CVE-2025-38059 btrfs: avoid NULL pointer dereference if no valid csum tree

In the Linux kernel, the following vulnerability has been resolved: btrfs: avoid NULL pointer dereference if no valid csum tree BUG When trying read-only scrub on a btrfs with rescue=idatacsums mount option, it will crash with the following call trace: BUG: kernel NULL pointer dereference, addres...

Linux kernel 安全漏洞

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A security vulnerability exists in the Linux kernel that stems from the btrfs file system's use of the fixed value BTRFSMAXEXTENTSIZE to calculate metadata reservations, which...

Linux kernel 安全漏洞

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A security vulnerability exists in the Linux kernel that stems from ext4 triggering a warning when bmap and write compete...

PT-2025-26119 · Linux · Linux Kernel

Name of the Vulnerable Software and Affected Versions: Linux kernel affected versions not specified Description: A vulnerability in the Linux kernel has been resolved, related to the erofs filesystem. The issue occurs when the user mounts the erofs filesystem for the second time, which may cause...

PT-2025-26131 · Linux · Linux Kernel

Name of the Vulnerable Software and Affected Versions: Linux kernel affected versions not specified Description: The issue concerns the Linux kernel, specifically the ext2 filesystem. It involves adding more validity checks for inode counts to prevent crashes on corrupted filesystems. The checks...

UBUNTU-CVE-2025-6019

A Local Privilege Escalation LPE vulnerability was found in libblockdev. Generally, the "allowactive" setting in Polkit permits a physically present user to take certain actions based on the session type. Due to the way libblockdev interacts with the udisks daemon, an "allowactive" user on a syst...

CVE-2025-32797

Conda-build before 25.3.1 creates a temporary build script (conda_build.sh) with overly permissive 0o766 permissions. A local attacker with filesystem access can race between creation and execution to overwrite the script, enabling arbitrary code execution under the victim’s privileges. Fedora an...

Security update for the Linux Kernel

The SUSE Linux Enterprise 15 SP6 Azure kernel was updated to receive various security bugfixes. The following security bugs were fixed: CVE-2024-28956: x86/ibt: Keep IBT disabled during alternative patching bsc1242006. CVE-2024-46713: kabi fix for perf/aux: Fix AUX buffer serialization bsc1230581...

Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: netfs: Call invalidatecache only if implemented. Many fileystems, such as NFS and Ceph, do not implement the invalidatecache method. On these fileystems, if writing to the cache NETFSWRITETOCACHE fails for some reason, the kernel...

Astra Linux – Vulnerability found in Linux 6.1, Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: ocfs2: Properly handles errors when reading symbolic links. It’s a patch from the “Convert ocfs2 to use folios” series. Mark converted ocfs2 to use folios and sent it to me as a major patch for review ;- So I reworked it into...

Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: fs/9p: Fixed the issue of NULL pointer dereferencing when using mkdir. When a 9p tree was mounted with the posixacl option, the parent directory had a default ACL set for its subdirectories. For example: setfacl -m...

Astra Linux – Vulnerability found in Linux 6.1, Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: ocfs2: The ltreedepth field was validated to prevent out-of-bounds access. The ltreedepth field is 16-bit le16, but the actual maximum depth is limited to OCFS2MAXPATHDEPTH. A check was added to prevent out-of-bounds access if th...

Astra Linux – Vulnerability found in Linux 6.1, Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: fs/jfs: Prevent integer overflow in AG size calculation The JFS filesystem calculates the allocation group AG size using 1 bmap-dbagsize. - Subsequent block allocations will reference invalid AG structures. - This can cause: -...

Astra Linux – Vulnerability found in Linux 6.1, Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: jfs: added a sanity check for agwidth in dbMount. When the width of the AG in dmapctl is zero, it triggers a divide error when calculating the control page level in dbAllocAG. To avoid this issue, a check for agwidth must be adde...

Astra Linux – Vulnerability found in Linux 6.1, Linux 6.12

In the Linux kernel, the following vulnerabilities have been resolved: ovl: Fixed a UAF Use-After-Free in ovldentryupdatereval by moving the dput function within ovllinkup. The issue arose because dputupper was called before ovldentryupdatereval, while upper-dflags was still accessed in...

Astra Linux – Vulnerability found in Linux 6.1, Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: landlock: Handle weird files A corrupted filesystem e.g., bcachefs might return weird files. Instead of throwing a warning and allowing access to such files, treat them as regular files...

Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: ovl: Do not allow datadir alone. Theoretically, overlayfs could support upper-layer references to a data layer, but there are currently no use cases for this feature. Originally, when data-only layers were introduced, such...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: iomap: Avoid truncating the 64-bit offset to 32 bits. On 32-bit kernels, iomapwritedelallocscan inadvertently used a 32-bit position due to folionextindex returning a unsigned long value. This could lead to an infinite loop when...

Astra Linux – Vulnerability in grub2

A flaw was discovered in grub2. When performing a symlink lookup from a ReiserFS filesystem, grub’s ReiserFS module uses user-controlled parameters from the filesystem’s geometry to determine the internal buffer size. However, it improperly checks for integer overflows. A maliciously crafted...

Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: f2fs: Issue with zones: fixed to avoid inconsistencies between SIT and SSA. With the above testcase, inconsistencies may occur between SIT and SSA. Code snippet: createnullblk 512 2 1024 1024 mkfs.f2fs -m /dev/nullb0 mount...