CVE-2022-49022

Kernel-memory disclosure and crash via unchecked rate index

Published Oct 21, 2024 · Updated Aug 5, 2026

An out-of-bounds read in the Linux mac80211 subsystem allows physically proximate attackers to read kernel data or crash the host over Wi-Fi. ieee80211_get_rate_duration uses the receive-status rate_idx to index a 12-entry duration array without first enforcing the MCS_GROUP_RATES bound. The path is reachable through adjacent, unauthenticated Wi-Fi traffic during airtime accounting; it supplies no write primitive, but an invalid index can disclose kernel memory or cause a kernel oops.

CVSS severity7.8
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An out-of-bounds read in the Linux mac80211 subsystem allows physically proximate attackers to read kernel data or crash the host over Wi-Fi. ieee80211_get_rate_duration uses the receive-status rate_idx to index a 12-entry duration array without first enforcing the MCS_GROUP_RATES bound. The path is reachable through adjacent, unauthenticated Wi-Fi traffic during airtime accounting; it supplies no write primitive, but an invalid index can disclose kernel memory or cause a kernel oops.

The record

CVE
CVE-2022-49022
Published
Oct 21, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-129, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 21, 2024CVE 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

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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=5.5
  2. Affected versionversion=db3e1c40cf2f973fbdd52ae0b59a9472b1c04f4a <0184ede0ec61b9cd075babfaa45081b1bf322234
  3. Affected versionversion=db3e1c40cf2f973fbdd52ae0b59a9472b1c04f4a <3e8f7abcc3473bc9603323803aeaed4ffcc3a2ab
  4. Affected versionversion=db3e1c40cf2f973fbdd52ae0b59a9472b1c04f4a <59b54f0563b6546c94bdb6823d3b382c75407019
  5. Affected versionversion=db3e1c40cf2f973fbdd52ae0b59a9472b1c04f4a <f0fcad4c7201ecfaa17357f4ce0c50b4708df22d

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.5; version=db3e1c40cf2f973fbdd52ae0b59a9472b1c04f4a <0184ede0ec61b9cd075babfaa45081b1bf322234; version=db3e1c40cf2f973fbdd52ae0b59a9472b1c04f4a <3e8f7abcc3473bc9603323803aeaed4ffcc3a2ab; version=db3e1c40cf2f973fbdd52ae0b59a9472b1c04f4a <59b54f0563b6546c94bdb6823d3b382c75407019; version=db3e1c40cf2f973fbdd52ae0b59a9472b1c04f4a <f0fcad4c7201ecfaa17357f4ce0c50b4708df22d

Published CVSS scores

7.8NIST National Vulnerability DatabaseCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-129Improper Validation of Array Index
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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