CVE-2022-49194Network attack vector

Network-interface denial via reordered bcmgenet register access

Published Feb 26, 2025 · Updated Aug 5, 2026

A register-ordering flaw in the Linux kernel bcmgenet driver allows remote attackers to interrupt network service through packet traffic. The driver uses relaxed MMIO accessors for dependent descriptor and device-register operations, allowing GCC 12 to move reads and writes out of program order. Exposure requires an active Broadcom GENET interface running affected code; triggered systems can suffer transmit-queue timeouts and unreliable packet transmission and reception.

CVSS severity9.8
Critical
EPSS probability0.68%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A register-ordering flaw in the Linux kernel bcmgenet driver allows remote attackers to interrupt network service through packet traffic. The driver uses relaxed MMIO accessors for dependent descriptor and device-register operations, allowing GCC 12 to move reads and writes out of program order. Exposure requires an active Broadcom GENET interface running affected code; triggered systems can suffer transmit-queue timeouts and unreliable packet transmission and reception.

The record

CVE
CVE-2022-49194
Published
Feb 26, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 26, 2025CVE 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.14
  2. Affected versionversion=69d2ea9c798983c4a7157278ec84ff969d1cd8e8 <06d836801cd82ded282aaf9e888ff9e7e4a88b91
  3. Affected versionversion=69d2ea9c798983c4a7157278ec84ff969d1cd8e8 <1d717816189fd68f9e089cf89ed1f7327d2c2e71
  4. Affected versionversion=69d2ea9c798983c4a7157278ec84ff969d1cd8e8 <8d3ea3d402db94b61075617e71b67459a714a502
  5. Affected versionversion=69d2ea9c798983c4a7157278ec84ff969d1cd8e8 <b26091a02093104259ca64aeca73601e56160d62
  6. Affected versionversion=69d2ea9c798983c4a7157278ec84ff969d1cd8e8 <f49769b462f282477ca801cf648f875b1c5b59db

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.14; version=69d2ea9c798983c4a7157278ec84ff969d1cd8e8 <06d836801cd82ded282aaf9e888ff9e7e4a88b91; version=69d2ea9c798983c4a7157278ec84ff969d1cd8e8 <1d717816189fd68f9e089cf89ed1f7327d2c2e71; version=69d2ea9c798983c4a7157278ec84ff969d1cd8e8 <8d3ea3d402db94b61075617e71b67459a714a502; version=69d2ea9c798983c4a7157278ec84ff969d1cd8e8 <b26091a02093104259ca64aeca73601e56160d62; version=69d2ea9c798983c4a7157278ec84ff969d1cd8e8 <f49769b462f282477ca801cf648f875b1c5b59db

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
9.8LinuxCVSS:3.1/AV:N/AC:L/PR:N/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.

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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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