CVE-2026-68253

drm/i915/hdcp: check streams[] bounds before overflow

State: Published
Severity: 7.8 High
Published: Aug 10, 2026
Updated: Oct 19, 2026
Reserved: Jul 30, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

drm/i915/hdcp: check streams[] bounds before overflow

The data->streams[] overflow check is done after the buffer overflow has already happened. Move the overflow check before the write.

Side note, emitting a warning splat with a backtrace might be overkill here, but prefer not changing the behaviour other than not doing the overrun.

Discovered using AI-assisted static analysis confirmed by Intel Product Security.

(cherry picked from commit 9284ab3b6e776c315883ac2611283d263c9460fd)

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

CWE-787 Out-of-bounds Write

Affected Products

Product	Versions
LinuxLinux	e03187e12cae57c09b521b6f7dd7c7f9aa2b62e9 to before 336cf6d80d41457442b659e7ba7a7badc0ffe79dAffected e03187e12cae57c09b521b6f7dd7c7f9aa2b62e9 to before 389079bf04e6f0c6f10f5b879f6d7a9cf80f0567Affected e03187e12cae57c09b521b6f7dd7c7f9aa2b62e9 to before 84351f12390349ba010920fc247e1a0b12e41eb3Affected e03187e12cae57c09b521b6f7dd7c7f9aa2b62e9 to before 2106fb490b2c6003e23ad6ff36ce823a2170e138Affected e03187e12cae57c09b521b6f7dd7c7f9aa2b62e9 to before 3d2ef8d389495e7889c6062d8bddc46d2a5fbdefAffected e03187e12cae57c09b521b6f7dd7c7f9aa2b62e9 to before 984085c5b53572e2e03fd5fc4817e86ef1effc6eAffected e03187e12cae57c09b521b6f7dd7c7f9aa2b62e9 to before bbb15a6b042d02e5508a02b4847e02d2579ee7bcAffected
LinuxLinux	5.12Affected before 5.12Not affected 5.15.217 through 5.15.Not affected 6.1.184 through 6.1.Not affected 6.6.151 through 6.6.Not affected 6.12.103 through 6.12.Not affected 6.18.42 through 6.18.Not affected 7.1.6 through 7.1.Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

e03187e12cae57c09b521b6f7dd7c7f9aa2b62e9 to before 336cf6d80d41457442b659e7ba7a7badc0ffe79dAffected
e03187e12cae57c09b521b6f7dd7c7f9aa2b62e9 to before 389079bf04e6f0c6f10f5b879f6d7a9cf80f0567Affected
e03187e12cae57c09b521b6f7dd7c7f9aa2b62e9 to before 84351f12390349ba010920fc247e1a0b12e41eb3Affected
e03187e12cae57c09b521b6f7dd7c7f9aa2b62e9 to before 2106fb490b2c6003e23ad6ff36ce823a2170e138Affected
e03187e12cae57c09b521b6f7dd7c7f9aa2b62e9 to before 3d2ef8d389495e7889c6062d8bddc46d2a5fbdefAffected
e03187e12cae57c09b521b6f7dd7c7f9aa2b62e9 to before 984085c5b53572e2e03fd5fc4817e86ef1effc6eAffected
e03187e12cae57c09b521b6f7dd7c7f9aa2b62e9 to before bbb15a6b042d02e5508a02b4847e02d2579ee7bcAffected

LinuxLinux

5.12Affected
before 5.12Not affected
5.15.217 through 5.15.*Not affected
6.1.184 through 6.1.*Not affected
6.6.151 through 6.6.*Not affected
6.12.103 through 6.12.*Not affected
6.18.42 through 6.18.*Not affected
7.1.6 through 7.1.*Not affected
7.2 and laterNot affected

References

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