Bug 2540489 (CVE-2026-97487) - CVE-2026-97487 kernel: jfs: handle set_blocksize failures
Summary: CVE-2026-97487 kernel: jfs: handle set_blocksize failures
Keywords:
Status: NEW
Alias: CVE-2026-97487
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-24 17:00 UTC by OSIDB Bzimport
Modified: 2026-09-29 20:17 UTC (History)
17 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
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Description OSIDB Bzimport 2026-09-24 17:00:03 UTC
In the Linux kernel, the following vulnerability has been resolved:

jfs: handle set_blocksize failures

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

        BUG_ON(offset >= folio_size(folio));

in folio_set_bh on the first __bread_gfp call.


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