Integer overflow in Linux kernel - CVE-2025-71305
Published: May 28, 2026
Vulnerability identifier: #VU132643
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-71305
CWE-ID: CWE-190
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to an integer underflow leading to a shift-out-of-bounds condition in drm_dp_atomic_release_time_slots in the drm/display/dp_mst subsystem when releasing DisplayPort MST timeslots after a monitor disconnect event. A local user can trigger a crafted hotplug and disconnect sequence to cause a denial of service.
The issue can occur when delayed destroy work runs after a DP 2.1 monitor is disconnected, causing the VCPI value to become 0.
How to mitigate CVE-2025-71305
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/342ccffd9f77fc29fe1c05fd145e4d842bd2feaa
- https://git.kernel.org/stable/c/3f44cdb5371faf225af37d5caba8f21ec0572469
- https://git.kernel.org/stable/c/4d2ccdea18b564e3f73e3e543854acea64e6277d
- https://git.kernel.org/stable/c/95dbd525efce2a9e9e1c50ad15213de644c85ad0
- https://git.kernel.org/stable/c/ac9a7c329a5610051fc476644c9b9145a5965ecb
- https://git.kernel.org/stable/c/d6afc7539ce06dadfa5b4787b3cfe79b95d8f67a