CVE-2026-43202

Service interruption via leaked DMA framebuffer memory

Published May 6, 2026 · Updated May 6, 2026

Resource leak in the Linux Kernel vt8500lcdfb driver allows local users to exhaust DMA-coherent memory through a failed device probe. vt8500lcd_probe allocates fbi->fb.screen_buffer with dma_alloc_coherent(), then its palette-allocation failure branch skips the matching dma_free_coherent() cleanup. Repeatedly reaching this hardware-specific error path consumes kernel DMA memory and can interrupt service; no data disclosure or modification is reported.

CVSS severity5.5
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource leak in the Linux Kernel vt8500lcdfb driver allows local users to exhaust DMA-coherent memory through a failed device probe. vt8500lcd_probe allocates fbi->fb.screen_buffer with dma_alloc_coherent(), then its palette-allocation failure branch skips the matching dma_free_coherent() cleanup. Repeatedly reaching this hardware-specific error path consumes kernel DMA memory and can interrupt service; no data disclosure or modification is reported.

The record

CVE
CVE-2026-43202
Published
May 6, 2026
Updated
May 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
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

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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=3.7
  2. Affected versionversion=e7b995371fe1e29838321fcdc3cfe35bb0d6bfc4 <2cd2f988a8bd2da227f5c3cfa0cbf3a9a287ddc3
  3. Affected versionversion=e7b995371fe1e29838321fcdc3cfe35bb0d6bfc4 <40c1ff25025150ff6d7ec7ad441fcfd6d070ee76
  4. Affected versionversion=e7b995371fe1e29838321fcdc3cfe35bb0d6bfc4 <778f31be5b8c10024db23fdd8a05f68a02311008
  5. Affected versionversion=e7b995371fe1e29838321fcdc3cfe35bb0d6bfc4 <88b3b9924337336a31cefbe99a22ed09401be74a
  6. Affected versionversion=e7b995371fe1e29838321fcdc3cfe35bb0d6bfc4 <9a9bc60ed372aaae9784ff8ad8e5f496ff15fd31
  7. Affected versionversion=e7b995371fe1e29838321fcdc3cfe35bb0d6bfc4 <9c3873cccb3fab54cde0605ae7093d332c99073e
  8. Affected versionversion=e7b995371fe1e29838321fcdc3cfe35bb0d6bfc4 <e8c5d5f6cd66e032f9aefdcc21b0c34761aef78a
  9. Affected versionversion=e7b995371fe1e29838321fcdc3cfe35bb0d6bfc4 <f47d5b9e8aa6178a0aaf225119ad1ec7d3f49876

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=3.7; version=e7b995371fe1e29838321fcdc3cfe35bb0d6bfc4 <2cd2f988a8bd2da227f5c3cfa0cbf3a9a287ddc3; version=e7b995371fe1e29838321fcdc3cfe35bb0d6bfc4 <40c1ff25025150ff6d7ec7ad441fcfd6d070ee76; version=e7b995371fe1e29838321fcdc3cfe35bb0d6bfc4 <778f31be5b8c10024db23fdd8a05f68a02311008; version=e7b995371fe1e29838321fcdc3cfe35bb0d6bfc4 <88b3b9924337336a31cefbe99a22ed09401be74a; version=e7b995371fe1e29838321fcdc3cfe35bb0d6bfc4 <9a9bc60ed372aaae9784ff8ad8e5f496ff15fd31; version=e7b995371fe1e29838321fcdc3cfe35bb0d6bfc4 <9c3873cccb3fab54cde0605ae7093d332c99073e; version=e7b995371fe1e29838321fcdc3cfe35bb0d6bfc4 <e8c5d5f6cd66e032f9aefdcc21b0c34761aef78a; version=e7b995371fe1e29838321fcdc3cfe35bb0d6bfc4 <f47d5b9e8aa6178a0aaf225119ad1ec7d3f49876

Published CVSS scores

5.5NIST NVDCVSS: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 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

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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