ext4: do not BUG when INLINE_DATA_FL lacks system.data xattr
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().
02 / AFFECTED SOFTWARE
Affected packages
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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().
05 / REFERENCES
Further evidence
- https://cert-portal.siemens.com/productcert/html/ssa-032379.html
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/099b847ccc6c1ad2f805d13cfbcc83f5b6d4bc42
- https://git.kernel.org/stable/c/1199a6399895f4767f0b9a68a6ff47c3f799b7c7
- https://git.kernel.org/stable/c/279c87ef7b9da34f65c2e4db586e730b667a6fb9
- https://git.kernel.org/stable/c/2817ac83cb4732597bf36853fe13ca616f4ee4e2
- https://git.kernel.org/stable/c/7f322c12df7aeed1755acd3c6fab48c7807795fb
- https://git.kernel.org/stable/c/8085a7324d8ec448c4a764af7853e19bbd64e17a
- https://git.kernel.org/stable/c/81e7e2e7ba07e7c8cdce43ccad2f91adbc5a919c
- https://git.kernel.org/stable/c/8a6f89d42e61788605722dd9faf98797c958a7e5
- https://git.kernel.org/stable/c/d960f4b793912f35e9d72bd9d1e90553063fcbf1
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38701.json
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
- https://nvd.nist.gov/vuln/detail/CVE-2025-38701