Bug 2540388 (CVE-2026-97489) - CVE-2026-97489 kernel: bfs: handle set_blocksize failures
Summary: CVE-2026-97489 kernel: bfs: handle set_blocksize failures
Keywords:
Status: NEW
Alias: CVE-2026-97489
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-24 16:38 UTC by OSIDB Bzimport
Modified: 2026-09-29 20:32 UTC (History)
17 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:


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Description OSIDB Bzimport 2026-09-24 16:38:10 UTC
In the Linux kernel, the following vulnerability has been resolved:

bfs: handle set_blocksize failures

bfs uses buffer_heads, which don't handle block size > PAGE_SIZE well.
Without this, mounting will hit the

	BUG_ON(offset >= folio_size(folio));

in folio_set_bh on the first __bread_gfp call.


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