Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerabilities have been resolved: jffs2: fixed a memory leak in jffs2domountfs. If jffs2buildfilesystem in jffs2domountfs returns an error, we can observe the following kmemleak report: -------------------------------------------- unreferenced object...

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: afs: Fixed the maximum cell name length. The kafs filesystem limits the maximum length of a cell to 256 bytes. However, a problem arises when someone attempts to create a directory under /proc/net/afs/ with the name of a cell. Th...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: ext4: Reject mounting if bigalloc with sfirstdatablock != 0. bigalloc with sfirstdatablock != 0 is not supported; mounting will be rejected...

Astra Linux – Vulnerability in cifs-utils

In cifs-utils up to version 6.14, a stack-based buffer overflow occurs when parsing the mount.cifs ip= command-line argument. This vulnerability could allow local attackers to gain root privileges...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerabilities have been resolved: nilfs2: Fixed a shift-out-of-bounds/overflow issue in nilfssb2badoffset. The patch series “nilfs2: Fix UBSAN shift-out-of-bounds warnings during mount time” addresses this issue. The first patch fixes a bug reported by syzbot,...

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: f2fs: added a sanity check on sitbitmapsize. With the above testcase, resizing will generate a corrupted image that contains inconsistent metadata. Therefore, when mounting such an image, it will trigger a kernel panic. Steps to...

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: f2fs: The return value of f2fsrecoverfsyncdata has been fixed. With the following scripts, a panic will occur in f2fs: bash mkfs.f2fs -f /dev/vdd mount /dev/vdd /mnt/f2fs touch /mnt/f2fs/foo sync echo 111 /mnt/f2fs/foo f2fsio fsy...

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

In the Linux kernel, the following vulnerability has been resolved: ext2: Check block size validity during mount It is necessary to ensure that the value of the block size recorded in the superblock is valid. Otherwise, the shift operation used to calculate the block size may overflow, resulting ...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerability has been resolved: gfs2: Check sbbsizeshift after reading the superblock. Fuzzers often modify sbbsizeshift, but in reality it’s very unlikely that this field would be corrupted on its own. Nevertheless, it should still be checked to avoid potentia...

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: legitimizemnt. The check for MNTSYNCUMOUNT should be performed under mountlock. … Otherwise, we risk stealing the final mntput from sync umount. This occurs after umount2 verifies that the victim is not busy, but before it sets...

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: Fixed a hang issue in nilfslookupdirtydatabuffers. Syzbot reported a hang issue in migratepagesbatch, called by mbind, and nilfslookupdirtydatabuffers, called in the log writer of nilfs2. While migratepagesbatch locks ...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerabilities have been resolved: jffs2: fixed a memory leak in jffs2scanmedium If an error is returned in jffs2scaneraseblock, and some memory is added to the jffs2summary s, we can observe the following kmemleak report:...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: “landlock”: Fixed the “dparent” walk. The WARNONONCE function in “collectdomainaccesses” can be triggered when trying to link a root mount point. This does not actually work in practice because this directory is already mounted,...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: f2fs: fixed the issue where preallocated blocks were truncated in f2fsfileopen. Chenyuwen has reported the following f2fs bugs: Unable to handle a NULL pointer dereferencing at the virtual address 0000000000000011...

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

In the Linux kernel, the following vulnerability has been resolved: ocfs2: Fixed the nullptrdereference error when the journal load failed. During the mounting process, if the journal function fails due to a too-short journal, it causes jbd2journalload to fail with a NULL jsbbuffer. Subsequently,...

Astra Linux – Vulnerability in Linux, Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: ocfs2: Mounting fails due to a buffer overflow in strlen. Starting with kernel 5.11, when building with CONFIGFORTIFYSOURCE, mounting an ocfs2 filesystem using either o2cb or pcmk cluster stack will fail. The issue seems to be th...

Astra Linux – Vulnerability found in Linux 6.1, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: cloneprivatemnt: Make sure that the caller has CAPSYSADMIN in the correct user namespaces. What we want is to ensure that clone does not expose something hidden by a mount that we wouldn’t be able to undo. “ wouldn’t be able to...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: btrfs: Do not log conflicting inodes if it’s a directory that was moved during the current transaction. We cannot log an conflicting inode if it’s a directory that was moved from one parent directory to another parent directory...

Astra Linux – Vulnerability in sshfs-fuse

SSHFS is a network filesystem client for connecting to SSH servers. From version 1.4 up to 3.7.6, SSHFS accepts a bracketed mount source such as -oProxyCommand=CMD:/path. The findbasepath function removes the brackets, leaving a host value that starts with a “-” and is passed directly to ssh as a...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: Fixed a NULL dereference in ntfsupdatemftmirr. If ntfsfillsuper is not called, then sbi-sb will be equal to NULL. The code should check this pointer before dereferencing it. The Syzbot encountered this issue by passing...