CVE-2025-21667: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: iomap: avoid avoid truncating 64-bit offset to 32 bits on 32-bit kernels, iomap_write_delalloc_scan() was inadvertently using a 32-bit position due to folio_next_index() returning an unsigned long. This could lead to an infinite loop when writing to an xfs filesystem.

Affected products

• Linux Linux Kernel: before 6.1.127 (fixed in 6.1.127); from 6.2, before 6.6.74 (fixed in 6.6.74); from 6.7, before 6.12.11 (fixed in 6.12.11); version 6.13 only

Published 2025-01-31. Last modified 2026-06-17.