CVE-2026-68253

Kernel memory corruption via late streams bounds check

Published Aug 10, 2026 · Updated Aug 10, 2026

An out-of-bounds write in affected Linux kernel releases allows local users to corrupt kernel memory through Intel i915 HDCP stream handling. The HDCP stream enumeration path in drivers/gpu/drm/i915/display/intel_hdcp.c writes to data->streams[] before checking the array bound. Reachability requires the Intel i915 HDCP display path; the overwrite can destabilize or crash the system.

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

An out-of-bounds write in affected Linux kernel releases allows local users to corrupt kernel memory through Intel i915 HDCP stream handling. The HDCP stream enumeration path in drivers/gpu/drm/i915/display/intel_hdcp.c writes to data->streams[] before checking the array bound. Reachability requires the Intel i915 HDCP display path; the overwrite can destabilize or crash the system.

The record

CVE
CVE-2026-68253
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-787
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 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=5.12
  2. Affected versionversion=e03187e12cae57c09b521b6f7dd7c7f9aa2b62e9 <2106fb490b2c6003e23ad6ff36ce823a2170e138
  3. Affected versionversion=e03187e12cae57c09b521b6f7dd7c7f9aa2b62e9 <3d2ef8d389495e7889c6062d8bddc46d2a5fbdef
  4. Affected versionversion=e03187e12cae57c09b521b6f7dd7c7f9aa2b62e9 <84351f12390349ba010920fc247e1a0b12e41eb3
  5. Affected versionversion=e03187e12cae57c09b521b6f7dd7c7f9aa2b62e9 <984085c5b53572e2e03fd5fc4817e86ef1effc6e
  6. Affected versionversion=e03187e12cae57c09b521b6f7dd7c7f9aa2b62e9 <bbb15a6b042d02e5508a02b4847e02d2579ee7bc

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.12; version=e03187e12cae57c09b521b6f7dd7c7f9aa2b62e9 <2106fb490b2c6003e23ad6ff36ce823a2170e138; version=e03187e12cae57c09b521b6f7dd7c7f9aa2b62e9 <3d2ef8d389495e7889c6062d8bddc46d2a5fbdef; version=e03187e12cae57c09b521b6f7dd7c7f9aa2b62e9 <84351f12390349ba010920fc247e1a0b12e41eb3; version=e03187e12cae57c09b521b6f7dd7c7f9aa2b62e9 <984085c5b53572e2e03fd5fc4817e86ef1effc6e; version=e03187e12cae57c09b521b6f7dd7c7f9aa2b62e9 <bbb15a6b042d02e5508a02b4847e02d2579ee7bc

Published CVSS scores

7.8cve.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.0Red HatCVSS:3.1/AV:L/AC:H/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-787Out-of-bounds Write

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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