CVE-2026-53319

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The wbt init enable default() function uses WARN ON ONCE to check for failures from wbt alloc() and wbt init(). However, these are expected failure paths: wbt alloc() may return NULL during memory pressure, and wbt init() may fail if the writeback throttling (wbt) is already registered. This can lead to spurious warnings when memory allocation failures occur during MTD partition creation via the ioctl(BLKPG) endpoint. Since wbt init enable default() is a best-effort initialization called from blk register queue(), a failure simply results in the disk operating without writeback throttling, which is harmless.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.