CVE-2022-48932

Kernel crash via mlx5 action-array overflow

Published Aug 22, 2024 · Updated Aug 5, 2026

Out-of-bounds access in Linux 5.16 through 5.16.11 allows local users to crash the kernel via a crafted mlx5 flow rule. The mlx5_cmd_dr_create_fte function allocates 32-entry action arrays but can append 32 destinations plus counter or table actions without complete bounds checks. Reaching the flaw requires local CAP_NET_ADMIN access and an mlx5 FDB software-steering configuration; remote packets alone do not trigger it.

CVSS severity5.5
Medium
EPSS probability0.19%
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 access in Linux 5.16 through 5.16.11 allows local users to crash the kernel via a crafted mlx5 flow rule. The mlx5_cmd_dr_create_fte function allocates 32-entry action arrays but can append 32 destinations plus counter or table actions without complete bounds checks. Reaching the flaw requires local CAP_NET_ADMIN access and an mlx5 FDB software-steering configuration; remote packets alone do not trigger it.

The record

CVE
CVE-2022-48932
Published
Aug 22, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125, T1499.004
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 22, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=1ffd498901c1134a7cbecf5409e12c064c39cef9 <0aec12d97b2036af0946e3d582144739860ac07b
  2. Affected versionversion=1ffd498901c1134a7cbecf5409e12c064c39cef9 <4ad319cdfbe555b4ff67bc608736c46a6930c848
  3. Affected versionversion=5.16

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=1ffd498901c1134a7cbecf5409e12c064c39cef9 <0aec12d97b2036af0946e3d582144739860ac07b; version=1ffd498901c1134a7cbecf5409e12c064c39cef9 <4ad319cdfbe555b4ff67bc608736c46a6930c848; version=5.16

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1499.004Application or System Exploitation

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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