CVE-2022-49326

Kernel crash via uninitialized transmit-ring selection

Published Feb 26, 2025 · Updated May 11, 2026

Kernel denial of service in Linux 3.15 through 5.18.2 allows local users to crash systems using rtl8180 or rtl8185 Wi-Fi cards. The rtl8180 driver indexes tx_ring with the skb priority even though QoS is unsupported and the selected ring is uninitialized with zero entries, causing a divide-by-zero panic. Reachability requires local control-port transmission through an rtl8180 or rtl8185 card; the reported consequence is a kernel crash.

CVSS severity5.5
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Kernel denial of service in Linux 3.15 through 5.18.2 allows local users to crash systems using rtl8180 or rtl8185 Wi-Fi cards. The rtl8180 driver indexes tx_ring with the skb priority even though QoS is unsupported and the selected ring is uninitialized with zero entries, causing a divide-by-zero panic. Reachability requires local control-port transmission through an rtl8180 or rtl8185 card; the reported consequence is a kernel crash.

The record

CVE
CVE-2022-49326
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-908, 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=3.15
  2. Affected versionversion=fd6564fcdc0bfcd432e6e939f9538acc3905d08a <6ad81ad0cf5744738ce94c8e64051ddd80a1734c
  3. Affected versionversion=fd6564fcdc0bfcd432e6e939f9538acc3905d08a <746285cf81dc19502ab238249d75f5990bd2d231
  4. Affected versionversion=fd6564fcdc0bfcd432e6e939f9538acc3905d08a <769ec2a824deae2f1268dfda14999a4d14d0d0c5
  5. Affected versionversion=fd6564fcdc0bfcd432e6e939f9538acc3905d08a <98e55b0b876bde3353f4e074883d66ecb55c65a3
  6. Affected versionversion=fd6564fcdc0bfcd432e6e939f9538acc3905d08a <9ad1981fc4de3afb7db3e8eb5a6a52d4c7d0d577
  7. Affected versionversion=fd6564fcdc0bfcd432e6e939f9538acc3905d08a <9d5e96cc1f1720019ce27b127a31695148d38bb0
  8. Affected versionversion=fd6564fcdc0bfcd432e6e939f9538acc3905d08a <b5dca2cd3f0239512da808598b4e70557eb4c2a1
  9. Affected versionversion=fd6564fcdc0bfcd432e6e939f9538acc3905d08a <b8ce58ab80faaea015c206382041ff3bcf5495ff
  10. Affected versionversion=fd6564fcdc0bfcd432e6e939f9538acc3905d08a <d7e30dfc166d33470bba31a42f9bbc346e5409d5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.15; version=fd6564fcdc0bfcd432e6e939f9538acc3905d08a <6ad81ad0cf5744738ce94c8e64051ddd80a1734c; version=fd6564fcdc0bfcd432e6e939f9538acc3905d08a <746285cf81dc19502ab238249d75f5990bd2d231; version=fd6564fcdc0bfcd432e6e939f9538acc3905d08a <769ec2a824deae2f1268dfda14999a4d14d0d0c5; version=fd6564fcdc0bfcd432e6e939f9538acc3905d08a <98e55b0b876bde3353f4e074883d66ecb55c65a3; version=fd6564fcdc0bfcd432e6e939f9538acc3905d08a <9ad1981fc4de3afb7db3e8eb5a6a52d4c7d0d577; version=fd6564fcdc0bfcd432e6e939f9538acc3905d08a <9d5e96cc1f1720019ce27b127a31695148d38bb0; version=fd6564fcdc0bfcd432e6e939f9538acc3905d08a <b5dca2cd3f0239512da808598b4e70557eb4c2a1; version=fd6564fcdc0bfcd432e6e939f9538acc3905d08a <b8ce58ab80faaea015c206382041ff3bcf5495ff; version=fd6564fcdc0bfcd432e6e939f9538acc3905d08a <d7e30dfc166d33470bba31a42f9bbc346e5409d5

Published CVSS scores

5.5CISA-ADPCVSS: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-908Use of Uninitialized Resource
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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