CVE-2026-43283

Kernel memory corruption via incorrect DMA handle

Published May 6, 2026 · Updated May 6, 2026

Memory corruption in the ec_bhf Ethernet driver in the Linux Kernel allows local users to corrupt kernel memory through a failed open. The ec_bhf_open() cleanup path supplies rx_buf.alloc_len as the DMA handle to dma_free_coherent() instead of the allocation's rx_buf.alloc_phys handle. The path is reached only after receive-buffer initialization fails; public sources do not identify a reliable trigger or a more specific post-corruption outcome.

CVSS severity8.8
High
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in the ec_bhf Ethernet driver in the Linux Kernel allows local users to corrupt kernel memory through a failed open. The ec_bhf_open() cleanup path supplies rx_buf.alloc_len as the DMA handle to dma_free_coherent() instead of the allocation's rx_buf.alloc_phys handle. The path is reached only after receive-buffer initialization fails; public sources do not identify a reliable trigger or a more specific post-corruption outcome.

The record

CVE
CVE-2026-43283
Published
May 6, 2026
Updated
May 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 6, 2026CVE publishedPublication date reported by the CVE source.
  2. May 6, 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=3.15
  2. Affected versionversion=6af55ff52b02d492d45db88df3e461fa51a6f753 <0f589ee54fd6d76d3f75e745f7f12c64cbd749e5
  3. Affected versionversion=6af55ff52b02d492d45db88df3e461fa51a6f753 <1b1371cd4032ae859838ebc74215f569987bb197
  4. Affected versionversion=6af55ff52b02d492d45db88df3e461fa51a6f753 <1b1d3c5d58a80a19d017a409aa2308162bab5bbf
  5. Affected versionversion=6af55ff52b02d492d45db88df3e461fa51a6f753 <1e300c33ef3cc544c2b9c693778fe9490cfe9184
  6. Affected versionversion=6af55ff52b02d492d45db88df3e461fa51a6f753 <7e54ff938bebb173822b4c38b33fc164c1cabf92
  7. Affected versionversion=6af55ff52b02d492d45db88df3e461fa51a6f753 <8320727be7ff704e07c87624efc2a4a75f54b3ce
  8. Affected versionversion=6af55ff52b02d492d45db88df3e461fa51a6f753 <accd0599bc8e73b962247c6c6c70ca7aa1f8e8d0
  9. Affected versionversion=6af55ff52b02d492d45db88df3e461fa51a6f753 <ffe68c3766997d82e9ccaf1cdbd47eba269c4aa2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=3.15; version=6af55ff52b02d492d45db88df3e461fa51a6f753 <0f589ee54fd6d76d3f75e745f7f12c64cbd749e5; version=6af55ff52b02d492d45db88df3e461fa51a6f753 <1b1371cd4032ae859838ebc74215f569987bb197; version=6af55ff52b02d492d45db88df3e461fa51a6f753 <1b1d3c5d58a80a19d017a409aa2308162bab5bbf; version=6af55ff52b02d492d45db88df3e461fa51a6f753 <1e300c33ef3cc544c2b9c693778fe9490cfe9184; version=6af55ff52b02d492d45db88df3e461fa51a6f753 <7e54ff938bebb173822b4c38b33fc164c1cabf92; version=6af55ff52b02d492d45db88df3e461fa51a6f753 <8320727be7ff704e07c87624efc2a4a75f54b3ce; version=6af55ff52b02d492d45db88df3e461fa51a6f753 <accd0599bc8e73b962247c6c6c70ca7aa1f8e8d0; version=6af55ff52b02d492d45db88df3e461fa51a6f753 <ffe68c3766997d82e9ccaf1cdbd47eba269c4aa2

Published CVSS scores

8.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/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 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

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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