CVE-2022-50062Network attack vector

Kernel crash via bgmac queue accounting race

Published Jun 18, 2025 · Updated Aug 5, 2026

Race condition in the Linux bgmac driver allows remote attackers to crash the kernel by triggering concurrent receive activity. When an RX interrupt occurs after bgmac sets ring->end but before netdev_sent_queue(), bgmac_dma_tx_free() miscalculates the completed byte count and trips the dql_completed() BUG_ON. Exposure requires a system using the Broadcom bgmac driver; successful triggering produces a kernel Oops and interrupts service without reported data disclosure or modification.

CVSS severity7.5
High
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in the Linux bgmac driver allows remote attackers to crash the kernel by triggering concurrent receive activity. When an RX interrupt occurs after bgmac sets ring->end but before netdev_sent_queue(), bgmac_dma_tx_free() miscalculates the completed byte count and trips the dql_completed() BUG_ON. Exposure requires a system using the Broadcom bgmac driver; successful triggering produces a kernel Oops and interrupts service without reported data disclosure or modification.

The record

CVE
CVE-2022-50062
Published
Jun 18, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-617, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 18, 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=4.1
  2. Affected versionversion=b38c83dd08665a93e439c4ffd9eef31bc098a6ea <1b7680c6c1f6de9904f1d9b05c952f0c64a03350
  3. Affected versionversion=b38c83dd08665a93e439c4ffd9eef31bc098a6ea <ab2b55bb25db289ba0b68e3d58494476bdb1041d
  4. Affected versionversion=b38c83dd08665a93e439c4ffd9eef31bc098a6ea <ac6d4482f29ab992b605c1b4bd1347f1f679f4e4
  5. Affected versionversion=b38c83dd08665a93e439c4ffd9eef31bc098a6ea <c506c9a97120f43257e9b3ce7b1f9a24eafc3787
  6. Affected versionversion=b38c83dd08665a93e439c4ffd9eef31bc098a6ea <da1421a29d3b8681ba6a7f686bd0b40dda5acaf3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.1; version=b38c83dd08665a93e439c4ffd9eef31bc098a6ea <1b7680c6c1f6de9904f1d9b05c952f0c64a03350; version=b38c83dd08665a93e439c4ffd9eef31bc098a6ea <ab2b55bb25db289ba0b68e3d58494476bdb1041d; version=b38c83dd08665a93e439c4ffd9eef31bc098a6ea <ac6d4482f29ab992b605c1b4bd1347f1f679f4e4; version=b38c83dd08665a93e439c4ffd9eef31bc098a6ea <c506c9a97120f43257e9b3ce7b1f9a24eafc3787; version=b38c83dd08665a93e439c4ffd9eef31bc098a6ea <da1421a29d3b8681ba6a7f686bd0b40dda5acaf3

Published CVSS scores

7.5kernel.orgCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.5CanonicalCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NIST NVDCVSS: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.

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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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-617Reachable Assertion
T1499Endpoint Denial of Service

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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