CVE-2026-43368

Local page-fault disruption via scatterlist length overflow

Published May 8, 2026 · Updated May 8, 2026

Integer overflow in the Linux Kernel i915 GEM shmem path allows local users to truncate object backing pages with a 4 GB object. The folio-backed scatterlist builder adds page bytes to the unsigned int .length field without enforcing max_segment, so a segment reaching 4 GB wraps and ends the backing-page list prematurely. Reachability requires access to an i915 render node and a 4 GB-or-larger GEM shmem object backed by folio pages; affected mappings trigger page-fault warnings and interrupt object use.

CVSS severity7.8
High
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

Integer overflow in the Linux Kernel i915 GEM shmem path allows local users to truncate object backing pages with a 4 GB object. The folio-backed scatterlist builder adds page bytes to the unsigned int .length field without enforcing max_segment, so a segment reaching 4 GB wraps and ends the backing-page list prematurely. Reachability requires access to an i915 render node and a 4 GB-or-larger GEM shmem object backed by folio pages; affected mappings trigger page-fault warnings and interrupt object use.

The record

CVE
CVE-2026-43368
Published
May 8, 2026
Updated
May 8, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 8, 2026CVE publishedPublication date reported by the CVE source.
  2. May 8, 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=0b62af28f249b9c4036a05acfb053058dc02e2e2 <029ae067431ab9d0fca479bdabe780fa436706ea
  2. Affected versionversion=0b62af28f249b9c4036a05acfb053058dc02e2e2 <1c956f0fccc26fefcbb507516c49d1db41c40471
  3. Affected versionversion=0b62af28f249b9c4036a05acfb053058dc02e2e2 <21a301f12d18797bf889c15497f922edfdaece3a
  4. Affected versionversion=0b62af28f249b9c4036a05acfb053058dc02e2e2 <aeb7255531ba4a5c3a64938577170d08b78de399
  5. Affected versionversion=0b62af28f249b9c4036a05acfb053058dc02e2e2 <eae4bf4107571283031db96ce132e951615e2ae4
  6. Affected versionversion=6.5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=0b62af28f249b9c4036a05acfb053058dc02e2e2 <029ae067431ab9d0fca479bdabe780fa436706ea; version=0b62af28f249b9c4036a05acfb053058dc02e2e2 <1c956f0fccc26fefcbb507516c49d1db41c40471; version=0b62af28f249b9c4036a05acfb053058dc02e2e2 <21a301f12d18797bf889c15497f922edfdaece3a; version=0b62af28f249b9c4036a05acfb053058dc02e2e2 <aeb7255531ba4a5c3a64938577170d08b78de399; version=0b62af28f249b9c4036a05acfb053058dc02e2e2 <eae4bf4107571283031db96ce132e951615e2ae4; version=6.5

Published CVSS scores

7.8LinuxCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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