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CVE Record

CVE-2022-49404: RDMA/hfi1: Fix potential integer multiplication overflow errors

In the Linux kernel, the following vulnerability has been resolved: RDMA/hfi1: Fix potential integer multiplication overflow errors When multiplying of different types, an overflow is possible even when storing the result in a larger type. This is because the conversion is done after the multiplication. So arithmetic overflow and thus in incorrect value is possible. Correct an instance of this in the inter packet delay calculation. Fix by ensuring one of the operands is u64 which will promote the other to u64 as well ensuring no overflow.

MediumCVSS 5.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This is a Linux kernel RDMA/hfi1 flaw where a math overflow can produce an incorrect delay calculation. The published impact is availability only, requiring local low-privileged access. Business urgency is moderate and highest for Linux systems that use hfi1 RDMA functionality.

Executive priority

Treat as a moderate infrastructure maintenance item. It is not flagged as exploited, but affected RDMA-capable Linux systems could face availability risk. Patch through normal kernel update processes, with faster handling for production hosts that rely on hfi1 RDMA paths.

Technical view

CVE-2022-49404 is a CWE-190 integer overflow in Linux kernel RDMA/hfi1 inter-packet delay calculation. Multiplication could overflow before promotion to a wider type. The kernel fix promotes an operand to u64 before multiplication. CVSS is 5.5, local attack vector, low complexity, low privileges, no confidentiality or integrity impact, high availability impact.

Likely exposure

Exposure appears limited to affected Linux kernels where RDMA/hfi1 code is present and relevant. The source lists Linux kernel versions and stable commits, but does not provide distribution-specific package names or deployment prevalence. Prioritize systems using RDMA/hfi1 over general-purpose Linux hosts.

Exploitation context

The CVE record does not indicate known active exploitation, and KEV status is false in the supplied bundle. Exploitation is scored as local with low privileges and no user interaction. The documented impact is denial of service or availability loss, not data theft or privilege escalation.

Researcher notes

Evidence is limited to the CVE record and Linux stable commit references. The bug is an integer promotion issue during inter-packet delay calculation. The sources do not provide proof-of-concept details, affected distribution packages, or operational mitigations beyond the code fix.

Mitigation direction

  • Update to a vendor-supported Linux kernel containing the referenced stable fixes.
  • Use distribution advisories to map CVE-2022-49404 to package versions.
  • Prioritize remediation on hosts using RDMA/hfi1 functionality.
  • If hfi1 is unnecessary, check vendor guidance for safe driver removal or disablement.

Validation and detection

  • Inventory Linux kernel versions across affected server fleets.
  • Identify hosts where RDMA/hfi1 modules or functionality are present.
  • Compare installed kernels with vendor advisories for CVE-2022-49404.
  • Confirm patched kernels include the stable fix for RDMA/hfi1 overflow handling.
  • Run regression checks for RDMA-dependent workloads after kernel updates.
Prepared
Confidence
high
Sources
11

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

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · low confidence lookup

CWE-190: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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cve · low confidence lookup

CVE-2022-49404 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.5 (3.1)
Known Exploited
No
Published

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

1CVSS vectors
3Timeline events
1ADP providers
10Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

CVSS vector scores

1 official score

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
5.5CVSS 3.1MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H1.83.6CISA-ADP

Vulnerability scoring details

Base CVSS 3.1 score

5.5Medium
CVSS 3.1 vector shape for CVE-2022-49404Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

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

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
cvssV3_1other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux7724105686e718ac476a6ad3304fea2fbcfcffde, 7724105686e718ac476a6ad3304fea2fbcfcffde, 7724105686e718ac476a6ad3304fea2fbcfcffde, 7724105686e718ac476a6ad3304fea2fbcfcffde, 7724105686e718ac476a6ad3304fea2fbcfcffde, 7724105686e718ac476a6ad3304fea2fbcfcffde, 7724105686e718ac476a6ad3304fea2fbcfcffde, 7724105686e718ac476a6ad3304fea2fbcfcffde, 7724105686e718ac476a6ad3304fea2fbcfcffdeunaffected
LinuxLinux4.3, 0, 4.9.318, 4.14.283, 4.19.247, 5.4.198, 5.10.121, 5.15.46, 5.17.14, 5.18.3, 5.19affected
Weakness

CWE details

CWE-190

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

CWE-190 · source CWE mapping

Integer Overflow or Wraparound

Integer Overflow or Wraparound represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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