CVE-2026-99102 ntfs: take invalidate_lock in ntfs_setattr_size()
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-99102?
CVE-2026-99102 is a vulnerability in Linux, published on 28 Oct 2026.
Official description
In the Linux kernel, the following vulnerability has been resolved:
ntfs: take invalidate_lock in ntfs_setattr_size()
ntfs_setattr_size() updates i_size and resizes the on-disk attribute without holding mapping->invalidate_lock. Page faults take the lock shared, so a fault racing the resize can resolve a VCN against the transient runlist state of ntfs_non_resident_attr_expand() and fail with a spurious SIGBUS, and can interleave with the size-change epilogue (truncate_pagecache(), i_size_write(), pagecache_isize_extended()).
Take invalidate_lock exclusively around the whole resize after inode_dio_wait(), matching the fallocate path and other filesystems such as xfs, which wraps truncate in its mmaplock (= invalidate_lock).
Which versions are affected by CVE-2026-99102?
How do I fix CVE-2026-99102?
Upgrade to a fixed version.
Is CVE-2026-99102 being exploited?
There is no known exploitation of CVE-2026-99102 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-99102, GHSA-pchj-j532-7cm6, UBUNTU-CVE-2026-99102.