Important: kernel

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: ext4: block range must be validated before use in ext4mbclearbb CVE-2022-50021 A use-after-free vulnerability in the Linux Kernel Performance Events system can be exploited to achieve local privilege escalation. T...

CVE-2023-34256

An issue was discovered in the Linux kernel before 6.3.3. There is an out-of-bounds read in crc16 in lib/crc16.c when called from fs/ext4/super.c because ext4groupdesccsum does not properly check an offset. NOTE: this is disputed by third parties because the kernel is not intended to defend again...

Amazon Linux AMI : kernel (ALAS-2023-1744)

The version of kernel installed on the remote host is prior to 4.14.314-164.533. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS-2023-1744 advisory. A use-after-free vulnerability was found in the Linux kernel's ext4 filesystem in the way it handled the extra inod...

Amazon Linux 2 : kernel (ALASKERNEL-5.4-2023-045)

The version of kernel installed on the remote host is prior to 5.4.242-155.348. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.4-2023-045 advisory. 2023-09-14: CVE-2023-2163 was added to this advisory. bpf: incorrect verifier pruning due to missing...

The vulnerability of the ext4_xattr_set_entry() function in the fs/ext4/xattr.c module of the Linux operating system allows a attacker to compromise the confidentiality, integrity, and accessibility of data.

The vulnerability of the ext4xattrsetentry function in the fs/ext4/xattr.c module of the Linux kernel is related to incorrect calculation of the available storage space for storing attributes. Exploiting this vulnerability could allow an attacker to compromise the confidentiality, integrity, and...

Amazon Linux 2 : kernel (ALASKERNEL-5.10-2023-032)

The version of kernel installed on the remote host is prior to 5.10.179-166.674. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.10-2023-032 advisory. 2023-09-14: CVE-2023-2163 was added to this advisory. bpf: incorrect verifier pruning due to missing...

A use-after-free vulnerability was found in the Linux kernel's ext4 filesystem in the way it handled the extra inode size for extended attributes. This flaw could allow a privileged local user to cause a system crash or other undefined behaviors.

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Medium: kernel

Issue Overview: bpf: incorrect verifier pruning due to missing register precision taints, which may lead to out-of-band read/write access due to an incorrect verifier conclusion. CVE-2023-2163 A use-after-free vulnerability was found in the Linux kernel's ext4 filesystem in the way it handled the...

Medium: kernel

Issue Overview: A use-after-free vulnerability was found in the Linux kernel's ext4 filesystem in the way it handled the extra inode size for extended attributes. This flaw could allow a privileged local user to cause a system crash or other undefined behaviors. CVE-2023-2513 qfqchangeclass in...

Medium: kernel

Issue Overview: bpf: incorrect verifier pruning due to missing register precision taints, which may lead to out-of-band read/write access due to an incorrect verifier conclusion. CVE-2023-2163 A use-after-free vulnerability was found in the Linux kernel's ext4 filesystem in the way it handled the...

PT-2025-37890

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description The Linux kernel contains an issue in the ext4 filesystem related to bounds checking within the get max inline xattr value size function. A corruption of the inode table can occur if...

kernel: Linux kernel ext4: Information Disclosure via uninitialized memory leak in fast-commit journal

A flaw was found in the Linux kernel. A local attacker could exploit an information disclosure vulnerability by not properly zeroing out unused space at the end of fast-commit journal blocks in the ext4 filesystem. This could lead to the leakage of uninitialized memory to disk, potentially allowi...

kernel: ext4: fix potential memory leak in ext4_fc_record_regions()

In the Linux kernel, the following vulnerability has been resolved: ext4: fix potential memory leak in ext4fcrecordregions As krealloc may return NULL, in this case 'state-fcregions' may not be freed by krealloc, but 'state-fcregions' already set NULL. Then will lead to 'state-fcregions' memory...

kernel: Linux kernel (ext4): Memory leak due to improper handling of krealloc failure

A flaw was found in the Linux kernel's ext4 filesystem. This vulnerability occurs due to improper handling of memory allocation failures when the krealloc function returns NULL within ext4fcrecordmodifiedinode. A local user could potentially exploit this flaw, leading to a memory leak. This memor...

kernel: ext4: don't set up encryption key during jbd2 transaction

A flaw exists in the ext4 filesystem implementation in the Linux kernel such that the function ext4unlink extended a journaling transaction too far so that it included a call to ext4findentry. However, ext4findentry may need to set up a directory’s encryption key — which can cause a deadlock when...

kernel: ext4: silence the warning when evicting inode with dioread_nolock

In the Linux kernel, the following vulnerability has been resolved: ext4: silence the warning when evicting inode with dioreadnolock When evicting an inode with default dioreadnolock, it could be raced by the unwritten extents converting kworker after writeback some new allocated dirty blocks. It...

kernel: ext4: fix uninititialized value in 'ext4_evict_inode'

An uninitialized variable flaw was found in the Linux kernel's ext4 filesystem in the inode eviction path. A local user can trigger this issue by creating filesystem operations that cause inode allocation to fail before the iflags field is initialized, followed by inode cleanup that attempts to...

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REJECTED CVE In the Linux kernel, the following vulnerability has been resolved: ext4: add EXT4INODEHASXATTRSPACE macro in xattr.h...

kernel: ext4: fix null-ptr-deref in ext4_write_info

In the Linux kernel, the following vulnerability has been resolved: ext4: fix null-ptr-deref in ext4writeinfo I caught a null-ptr-deref bug as follows: ================================================================== KASAN: null-ptr-deref in range 0x0000000000000068-0x000000000000006f CPU: 1 PI...

kernel: ext4: fix deadlock due to mbcache entry corruption

A deadlock vulnerability was found in the ext4 filesystem in the Linux kernel. When manipulating extended attribute xattr blocks, a race condition in non-atomic bitfield updates can cause the mbcache entry state to become corrupted. This leads to an infinite loop in ext4xattrblockset where the co...