CVE-2026-68241

Summary

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

drm/i915/mst: limit DP MST ESI service loop

The loop in intel_dp_check_mst_status() keeps servicing interrupts originating from the sink without bound. Add an upper bound to the new interrupts occurring during interrupt processing to not get stuck on potentially stuck sink devices. Use arbitrary 32 tries to clear incoming interrupts in one go.

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

Note: The condition likely pre-dates the commit in the Fixes: tag, but this is about as far back as a backport has any chance of succeeding. Before that, the retry had a goto.

(cherry picked from commit b4ea5272133059acb493cc36599071a9e852ec2e)

Affected Software

VendorProductVersion RangeStatus
LinuxLinux3c0ec2c2d5948356a22c8f1c08a8087b12a303e7 < e3bcd3bf7eeca9570b9fa0b2f8a602c7bcc6b0d0affected
LinuxLinux3c0ec2c2d5948356a22c8f1c08a8087b12a303e7 < 9061fbf2230b6fcef042a6f637beae57c2fc93a5affected
LinuxLinux3c0ec2c2d5948356a22c8f1c08a8087b12a303e7 < 005771c18c5b2c98cb4e7517661aea460990fd3faffected
LinuxLinux5.8affected
LinuxLinux0 < 5.8unaffected
LinuxLinux6.18.42 <= 6.18.*unaffected
LinuxLinux7.1.6 <= 7.1.*unaffected
LinuxLinux7.2-rc3 <= *unaffected

Weaknesses

References