CVE-2022-49484

Local system crash via invalid PHY dereference

Published Feb 26, 2025 · Updated May 11, 2026

NULL pointer dereference in Linux kernel 5.12 through 5.18.2 allows local users to crash the system through mt7915 receive-vector processing. In mt7915_mac_fill_rx_vector, a reported band index of 1 selects a nonexistent secondary PHY and then writes test statistics through the null pointer. Reachability requires CONFIG_NL80211_TESTMODE, an mt7915 chip without DBDC support, and a receive vector reporting band index 1; the resulting kernel fault interrupts service.

CVSS severity5.5
Medium
EPSS probability0.22%
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 5.12 through 5.18.2 allows local users to crash the system through mt7915 receive-vector processing. In mt7915_mac_fill_rx_vector, a reported band index of 1 selects a nonexistent secondary PHY and then writes test statistics through the null pointer. Reachability requires CONFIG_NL80211_TESTMODE, an mt7915 chip without DBDC support, and a receive vector reporting band index 1; the resulting kernel fault interrupts service.

The record

CVE
CVE-2022-49484
Published
Feb 26, 2025
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. Feb 26, 2025CVE 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=5.12
  2. Affected versionversion=78fc30a21cf1175e97567fa5153c0efc7d955a45 <268e8ef187eb8780d021b0e4f5ffa92dee5c4983
  3. Affected versionversion=78fc30a21cf1175e97567fa5153c0efc7d955a45 <62fdc974894eec80d678523458cf99bbdb887e22

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.12; version=78fc30a21cf1175e97567fa5153c0efc7d955a45 <268e8ef187eb8780d021b0e4f5ffa92dee5c4983; version=78fc30a21cf1175e97567fa5153c0efc7d955a45 <62fdc974894eec80d678523458cf99bbdb887e22

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NVDCVSS: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 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-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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