CVE-2023-52644

Wireless service interruption via incorrect DMA queue mapping

Published Apr 17, 2024 · Updated May 11, 2026

Improper queue handling in Linux kernel b43 DMA transmission allows local users to interrupt wireless service when QoS is disabled. In the DMA transmit and status paths, b43 passes packet or ring priorities directly to mac80211 stop and wake calls although QoS-off mode instantiates only queue 0. The condition requires the b43 driver with QoS disabled; the wrong queue remains managed while the actual transmit queue is left unstopped or unwoken, interrupting wireless traffic.

CVSS severity6.3
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper queue handling in Linux kernel b43 DMA transmission allows local users to interrupt wireless service when QoS is disabled. In the DMA transmit and status paths, b43 passes packet or ring priorities directly to mac80211 stop and wake calls although QoS-off mode instantiates only queue 0. The condition requires the b43 driver with QoS disabled; the wrong queue remains managed while the actual transmit queue is left unstopped or unwoken, interrupting wireless traffic.

The record

CVE
CVE-2023-52644
Published
Apr 17, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 17, 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=2.6.26
  2. Affected versionversion=e6f5b934fba8c44c87c551e066aa7ca6fde2939e <04a2b6eff2ae1c19cb7f41e803bcbfaf94c06455
  3. Affected versionversion=e6f5b934fba8c44c87c551e066aa7ca6fde2939e <1824f942527f784a19e01eac2d9679a21623d010
  4. Affected versionversion=e6f5b934fba8c44c87c551e066aa7ca6fde2939e <31aaf17200c336fe258b70d39c40645ae19d0240
  5. Affected versionversion=e6f5b934fba8c44c87c551e066aa7ca6fde2939e <4049a9f80513a6739c5677736a4c88f96df1b436
  6. Affected versionversion=e6f5b934fba8c44c87c551e066aa7ca6fde2939e <49f067726ab01c87cf57566797a8a719badbbf08
  7. Affected versionversion=e6f5b934fba8c44c87c551e066aa7ca6fde2939e <9636951e4468f02c72cc75a82dc65d003077edbc
  8. Affected versionversion=e6f5b934fba8c44c87c551e066aa7ca6fde2939e <bc845e2e42cae95172c04bf29807c480f51a2a83
  9. Affected versionversion=e6f5b934fba8c44c87c551e066aa7ca6fde2939e <c67698325c68f8768db858f5c87c34823421746d
  10. Affected versionversion=e6f5b934fba8c44c87c551e066aa7ca6fde2939e <f1cf77bb870046a6111a604f7f7fe83d1c8c9610

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.26; version=e6f5b934fba8c44c87c551e066aa7ca6fde2939e <04a2b6eff2ae1c19cb7f41e803bcbfaf94c06455; version=e6f5b934fba8c44c87c551e066aa7ca6fde2939e <1824f942527f784a19e01eac2d9679a21623d010; version=e6f5b934fba8c44c87c551e066aa7ca6fde2939e <31aaf17200c336fe258b70d39c40645ae19d0240; version=e6f5b934fba8c44c87c551e066aa7ca6fde2939e <4049a9f80513a6739c5677736a4c88f96df1b436; version=e6f5b934fba8c44c87c551e066aa7ca6fde2939e <49f067726ab01c87cf57566797a8a719badbbf08; version=e6f5b934fba8c44c87c551e066aa7ca6fde2939e <9636951e4468f02c72cc75a82dc65d003077edbc; version=e6f5b934fba8c44c87c551e066aa7ca6fde2939e <bc845e2e42cae95172c04bf29807c480f51a2a83; version=e6f5b934fba8c44c87c551e066aa7ca6fde2939e <c67698325c68f8768db858f5c87c34823421746d; version=e6f5b934fba8c44c87c551e066aa7ca6fde2939e <f1cf77bb870046a6111a604f7f7fe83d1c8c9610

Published CVSS scores

6.3NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/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 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

No sourced classifications are available.

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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