CVE-2026-68442

A flaw was found in the btrfs filesystem component of the Linux kernel. When an extent map is split, a flag EXTENTFLAGLOGGING is incorrectly propagated to the new split maps. This issue occurs because the flag clearing operation was applied to the wrong variable during the splitting process...

CVE-2026-68450

A flaw was found in the Linux kernel's btrfs filesystem. When the addrelocroot function attempts to insert a duplicate mapping node into the relocroottree, the newly allocated node is not properly freed. This oversight can lead to a memory leak, potentially causing resource exhaustion and a Denia...

CVE-2026-64567

In the Linux kernel, the following vulnerability has been resolved: btrfs: reject free space cache with more entries than pages When loading a v1 free space cache, loadfreespacecache takes numentries and numbitmaps straight from the on-disk btrfsfreespaceheader. That header is stored in the...

CVE-2026-53284

A flaw was found in the Linux kernel's Btrfs filesystem. A local user performing specific filesystem operations could trigger an error during the writing of dirty extent buffers. This improper handling of the dirty pages I/O tree can prevent unsubmitted records from being cleaned up, leading to...

PT-2026-52923

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the Btrfs file system where the dirty pages io tree is released prematurely. Within the btrfs write and wait transaction function, the system attempts to write dirty...

Astra Linux – Vulnerability in Linux 5.15

The following vulnerability has been resolved in the Linux kernel: btrfs: fixed an issue with the tree mod log handling of reallocated nodes. We have observed the following panics in production: - Kernel bug at fs/btrfs/tree-mod-log.c:677! - Invalid opcode: 0000 1 SMP - RIP:...

CVE-2026-46251

A flaw was found in the Linux kernel's Btrfs filesystem. When the EXTENTTREEV2 incompatibility flag is enabled, the block group tree's dirty list can become corrupted. This corruption occurs because the block group tree is incorrectly added to a commit list while already being tracked, leading to...

CVE-2026-46129

A flaw was found in the Linux kernel, specifically within the btrfs filesystem. This vulnerability, a double free, occurs in the createspaceinfo function's error handling path. When an internal object initialization fails, the system attempts to release memory twice for the same resource. This ca...

CVE-2026-46159

A flaw was found in the btrfs filesystem within the Linux kernel. A Time-of-check to time-of-use TOCTOU race condition in the btrfsioctlspaceinfo function allows a local attacker to exploit a timing window. This occurs when the system counts entries for allocation size and then fills a buffer, bu...

CVE-2026-46160

A flaw was found in the Linux kernel's Btrfs filesystem. This vulnerability occurs when the lastunlinktrans field is not properly updated during directory removal. If a user maintains an open file descriptor to a removed directory and subsequently performs a filesystem synchronization fsync...

UBUNTU-CVE-2026-46129

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix double free in createspaceinfo error path When kobjectinitandadd fails, the call chain is: createspaceinfo - btrfssysfsaddspaceinfotype - kobjectinitandadd - failure - kobjectput&spaceinfo-kobj - spaceinforelease -...

Linux kernel 安全漏洞

The Linux kernel is the core of the open-source operating system Linux, developed by the Linux Foundation in the United States. There is a security vulnerability in the Linux kernel, which stems from discontinuous gaps during block allocation in btrfs. This issue causes an EEXIST error in the...

Ubuntu 20.04 LTS : Linux kernel (GCP) vulnerabilities (USN-8297-1)

The remote Ubuntu 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-8297-1 advisory. Stonejiajia, Shir Tamari and Sagi Tzadik discovered that the OverlayFS implementation in the Ubuntu Linux kernel did not properly perform permission chec...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: btrfs: The BUGON functions in addnewfreespace have been removed. In addnewfreespace, there were these BUGON functions that were used to handle any failures in adding free space to the in-memory free space cache. Such failures...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerability has been resolved: btrfs: Fixed an issue where inode lists were leaked during backref walking in findparentnodes. During backref walking, when findparentnodes is called, if we are dealing with a data extent and an error occurs while resolving...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: btrfs: Protect folio::private when attaching an extent buffer for folios BUG Since version 6.8, several people have reported rare kernel crashes. The common cause is incorrect page status error messages like this: BUG: Incorrect...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: btrfs: fixed a race condition when detecting delalloc ranges during fiemap For fiemap, we recently stopped locking the target extent range for the entire duration of the fiemap call, in order to avoid a deadlock in a scenario whe...

Astra Linux – Vulnerability in Linux 5.10

A flaw was discovered in btrfsgetrootref in fs/btrfs/disk-io.c within the btrfs filesystem of the Linux kernel, due to a double decrement of the reference count. This issue may allow a local attacker with user privileges to crash the system or may lead to the leakage of internal kernel informatio...

Astra Linux – Vulnerability in Linux, Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: btrfs: fixed the issue of resolving backrefs for inline extents followed by prealloc extents. If a file consists of an inline extent followed by a regular or prealloc extent, then a legitimate attempt to resolve a logical...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: btrfs: The BUG function call has been removed after failing to insert a delayed directory index entry. Instead of calling BUG when we fail to insert a delayed directory index entry into the delayed node’s tree, we can simply...