CVE-2026-68253

Summary

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)

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxe03187e12cae57c09b521b6f7dd7c7f9aa2b62e9 < 84351f12390349ba010920fc247e1a0b12e41eb3affected
LinuxLinuxe03187e12cae57c09b521b6f7dd7c7f9aa2b62e9 < 2106fb490b2c6003e23ad6ff36ce823a2170e138affected
LinuxLinuxe03187e12cae57c09b521b6f7dd7c7f9aa2b62e9 < 3d2ef8d389495e7889c6062d8bddc46d2a5fbdefaffected
LinuxLinuxe03187e12cae57c09b521b6f7dd7c7f9aa2b62e9 < 984085c5b53572e2e03fd5fc4817e86ef1effc6eaffected
LinuxLinuxe03187e12cae57c09b521b6f7dd7c7f9aa2b62e9 < bbb15a6b042d02e5508a02b4847e02d2579ee7bcaffected
LinuxLinux5.12affected
LinuxLinux0 < 5.12unaffected
LinuxLinux6.6.151 <= 6.6.*unaffected
LinuxLinux6.12.103 <= 6.12.*unaffected
LinuxLinux6.18.42 <= 6.18.*unaffected
LinuxLinux7.1.6 <= 7.1.*unaffected
LinuxLinux7.2-rc2 <= *unaffected

Weaknesses

References