Threats tagged 'ghsa-5fqc-9jpf-8wjm'

A vulnerability in the Linux kernel's memory management subsystem (filemap) was resolved, addressing an integer overflow in the nr_pages calculation within filemap_map_pages(). This overflow could cause the kernel to map beyond the size of a large folio, potentially corrupting memory management metadata such as page mapcounts. The issue was reproducible under stress-ng on Arm64 with kernel v7.0-rc3 and involved race conditions between file mapping and inode size truncation. The fix involves recalculating the file end offset before retrieving folios to maintain consistency and prevent overflow.