Description
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().
Affected products
linux: linux kernel; debian: debian linux
References10
- git.kernel.org/stable/c/099b847ccc6c1ad2f805d13cfbcc83f5b6d4bc42 Patch
- git.kernel.org/stable/c/1199a6399895f4767f0b9a68a6ff47c3f799b7c7 Patch
- git.kernel.org/stable/c/279c87ef7b9da34f65c2e4db586e730b667a6fb9 Patch
- git.kernel.org/stable/c/2817ac83cb4732597bf36853fe13ca616f4ee4e2 Patch
- git.kernel.org/stable/c/7f322c12df7aeed1755acd3c6fab48c7807795fb Patch
- git.kernel.org/stable/c/8085a7324d8ec448c4a764af7853e19bbd64e17a Patch
- git.kernel.org/stable/c/81e7e2e7ba07e7c8cdce43ccad2f91adbc5a919c Patch
- git.kernel.org/stable/c/8a6f89d42e61788605722dd9faf98797c958a7e5 Patch
- git.kernel.org/stable/c/d960f4b793912f35e9d72bd9d1e90553063fcbf1 Patch
- lists.debian.org/debian-lts-announce/2025/10/msg00007.html Mailing ListThird Party Advisory
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 9 · as of 8 November 2026
- CWE
- CWE-617
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.