CVE-2026-98821

A flaw was found in the Linux kernel's block layer. A local user could exploit this vulnerability to cause a denial of service DoS by initiating polled direct I/O operations combined with user integrity metadata. Because the kernel improperly attempts to poll integrity metadata as standard block...

CVE-2026-90396

A flaw was found in the Linux kernel's block direct I/O DIO subsystem. When an integrity mapping fails during direct I/O operations, a reference to the direct I/O resource is not properly released. This resource leak could potentially be exploited by a local attacker, leading to a denial of servi...

CVE-2026-92501

A flaw was found in the Linux kernel's ext4 filesystem. A race condition exists during direct I/O DIO operations when the system falls back to buffered I/O. This unprotected timing window allows concurrent I/O operations to incorrectly invalidate cached data, leading to input/output I/O errors. A...

Linux Kernel Security Vulnerabilities

The Linux kernel versions 6.16.8 to 6.17 contain security vulnerabilities. These vulnerabilities arise when user integrity metadata is combined with direct I/O polling. In this scenario, IOCBHASMETADATA reserves iocb-private as uiometa, while iocbbioiopoll treats it as bio. This leads to calls to...

SUSE CVE-2026-43161

In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Skip dev-iotlb flush for inaccessible PCIe device without scalable mode PCIe endpoints with ATS enabled and passed through to userspace e.g., QEMU, DPDK can hard-lock the host when their link drops, either by surprise...

CVE-2026-92501

CVE-2026-92501 is a race condition in the Linux kernel's ext4 filesystem, affecting the direct I/O (DIO) to buffered write fallback path in ext4_dio_write_iter(). On no-extent inodes (e.g., ext3), DIO writes to holes cause a fallback to buffered I/O. An unprotected window exists between ext4_buff...

CVE-2026-92501: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: ext4: drain in-flight DIO before buffered write fallback generic/746 started failing intermittently on ext3 no-extent inodes. The test triggers 'Page cache invalidation failure on direct I/O' warnings and subsequent fsync returns...

PT-2026-94809

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A race condition exists in the ext4 file system when handling Direct I/O DIO writes to holes on no-extent inodes. When a DIO write fails and falls back to buffered I/O, an unprotected...

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

In the Linux kernel, the following vulnerability has been resolved: ocfs2: fixed DIO failure due to insufficient transaction credits The code in ocfs2dioendiowrite estimates the number of transaction credits required using ocfs2calcextendcredits. However, this does not take into account that the ...

SUSE CVE-2026-89644

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix extent map leak in NOCOW direct I/O write btrfsdioiomapbegin calls btrfsgetextent, which returns an extent map reference that must be dropped on all exit paths. For direct writes into a NOCOW range,...

Linux Distros Unpatched Vulnerability : CVE-2026-89644

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - btrfs: fix extent map leak in NOCOW direct I/O write btrfsdioiomapbegin calls btrfsgetextent, which returns an extent map reference that must be dropped on all...

Linux Distros Unpatched Vulnerability : CVE-2026-89578

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - dm-io: clone the source bio instead of copying its biovec For DMIOBIO requests, doregion built each destination bio by walking the source bio's biovec and...

CVE-2026-89578

A flaw was found in the Linux kernel's device mapper I/O dm-io component. When handling DMIOBIO requests, incorrect sector-based accounting for misaligned direct I/O buffers could lead to an infinite loop. This issue can cause I/O operations to hang indefinitely, resulting in a denial of service...

CVE-2026-89644

A flaw was found in the Linux kernel's btrfs filesystem. When performing direct I/O writes in a NOCOW No Copy-On-Write range, an extent map reference may not be properly released if an error occurs during extent creation. This oversight can lead to an extent map leak, potentially causing memory...

DEBIAN-CVE-2026-89644

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix extent map leak in NOCOW direct I/O write btrfsdioiomapbegin calls btrfsgetextent, which returns an extent map reference that must be dropped on all exit paths. For direct writes into a NOCOW range,...

CVE-2026-89644

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix extent map leak in NOCOW direct I/O write btrfsdioiomapbegin calls btrfsgetextent, which returns an extent map reference that must be dropped on all exit paths. For direct writes into a NOCOW range,...

UBUNTU-CVE-2026-89644

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix extent map leak in NOCOW direct I/O write btrfsdioiomapbegin calls btrfsgetextent, which returns an extent map reference that must be dropped on all exit paths. For direct writes into a NOCOW range,...

CVE-2026-89644

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix extent map leak in NOCOW direct I/O write btrfsdioiomapbegin calls btrfsgetextent, which returns an extent map reference that must be dropped on all exit paths. For direct writes into a NOCOW range,...

EUVD-2026-76556

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix extent map leak in NOCOW direct I/O write btrfsdioiomapbegin calls btrfsgetextent, which returns an extent map reference that must be dropped on all exit paths. For direct writes into a NOCOW range,...

CVE-2026-89644

CVE-2026-89644 affects the btrfs filesystem in the Linux kernel. The root cause is an extent map reference leak in the NOCOW direct I/O write path: btrfs_get_blocks_direct_write() fails to drop the extent map obtained from btrfs_get_extent() when btrfs_create_dio_extent() returns an error (e.g., ...