Bug 2394611 (CVE-2025-39743) - CVE-2025-39743 kernel: jfs: truncate good inode pages when hard link is 0
Summary: CVE-2025-39743 kernel: jfs: truncate good inode pages when hard link is 0
Keywords:
Status: NEW
Alias: CVE-2025-39743
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: 2025-09-11 17:02 UTC by OSIDB Bzimport
Modified: 2025-09-11 20:08 UTC (History)
0 users

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Description OSIDB Bzimport 2025-09-11 17:02:17 UTC 
In the Linux kernel, the following vulnerability has been resolved:

jfs: truncate good inode pages when hard link is 0

The fileset value of the inode copy from the disk by the reproducer is
AGGR_RESERVED_I. When executing evict, its hard link number is 0, so its
inode pages are not truncated. This causes the bugon to be triggered when
executing clear_inode() because nrpages is greater than 0.
Comment 1 Jon Moroney 2025-09-11 20:04:43 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025091139-CVE-2025-39743-75bd@gregkh/T
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