Bug 2343171 (CVE-2025-21667)

Summary: CVE-2025-21667 kernel: iomap: avoid avoid truncating 64-bit offset to 32 bits
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-01-31 12:01:43 UTC 
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.
Comment 1 Pedro Sampaio 2025-01-31 18:33:08 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025013158-CVE-2025-21667-a644@gregkh/T