CVE-2024-43839

Kernel memory corruption via undersized queue-name buffers

Published Aug 17, 2024 · Updated May 11, 2026

Out-of-bounds write in the Linux bna Ethernet driver from 2.6.37 allows local users to corrupt kernel memory during queue setup. The driver writes a network-device name and numeric queue identifiers into 16-byte bna_tcb and bna_ccb name fields with unbounded sprintf calls. Triggering occurs during bna queue setup and requires a network-device name long enough for its formatted queue label to exceed the fixed field.

CVSS severity7.8
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in the Linux bna Ethernet driver from 2.6.37 allows local users to corrupt kernel memory during queue setup. The driver writes a network-device name and numeric queue identifiers into 16-byte bna_tcb and bna_ccb name fields with unbounded sprintf calls. Triggering occurs during bna queue setup and requires a network-device name long enough for its formatted queue label to exceed the fixed field.

The record

CVE
CVE-2024-43839
Published
Aug 17, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-787, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 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=2.6.37
  2. Affected versionversion=8b230ed8ec96c933047dd0625cf95f739e4939a6 <6ce46045f9b90d952602e2c0b8886cfadf860bf1
  3. Affected versionversion=8b230ed8ec96c933047dd0625cf95f739e4939a6 <6d20c4044ab4d0e6a99aa35853e66f0aed5589e3
  4. Affected versionversion=8b230ed8ec96c933047dd0625cf95f739e4939a6 <ab748dd10d8742561f2980fea08ffb4f0cacfdef
  5. Affected versionversion=8b230ed8ec96c933047dd0625cf95f739e4939a6 <b0ff0cd0847b03c0a0abe20cfa900eabcfcb9e43
  6. Affected versionversion=8b230ed8ec96c933047dd0625cf95f739e4939a6 <c90b1cd7758fd4839909e838ae195d19f8065d76
  7. Affected versionversion=8b230ed8ec96c933047dd0625cf95f739e4939a6 <c9741a03dc8e491e57b95fba0058ab46b7e506da
  8. Affected versionversion=8b230ed8ec96c933047dd0625cf95f739e4939a6 <e0f48f51d55fb187400e9787192eda09fa200ff5
  9. Affected versionversion=8b230ed8ec96c933047dd0625cf95f739e4939a6 <f121740f69eda4da2de9a20a6687a13593e72540

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.37; version=8b230ed8ec96c933047dd0625cf95f739e4939a6 <6ce46045f9b90d952602e2c0b8886cfadf860bf1; version=8b230ed8ec96c933047dd0625cf95f739e4939a6 <6d20c4044ab4d0e6a99aa35853e66f0aed5589e3; version=8b230ed8ec96c933047dd0625cf95f739e4939a6 <ab748dd10d8742561f2980fea08ffb4f0cacfdef; version=8b230ed8ec96c933047dd0625cf95f739e4939a6 <b0ff0cd0847b03c0a0abe20cfa900eabcfcb9e43; version=8b230ed8ec96c933047dd0625cf95f739e4939a6 <c90b1cd7758fd4839909e838ae195d19f8065d76; version=8b230ed8ec96c933047dd0625cf95f739e4939a6 <c9741a03dc8e491e57b95fba0058ab46b7e506da; version=8b230ed8ec96c933047dd0625cf95f739e4939a6 <e0f48f51d55fb187400e9787192eda09fa200ff5; version=8b230ed8ec96c933047dd0625cf95f739e4939a6 <f121740f69eda4da2de9a20a6687a13593e72540

Published CVSS scores

7.8NIST NVDCVSS: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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1068Exploitation for Privilege Escalation

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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