CVE-2025-38230

In the Linux kernel, the following vulnerability has been resolved: jfs: validate AG parameters in dbMount to prevent crashes Validate dbagheight, dbagwidth, and dbagstart in dbMount to catch corrupted metadata early and avoid undefined behavior in dbAllocAG. Limits are derived from L2LPERCTL,...

CVE-2025-38230

CVE-2025-38230 concerns the Linux kernel’s JFS subsystem. The issue arises from not validating AG parameters in dbMount(), allowing corrupted metadata to reach dbAllocAG and cause crashes. A UBSAN shift-out-of-bounds occurs in fs/jfs/jfs_dmap.c:1400 during dbAllocAG, as demonstrated by the trace ...