CVE-2023-52834Network attack vector

Network denial of service via RX DMA alignment

Published May 21, 2024 · Updated Aug 5, 2026

Denial of service in the Linux atl1c Ethernet driver allows remote attackers to stop network reception with sustained inbound traffic. The receive refill path can give DMA an skb at a problematic 0x...fc0 address because it fails to reserve padding that moves the buffer away. An affected kernel must use atl1c with susceptible Atheros hardware; the interface can require a module reload or host reboot to recover.

CVSS severity7.5
High
EPSS probability0.65%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the Linux atl1c Ethernet driver allows remote attackers to stop network reception with sustained inbound traffic. The receive refill path can give DMA an skb at a problematic 0x...fc0 address because it fails to reserve padding that moves the buffer away. An affected kernel must use atl1c with susceptible Atheros hardware; the interface can require a module reload or host reboot to recover.

The record

CVE
CVE-2023-52834
Published
May 21, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.6.29
  2. Affected versionversion=43250ddd75a35d1f7926d989a10fefd30c37eaa7 <32f08b7b430ee01ec47d730f961a3306c1c7b6fb
  3. Affected versionversion=43250ddd75a35d1f7926d989a10fefd30c37eaa7 <54a6152da4993ec8e4b53dc3cf577f5a2c829afa
  4. Affected versionversion=43250ddd75a35d1f7926d989a10fefd30c37eaa7 <57e44ff9c2c9747b2b1a53556810b0e5192655d6
  5. Affected versionversion=43250ddd75a35d1f7926d989a10fefd30c37eaa7 <86565682e9053e5deb128193ea9e88531bbae9cf
  6. Affected versionversion=43250ddd75a35d1f7926d989a10fefd30c37eaa7 <c29a89b23f67ee592f4dee61f9d7efbf86d60315

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.29; version=43250ddd75a35d1f7926d989a10fefd30c37eaa7 <32f08b7b430ee01ec47d730f961a3306c1c7b6fb; version=43250ddd75a35d1f7926d989a10fefd30c37eaa7 <54a6152da4993ec8e4b53dc3cf577f5a2c829afa; version=43250ddd75a35d1f7926d989a10fefd30c37eaa7 <57e44ff9c2c9747b2b1a53556810b0e5192655d6; version=43250ddd75a35d1f7926d989a10fefd30c37eaa7 <86565682e9053e5deb128193ea9e88531bbae9cf; version=43250ddd75a35d1f7926d989a10fefd30c37eaa7 <c29a89b23f67ee592f4dee61f9d7efbf86d60315

Published CVSS scores

7.5Linux Kernel CNACVSS:3.1/AV:N/AC:L/PR:N/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.

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
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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