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

In the Linux kernel, the following vulnerability has been resolved: inotify: Avoid reporting events with an invalid wd value. When inotifyfreeingmark races with inotifyhandleinodeevent, it is possible that inotifyhandle inodeevent sees that imark-wd has already been reset to -1 and reports this...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: ext4: Fixed an uninitialized value in ‘ext4evict inode’. Syzbot identified the following issue: ===================================================== BUG: KMSAN: Uninitialized value in ext4evict inode+0xdd/0x26b0,...

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

In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: A NULL dereference in niwriteinode has been fixed. Syzbot reported a NULL dereference in niwrite inode. When creating a new inode, if the allocation fails in the miinit function called in the miformatnew function, mi-mr...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: writeback: Fixed the use of “free” after deallocating memory in inodeswitchwbsworkfn. The function inodeswitchwbsworkfn has a loop like this: c wbgetnewwb; while 1 list = llistdelall&newwb-switchwbsctxs; / Nothing to do? / if !li...

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

In the Linux kernel, the following vulnerabilities have been resolved: btrfs: The release path is checked before inode lookup during the ino lookup ioctl operation. During the ino lookup ioctl operation, we may call btrfsiget to obtain an inode reference while we are holding onto the root’s btree...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: ext4: Do not allow journal inode to have the encrypt flag Mounting a filesystem whose journal inode has the encrypt flag causes a NULL dereference in fscryptlimitioblocks when the ‘inlinecrypt’ mount option is used. The problem i...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: ext4: Fixed the issue where idisksize could exceed isize in partially written cases. It is possible for idisksize to exceed isize, triggering a warning. genericperformwrite: - copied = iovitercopyfromuseratomiclen // copied...

Astra Linux – Vulnerability in Linux, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: f2fs: A sanity check was added for the F2FSInlineDATA flag in the inode during garbage collection GC. The syzbot reports the following f2fs bug: ------------ Cut here ------------ Kernel BUG: At fs/f2fs/inline.c:258 CPU: 1 PID: 3...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerability has been resolved: btrfs: fixed an inode list leak during backref walking at resolveindirectrefs During backref walking, at resolveindirectrefs, if an error occurs, we jump to the ‘out’ label and call freeleaflist on the ‘parents’ ulist. This frees...

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 vulnerabilities have been resolved: - In blkdeviomapbegin, the EOF check has been refined. - In blkdeviomapbegin, the offset is rounded down to the logical block size before being stored in iomap-offset. It is also checked that the size remains within the inode...

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

In the Linux kernel, the following vulnerability has been resolved: fs: hfsplus: removing WARNON from hfspluscatread,writeinode. The syzbot tool encounters WARNON in hfspluscatread,writeinode, where a crafted filesystem image may contain invalid lengths. These conditions do not constitute kernel...

Astra Linux – Vulnerability in Linux, Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: ubifs: Fixed races between xattrset|get and listxattr operations. Some issues may occur when performing concurrent xattrset|get and listxattr operations, such as assertion failures, memory corruption, and stale xattr values1. The...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerability has been resolved: capabilities: Fixed a potential memory leak on the error path from vfsgetxattralloc. In capinodegetsecurity, we will use vfsgetxattralloc to complete the memory allocation of tmpbuf. If we have completed the memory allocation of...

Astra Linux – Vulnerability in Linux 5.10, Linux

A use-after-free vulnerability was discovered in the Linux kernel’s ext4 file system, particularly regarding the handling of the additional inode size for extended attributes. This flaw could allow a privileged local user to cause a system crash or other undefined behaviors...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: f2fs: Fix to wait on block writeback in the postread case. If the inode is compressed but not encrypted, the function f2fswaitonblockwriteback was not called properly to wait for the GC-ed page writeback in the IPU write path...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: fscrypt: fixed an underflow issue during left shift when inode-iblkbits PAGESHIFT When simulating an nvme device on qemu with both logicalblocksize and physicalblocksize set to 8 KiB, an error trace appears during partition...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerabilities have been resolved: ext4: Fixed a use-after-free in ext4orphancleanup. I identified the issue as follows: BUG: KASAN: Use-after-free in listaddvalid+0x28/0x1a0. Read of size 8 at address ffff88814b13f378 by task mount/710. CPU: 1 PID: 710 Comm:...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: f2fs: Flush the inode if the atomic file is aborted. We need to flush the inode that was aborted during the atomic operation, to avoid stale dirty inodes during eviction in this call stack: f2fsmarkinodedirtysync+0x22/0x40 f2f...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: f2fs: Synchronize atomic write aborts To address the race condition between atomic write aborts, I use the inode lock and ensure that the COW inode can be reused throughout the entire lifetime of the atomic file inode...