CVE-2026-43269

Service interruption via unreleased DRM commit objects

Published May 6, 2026 · Updated May 6, 2026

A memory leak in the Atmel HLCDC DRM driver in Linux Kernel allows local users to exhaust kernel memory through repeated display commits. The atmel_hlcdc_plane_atomic_destroy_state callback releases only the framebuffer instead of all plane-state objects, leaving drm_crtc_commit allocations referenced. Reaching the flaw requires local low-privilege access to issue repeated DRM modeset ioctls on a system using the Atmel HLCDC driver; sustained activity can exhaust slab memory and interrupt service.

CVSS severity5.5
Medium
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A memory leak in the Atmel HLCDC DRM driver in Linux Kernel allows local users to exhaust kernel memory through repeated display commits. The atmel_hlcdc_plane_atomic_destroy_state callback releases only the framebuffer instead of all plane-state objects, leaving drm_crtc_commit allocations referenced. Reaching the flaw requires local low-privilege access to issue repeated DRM modeset ioctls on a system using the Atmel HLCDC driver; sustained activity can exhaust slab memory and interrupt service.

The record

CVE
CVE-2026-43269
Published
May 6, 2026
Updated
May 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-401, 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <082271e364a3205598c2e4e6233a9f49ce7941cf
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <25e832a7830740e72103eb0b527680a4b64bbcb3
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3e64e78f4a70e3f6ac8fe5a7071f08ffd25a2489
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5718d98976ad6b9700e5a6afec67fc47a8a92580
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <57fa3487acfa3467405f8506b94682abd96e7393
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6d4e91ab97fda64e8cf9c8881cc3b4da026bd849
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ec40702029b08ee8d5f5b03303d64a10e74a957b
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f12352471061df83a36edf54bbb16284793284e4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <082271e364a3205598c2e4e6233a9f49ce7941cf; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <25e832a7830740e72103eb0b527680a4b64bbcb3; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3e64e78f4a70e3f6ac8fe5a7071f08ffd25a2489; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5718d98976ad6b9700e5a6afec67fc47a8a92580; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <57fa3487acfa3467405f8506b94682abd96e7393; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6d4e91ab97fda64e8cf9c8881cc3b4da026bd849; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ec40702029b08ee8d5f5b03303d64a10e74a957b; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f12352471061df83a36edf54bbb16284793284e4

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

CWE-401Missing Release of Memory after Effective Lifetime
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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