CVE-2023-53328 in Linux
Сводка
по VulDB • 27.05.2026
Based on the kernel stack trace provided, here is an analysis of the issue:
### **Summary** This is a **KASAN (Kernel Address Sanitizer)** report indicating a **memory safety violation** (likely a use-after-free, out-of-bounds access, or invalid memory access) occurring within the **NTFS3 filesystem driver** (`ntfs3`) when setting an extended attribute (`setxattr`).
The crash happens in `path_setxattr` → `ntfs_setxattr` → `ntfs_set_ea` → `ni_insert_resident` → `ni_insert_attr` → `path_setxattr`.
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### **Key Components in the Stack Trace**
1. **`path_setxattr`**: The VFS layer function for setting extended attributes. 2. **`ntfs_setxattr`**: The NTFS3-specific implementation of `setxattr`. 3. **`ntfs_set_ea`**: Handles the actual Extended Attribute (EA) insertion logic. 4. **`ni_insert_resident`**: Inserts the EA into the resident (on-disk) attribute list. 5. **`ni_insert_attr`**: Low-level function that inserts the attribute structure. 6. **`__x64_sys_setxattr`**: The system call entry point.
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### **Likely Cause** The NTFS3 driver is attempting to insert an extended attribute into a file's resident attribute list, but it encounters an invalid memory state. Common causes include:
- **Use-After-Free**: The attribute structure or its parent inode was freed before this operation completed. - **Out-of-Bounds Access**: The code is reading/writing beyond the allocated buffer for the EA list. - **Corrupted In-Memory Structure**: The NTFS inode (`ni`) or its attribute list is corrupted due to a previous bug or disk corruption. - **Race Condition**: Concurrent modifications to the same file’s attributes without proper locking.
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### **Debugging Steps**
1. **Reproduce with Debug Info**: - Enable `CONFIG_KASAN` and `CONFIG_NTFS3_DEBUG` if available. - Use `kasan=on` kernel parameter for detailed error reports.
2. **Check for Disk Corruption**: - Run `ntfsfix` or `chkdsk` on the NTFS volume to rule out on-disk corruption.
3. **Review Recent Changes**: - If this is a recent regression, check git commits related to `ntfs3` EA handling.
4. **Minimal Reproduction**: - Try setting a small EA on a newly created file: ```bash setfattr -n user.test -v "data" /mnt/ntfs/testfile ``` - If it crashes consistently, it’s likely a driver bug.
5. **Kernel Logs**: - Check `dmesg` for additional KASAN details (e.g., "BUG: KASAN: use-after-free in ...").
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### **Workaround** - **Avoid setting EAs** on NTFS3 volumes until the bug is fixed. - **Update the kernel** to the latest version, as this may have been patched. - **Use a different filesystem** (e.g., ext4, xfs) if EA support is critical.
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### **Conclusion** This is a **kernel bug in the NTFS3 driver**. Report it to the Linux kernel mailing list (`[email protected]`) or the NTFS3 maintainer (`@ntfs3` on GitHub) with the full KASAN report and reproduction steps.
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