CVE-2023-54285: Linux Kernel

High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: iomap: Fix possible overflow condition in iomap_write_delalloc_scan folio_next_index() returns an unsigned long value which left shifted by PAGE_SHIFT could possibly cause an overflow on 32-bit system. Instead use folio_pos(folio) + folio_size(folio), which does this correctly.

Affected products

• Linux Linux Kernel: from 6.1.92, before 6.1.162 (fixed in 6.1.162); from 6.2, before 6.5.5 (fixed in 6.5.5)

Published 2025-12-30. Last modified 2026-08-04.