The Linux kernel’s DRM/TTM graphics memory manager contains a flaw where a backup failure triggers an infinite walk of the least‑recently‑used list. This causes the kernel to lock up CPU cycles, resulting in a denial‑of‑service as the system becomes sluggish or unresponsive. The weakness arises from improper resource cleanup on backup failure and can be mapped to CWE‑835.

Affected systems include any Linux kernel installation that does not contain commit b2ed01e7ad. This includes the Linux kernel product from vendor Linux, specifically kernel releases 7.1 rc1 through 7.1 rc3 and all earlier kernel versions before the fix.

The CVSS score of 5.5 is reported, and the EPSS score is < 1 %, indicating a very low but non‑zero exploitation probability. The flaw is not listed in CISA KEV, indicating no publicly known exploits. Based on the description, it is inferred that exploitation would require local or elevated privileges to induce a backup failure, so remote exploitation is unlikely. Nonetheless, the DoS impact could be severe for systems that rely on continuous GPU or graphics performance, treating this as a high‑severity local DoS threat.