CVE-2022-50258

Stack out-of-bounds read via unterminated firmware string

Published Sep 15, 2025 · Updated Sep 15, 2025

Out-of-bounds read in the Linux brcmfmac Wi-Fi driver allows local users to read past a stack buffer via a firmware response. brcmf_fil_iovar_data_get copies the firmware version into buf without guaranteed termination, and brcmf_c_preinit_dcmds passes it to strsep. Triggering occurs while a Broadcom USB Wi-Fi device is initialized; the public record demonstrates the invalid read but no reliable disclosure, crash, or code execution.

CVSS severity7.8
High
EPSS probability0.16%
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 read in the Linux brcmfmac Wi-Fi driver allows local users to read past a stack buffer via a firmware response. brcmf_fil_iovar_data_get copies the firmware version into buf without guaranteed termination, and brcmf_c_preinit_dcmds passes it to strsep. Triggering occurs while a Broadcom USB Wi-Fi device is initialized; the public record demonstrates the invalid read but no reliable disclosure, crash, or code execution.

The record

CVE
CVE-2022-50258
Published
Sep 15, 2025
Updated
Sep 15, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 2025Record 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0a06cadcc2a0044e4a117cc0e61436fc3a0dad69
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <17dbe90e13f52848c460d253f15b765038ec6dc0
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3a3a5e3f94068cd562d62a57da6983c8cd07d53c
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <881f50d76c3892262730ddf5c894eb00310e736c
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <89243a7b0ea19606ba1c2873c9d569026ccb344f
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ba166e0ebdde3dfa833f0a3edaf2b2934d4a87f7
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d481fd6064bf215d7c5068e15aa390c3b16c9cd0
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d6ef66194bb4a6c18f5b9649bf62597909b040e4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0a06cadcc2a0044e4a117cc0e61436fc3a0dad69; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <17dbe90e13f52848c460d253f15b765038ec6dc0; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3a3a5e3f94068cd562d62a57da6983c8cd07d53c; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <881f50d76c3892262730ddf5c894eb00310e736c; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <89243a7b0ea19606ba1c2873c9d569026ccb344f; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ba166e0ebdde3dfa833f0a3edaf2b2934d4a87f7; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d481fd6064bf215d7c5068e15aa390c3b16c9cd0; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d6ef66194bb4a6c18f5b9649bf62597909b040e4

Published CVSS scores

7.8CanonicalCVSS:3.1/AV:L/AC:L/PR:L/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.

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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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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