Bug 2426179 (CVE-2023-54285) - CVE-2023-54285 kernel: iomap: Fix possible overflow condition in iomap_write_delalloc_scan
Summary: CVE-2023-54285 kernel: iomap: Fix possible overflow condition in iomap_write_...
Keywords:
Status: NEW
Alias: CVE-2023-54285
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security DevOps Team
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Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-12-30 13:14 UTC by OSIDB Bzimport
Modified: 2025-12-31 03:33 UTC (History)
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Description OSIDB Bzimport 2025-12-30 13:14:33 UTC 
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.
Comment 1 Alexander B 2025-12-31 03:30:35 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025123027-CVE-2023-54285-edc0@gregkh/T
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