CVE-2026-43236

Local kernel compromise via stale commit pointer

Published May 6, 2026 · Updated May 6, 2026

Use-after-free in affected Linux Kernel releases allows local users to compromise kernel confidentiality, integrity, and availability. atmel_hlcdc_plane_atomic_duplicate_state copies the plane state without duplicating its drm_plane_state, leaving state->commit pointing to a released commit. Low-privileged access must close and reopen the DRM device while another client remains attached, after which the next atomic commit accesses freed kernel memory.

CVSS severity7.8
High
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in affected Linux Kernel releases allows local users to compromise kernel confidentiality, integrity, and availability. atmel_hlcdc_plane_atomic_duplicate_state copies the plane state without duplicating its drm_plane_state, leaving state->commit pointing to a released commit. Low-privileged access must close and reopen the DRM device while another client remains attached, after which the next atomic commit accesses freed kernel memory.

The record

CVE
CVE-2026-43236
Published
May 6, 2026
Updated
May 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416, 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

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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 <549c6db503dbb85dbff4840830971853feac6625
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6404898af86d986db1dbbe06177c143e40652e49
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <796e77c14c4c1e2cd36473760fb6cc66c695eb47
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7b4d0fab3ff2c00c6d34e1952c9df5129a826aee
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a205740a7231e967ac77cb731171642901c327af
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ac2d898da5095d46bd1ff8585fdd753d58ad91e7
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <bc847787233277a337788568e90a6ee1557595eb
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fd4a4d0711f48a99b25bcd45e00eef8339eff82d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <549c6db503dbb85dbff4840830971853feac6625; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6404898af86d986db1dbbe06177c143e40652e49; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <796e77c14c4c1e2cd36473760fb6cc66c695eb47; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7b4d0fab3ff2c00c6d34e1952c9df5129a826aee; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a205740a7231e967ac77cb731171642901c327af; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ac2d898da5095d46bd1ff8585fdd753d58ad91e7; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <bc847787233277a337788568e90a6ee1557595eb; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fd4a4d0711f48a99b25bcd45e00eef8339eff82d

Published CVSS scores

7.8kernel.orgCVSS: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 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-416Use After Free
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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