CVE-2022-50408

Kernel memory corruption via transmit completion race

Published Sep 18, 2025 · Updated Sep 18, 2025

A use-after-free in the Linux kernel brcmfmac driver allows local users to corrupt kernel memory by transmitting traffic through Wi-Fi. brcmf_netdev_start_xmit reads skb->len after asynchronous transmit completion can free the socket buffer, creating a race during statistics accounting. An unprivileged local user needs traffic routed through a brcmfmac WLAN interface; successful triggering can disclose or corrupt kernel memory and crash the host.

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

A use-after-free in the Linux kernel brcmfmac driver allows local users to corrupt kernel memory by transmitting traffic through Wi-Fi. brcmf_netdev_start_xmit reads skb->len after asynchronous transmit completion can free the socket buffer, creating a race during statistics accounting. An unprivileged local user needs traffic routed through a brcmfmac WLAN interface; successful triggering can disclose or corrupt kernel memory and crash the host.

The record

CVE
CVE-2022-50408
Published
Sep 18, 2025
Updated
Sep 18, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 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 <1613a7b24f1a7467cb727ba3ec77c9a808383560
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <232d59eca07f6ea27307022a33d226aff373bd02
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <27574a3f421c3a1694d0207f37c6bbf23d66978e
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3f42faf6db431e04bf942d2ebe3ae88975723478
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <49c742afd60f552fce7799287080db02bffe1db2
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c369836cff98d3877f98c98e15c0151462812d96
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d79f4d903e14dde822c60b5fd3bedc5a289d25df
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e01d96494a9de0f48b1167f0494f6d929fa773ed

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1613a7b24f1a7467cb727ba3ec77c9a808383560; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <232d59eca07f6ea27307022a33d226aff373bd02; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <27574a3f421c3a1694d0207f37c6bbf23d66978e; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3f42faf6db431e04bf942d2ebe3ae88975723478; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <49c742afd60f552fce7799287080db02bffe1db2; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c369836cff98d3877f98c98e15c0151462812d96; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d79f4d903e14dde822c60b5fd3bedc5a289d25df; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e01d96494a9de0f48b1167f0494f6d929fa773ed

Published CVSS scores

7.8CISA ADP VulnrichmentCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1068Exploitation for Privilege Escalation

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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