CVE-2026-43142

Memory exhaustion via unreleased firmware buffers

Published May 6, 2026 · Updated May 6, 2026

Memory leakage in the Linux Kernel Iris Gen1 media driver allows local users to waste kernel memory through repeated resolution changes. In iris_hfi_gen1_session_unset_buffers(), the driver waits for the firmware release response but fails to call iris_destroy_internal_buffer(), leaving stale allocations. Local low-privileged access to the Iris video device is required; replacement buffers accumulate while stale allocations persist until session close.

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

Memory leakage in the Linux Kernel Iris Gen1 media driver allows local users to waste kernel memory through repeated resolution changes. In iris_hfi_gen1_session_unset_buffers(), the driver waits for the firmware release response but fails to call iris_destroy_internal_buffer(), leaving stale allocations. Local low-privileged access to the Iris video device is required; replacement buffers accumulate while stale allocations persist until session close.

The record

CVE
CVE-2026-43142
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

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=6.15
  2. Affected versionversion=73702f45db81b74897b2808aaa13484826156006 <1dabf00ee206eceb0f08a1fe5d1ce635f9064338
  3. Affected versionversion=73702f45db81b74897b2808aaa13484826156006 <7cde76db8883ec8a3d1456068079ecadbfb15ca5
  4. Affected versionversion=73702f45db81b74897b2808aaa13484826156006 <d4457f23ac0130240053a34be663f0fade3bb371

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.15; version=73702f45db81b74897b2808aaa13484826156006 <1dabf00ee206eceb0f08a1fe5d1ce635f9064338; version=73702f45db81b74897b2808aaa13484826156006 <7cde76db8883ec8a3d1456068079ecadbfb15ca5; version=73702f45db81b74897b2808aaa13484826156006 <d4457f23ac0130240053a34be663f0fade3bb371

Published CVSS scores

4.8SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
3.3SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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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