CVE-2022-50869 fs/ntfs3: Fix slab-out-of-bounds in r_page
A slab-out-of-bounds write in the Linux kernel NTFS3 driver allows attackers to cause denial of service or potentially execute code via crafted filesystem images.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2022-50869?
CVE-2022-50869 is a high-severity memory corruption vulnerability in Linux, published on 30 Dec 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
In the Linux kernel, the following vulnerability has been resolved:
fs/ntfs3: Fix slab-out-of-bounds in r_page
When PAGE_SIZE is 64K, if read_log_page is called by log_read_rst for the first time, the size of *buffer would be equal to DefaultLogPageSize(4K).But for *buffer operations like memcpy, if the memory area size(n) which being assigned to buffer is larger than 4K (log->page_size(64K) or bytes(64K-page_off)), it will cause an out of boundary error. Call trace: [...] kasan_report+0x44/0x130 check_memory_region+0xf8/0x1a0 memcpy+0xc8/0x100 ntfs_read_run_nb+0x20c/0x460 read_log_page+0xd0/0x1f4 log_read_rst+0x110/0x75c log_replay+0x1e8/0x4aa0 ntfs_loadlog_and_replay+0x290/0x2d0 ntfs_fill_super+0x508/0xec0 get_tree_bdev+0x1fc/0x34c [...]
Fix this by setting variable r_page to NULL in log_read_rst.
Which versions are affected by CVE-2022-50869?
How do I fix CVE-2022-50869?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2022-50869 being exploited?
There is no known exploitation of CVE-2022-50869 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2022-50869, GHSA-qq73-f9v2-mjmw, UBUNTU-CVE-2022-50869.