CVE-2022-48876

Kernel crash via uninitialized mac80211 link pointer

Published Aug 21, 2024 · Updated May 11, 2026

NULL pointer dereference in Linux kernel 6.1 through 6.1.7 allows local users to crash the kernel through mac80211 fast-rx. The fast-rx path can call __ieee80211_rx_h_amsdu without initializing rx->link_sta, while later delivery code assumes it is valid whenever rx->sta is valid. Exploitation requires local privileges and a mac80211 receive path that reaches A-MSDU handling; the bounded consequence is a kernel crash and service interruption.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Linux kernel 6.1 through 6.1.7 allows local users to crash the kernel through mac80211 fast-rx. The fast-rx path can call __ieee80211_rx_h_amsdu without initializing rx->link_sta, while later delivery code assumes it is valid whenever rx->sta is valid. Exploitation requires local privileges and a mac80211 receive path that reaches A-MSDU handling; the bounded consequence is a kernel crash and service interruption.

The record

CVE
CVE-2022-48876
Published
Aug 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 21, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=6.1
  2. Affected versionversion=ccdde7c74ffd7e8bdd3cf685bbfa41231c8e3131 <a57c981d9f24d2bd89eaa76dc477e8ca252e22e8
  3. Affected versionversion=ccdde7c74ffd7e8bdd3cf685bbfa41231c8e3131 <e66b7920aa5ac5b1a1997a454004ba9246a3c005

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.1; version=ccdde7c74ffd7e8bdd3cf685bbfa41231c8e3131 <a57c981d9f24d2bd89eaa76dc477e8ca252e22e8; version=ccdde7c74ffd7e8bdd3cf685bbfa41231c8e3131 <e66b7920aa5ac5b1a1997a454004ba9246a3c005

Published CVSS scores

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.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
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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