CVE-2026-98996

The Linux kernel contains a vulnerability in the propagate_mount_busy() helper function, which fails to correctly identify busy mounts during synchronous unmounting. Due to a logic mismatch with the propagate_umount() function, the kernel may skip reference checks on mount copies that have two or...

EUVD-2026-108790

In the Linux kernel, the following vulnerability has been resolved: fs: don't silently unmount busy mounts The propagatemountbusy helper exists to decide whether a synchronous can suceed. It does that by looking at the copies of the victims in the mounts its parent propagates to. One of those...

CVE-2026-98996 fs: don't silently unmount busy mounts

In the Linux kernel, the following vulnerability has been resolved: fs: don't silently unmount busy mounts The propagatemountbusy helper exists to decide whether a synchronous can suceed. It does that by looking at the copies of the victims in the mounts its parent propagates to. One of those...

CVE-2026-98990

In the Linux kernel, the following vulnerability has been resolved: namespace: check a submount for references right before unmounting it shrinksubmounts and markmountsforexpiry first collect all the mounts they are allowed to unmount and then unmount them. Whether a mount is busy is decided by...

EUVD-2026-108888

In the Linux kernel, the following vulnerability has been resolved: fs: avoid repeated scans in evictinodes We observed hung tasks when users attempted to unmount a filesystem after its disk had been removed while still in use. During device removal, fsbdevmarkdead calls evictinodes while holding...

CVE-2026-98924 fs: avoid repeated scans in evict_inodes()

In the Linux kernel, the following vulnerability has been resolved: fs: avoid repeated scans in evictinodes We observed hung tasks when users attempted to unmount a filesystem after its disk had been removed while still in use. During device removal, fsbdevmarkdead calls evictinodes while holding...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: btrfs: Fixed a hang that occurred during unmount when the block group reclaim task was running. When starting an unmount, at closectree, if the reclaim task is running and is in the middle of a data block group relocation, a...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: btrfs: fixed the qgroup reserve leaks in cowfilerange. In the buffered write path, the dirty page owns the qgroup reserve until it creates an orderedextent. Therefore, any errors that occur before the orderedextent is created...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: vfs: Do not leak disconnected dentrys during umount When the user calls openbyhandleat on an inode that is not cached, we will create a disconnected dentry for it. If such a dentry is a directory, exportfsdecodefhraw will attempt...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-5.15, Linux-6.1

In the Linux kernel, the following vulnerabilities have been resolved: nilfs2: Fix for a use-after-free of the timer for the log writer thread This patch series, titled “nilfs2: Fix for log writer-related issues”, addresses three issues related to the nilfs2 log writer. These include a...

Astra Linux – Vulnerability in Linux 5.10, Linux, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: nilfs2: A use-after-free bug in nilfsroot has been fixed in nilfsevictinode. During the unmount process of nilfs2, nothing holds the nilfsroot structure after nilfs2 detaches its writer in nilfsdetachlogwriter. However, since...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: f2fs: Fix for use-after-free of sbi in f2fscompresswriteendio In f2fscompresswriteendio, the call to decpagecountsbi, type can set the F2FSWBCPDATA counter to zero, thereby unblocking f2fswaitonallpages in f2fsputsuper during a...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: gfs2: Fixed a rare race condition in gdlmputlock In gdlmputlock, there is a short period of time during which the DFLUNMOUNT flag is set, but the lockspace has not yet been released. During that period, dlm may still call gdlmast...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-5.15, Linux-6.1

In the Linux kernel, the following vulnerability has been resolved: nilfs2: A potential hang occurred in nilfsdetachlogwriter. Syzbot reported a potential hang during nilfsdetachlogwriter called when nilfs2 unmounts the file system. Analysis revealed that this issue arises because nilfssegctorsyn...

Astra Linux – Vulnerability found in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: btrfs: fixed a hang that occurred during unmount when stopping a space reclaim worker Often, when running the generic/562 test from fstests, a hang may occur during unmount, resulting in a log message like this: Sep 07 11:52:0...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: xfs: Stop reclaiming resources before pushing AIL during unmount. The unmount sequence in xfsunmountFlushInodes pushes AIL while background reclaim and inodegc are still running. This behavior is incorrect—it happens regardless o...

CVE-2026-90236

A flaw was found in the Network File System Daemon NFSD of the Linux kernel. This vulnerability occurs due to an improper handling of export references when reaping open state IDs. An unreleased reference can pin an export, preventing the file system from being unmounted. This could allow a local...

Astra Linux – Vulnerability found in Linux 6.1, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: smb: Client: Fixed a use-after-free in cifsoplockbreak. A race condition can occur in cifsoplockbreak, leading to a use-after-free of the cinode structure when unmounting: c cifsoplockbreak cifsFileInfoputcfile cifsFileInfoputfin...

Astra Linux – Vulnerability found in Linux 6.1, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: ext4: Fixed a use-after-free in updatesuperwork when racing with unmount. The commit b98535d09179 “ext4: fix bugon in startthishandle during umount filesystem” moved ext4unregistersysfs before flushing ssbupdwork to prevent new...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: btrfs: Wait for fixup workers before stopping the cleaner kthread during umount. During unmount, at closectree, we follow these steps in this order: 1 Park the cleaner kthread – this does not destroy the kthread; it simply hal...