Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: btrfs: fixed incorrect splitting in btrfsdropextentmaprange. In production, we encountered various WARNON messages in the extentmap code, specifically in btrfsdropextentmaprange, when we had to call addextentmapping for our secon...

Astra Linux - уязвимость в u-boot

A issue was discovered in Das U-Boot during the period from 2019.07. There is an unbounded memcpy operation with a failed length check at nfsreadreply, when calling storeblock in the NFSv3 case...

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

In the Linux kernel, the following vulnerabilities have been resolved: cifs: Fixed a UAF in cifsdemultiplexthread There is a UAF when performing xfstests on cifs: BUG: KASAN: Use-after-free in smb2isnetworknamedeleted+0x27/0x160 Reading a size 4 value at address ffff88810103fc08 by task cifsd/923...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: nfsd: fixed RELEASELOCKOWNER The test on socount in nfsd4releaselockowner is pointless and harmful. revert to using checkforlocks, and change it to not sleep. Firstly, it’s harmful. As documented in the kdoc comment for...

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

In the Linux kernel, the following vulnerability has been resolved: btrfs: fixed the BUGON condition in btrfscancelbalance. Pausing and canceling balance can race to interrupt balance, leading to a BUGON panic in btrfscancelbalance. The BUGON condition in btrfscancelbalance does not take this rac...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: smb: client: Fixed the directory separator in SMB1 UNIX mounts. When calling cifsmountgettcon with SMB1 UNIX mounts, @cifssb-mntcifsflags needs to be read or updated only after calling resetcifsunixcaps. Otherwise, the...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

A NULL pointer dereference issue was discovered in the gfs2 file system within the Linux kernel. This issue occurs in corrupted gfs2 file systems when the evict code attempts to reference the journal descriptor structure after it has been freed and set to NULL. A privileged local user could explo...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerability has been resolved: mm/khugepaged: Invoking MMU notifiers in shmem/file collapse paths. Any code path that updates page table entries must invoke MMU notifiers to ensure that secondary MMUs such as those related to KVM do not continue to access page...

Astra Linux – Vulnerability in ntfs-3g

A properly crafted NTFS image can lead to a out-of-bounds read in ntfsrunlistsmergei in NTFS-3G 2021.8.22...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: f2fs: fixed to avoid potential panic during recovery. During recovery, if FAULTBLOCK is enabled, it is possible that f2fsreservenewblock will return -ENOSPC during recovery, which may trigger a panic. Additionally, if the faul...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: btrfs: Make sure that WRITTEN is set on all metadata blocks. Previously, we would call btrfscheckleaf if the checkIntegrity code was enabled. This meant that we could only perform extended leaf checks if WRITTEN was set on the...

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: NFSv4.2: fixed the NFSv4.2 kernel bug at mm/usercopy.c:102 Calling listxattr with a buffer size of 0 returns the actual size of the buffer required for a subsequent call. When size 0, nfs4listxattr does not return an error becaus...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: Revert “f2fs: block cache/dio write during f2fsenablecheckpoint”. This revert commits 196c81fdd438f7ac429d5639090a9816abb9760a. The original patch might cause a deadlock; revert it. write remount - writebegin - lockpage --- lock ...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: NFS: Check the TLS certificate fields in nfsmatchclient If the TLS security policy is of type RPCXPRTSECTLSX509, then the certserial and privkeyserial fields also need to match, as they define the client’s identity, as presented ...

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

In the Linux kernel, the following vulnerability has been resolved: f2fs: The issue was fixed by dropping all dirty pages during umount if cperror is set. The xfstest generic/361 report indicates a bug as follows: f2fsbugonsbi, sbi-fsyncnodenum; Kernel bug located at fs/f2fs/super.c:1627! RIP:...

Astra Linux – Vulnerability found in Linux 5.15, Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: NFSD: Avoid calling OPDESC with ops-opnum == OPILLEGAL OPDESC simply indexes into nfsd4ops based on the operation number, without any range checking of that value. It assumes that callers will be careful enough to avoid calling...

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

In the Linux kernel, the following vulnerability has been resolved: udf: Do not bother merging very long extents. When merging very long extents, we try to assign as much length as possible to the first extent. However, this is unnecessarily complicated and not really worth the effort. Moreover,...

Astra Linux – Vulnerability in grub2

A out-of-bounds read flaw was discovered in Grub2’s NTFS filesystem driver. This issue may allow a physically present attacker to present a specially crafted NTFS file system image to read arbitrary memory locations. A successful attack can result in sensitive data cached in memory or EFI variabl...

Astra Linux – Vulnerability in Chromium

Insufficient policy enforcement in the File System API of Google Chrome prior to version 88.0.4324.96 allowed a remote attacker to bypass filesystem restrictions through a crafted HTML page...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: netfs: Only call foliostartfscache once for each folio. If a network filesystem using netfs implements a clamplength function, it can set subrequest lengths that are smaller than the page size. When we loop through the folios in...