Bug 2393156 (CVE-2025-38701) - CVE-2025-38701 kernel: ext4: do not BUG when INLINE_DATA_FL lacks system.data xattr
Summary: CVE-2025-38701 kernel: ext4: do not BUG when INLINE_DATA_FL lacks system.data...
Keywords:
Status: NEW
Alias: CVE-2025-38701
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: 2025-09-04 16:01 UTC by OSIDB Bzimport
Modified: 2025-09-30 18:59 UTC (History)
0 users

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Description OSIDB Bzimport 2025-09-04 16:01:28 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ext4: do not BUG when INLINE_DATA_FL lacks system.data xattr

A syzbot fuzzed image triggered a BUG_ON in ext4_update_inline_data()
when an inode had the INLINE_DATA_FL flag set but was missing the
system.data extended attribute.

Since this can happen due to a maiciouly fuzzed file system, we
shouldn't BUG, but rather, report it as a corrupted file system.

Add similar replacements of BUG_ON with EXT4_ERROR_INODE() ii
ext4_create_inline_data() and ext4_inline_data_truncate().
Comment 1 Jon Moroney 2025-09-04 20:10:55 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025090453-CVE-2025-38701-691e@gregkh/T
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