ADP providers
12Source links

CVSS vector scores

2 official scores

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7.8CVSS 3.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9Linux
7CVSS 3.1HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H15.9redhat-SADP

Vulnerability scoring details

Base CVSS 3.1 score

7.8High
CVSS 3.1 vector shape for CVE-2026-46117Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. ADP timelineredhat-SADP

    Reported to Red Hat.

  3. ADP timelineredhat-SADP

    Made public.

  4. CVE publishedCVE Program

    The CVE record was published.

  5. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

redhat-SADPkernel: RDMA/mana: Remove user triggerable WARN_ON() in mana_ib_create_qp_rss()
other:Red Hat severity ratingcvssV3_1
  • 2026-05-28T00:00:00.000Z: Reported to Red Hat.
  • 2026-05-28T00:00:00.000Z: Made public.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxc15d7802a42402a87880a17eee89ff023e49ecc0, c15d7802a42402a87880a17eee89ff023e49ecc0, c15d7802a42402a87880a17eee89ff023e49ecc0, c15d7802a42402a87880a17eee89ff023e49ecc0unaffected
LinuxLinux6.8, 0, 6.12.91, 6.18.30, 7.0.7, 7.1affected
Weakness

CWE details

CWE-1288

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-1288 · source CWE mapping

Improper Validation of Consistency within Input

Improper Validation of Consistency within Input represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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