ext4: fix OOB read when checking dotdot dir

In the Linux kernel, the following vulnerability has been resolved: e ...

Moderate: kernel security update

ELSA-2025-9302: kernel security update (MODERATE)

Moderate: kernel security update

In the Linux kernel, the following vulnerability has been resolved: cifs: Fix integer overflow while processing acregmax mount option User-provided mount parameter acregmax of type u32 is intended to have an upper limit, but before it is validated, the value is converted from seconds to jiffies which can lead to an integer overflow. Found by Linux Verification Center (linuxtesting.org) with SVACE.

ELSA-2025-8142: kernel security update (MODERATE)

Уязвимость компонента cifs ядра операционной системы Linux, позволяющая нарушителю вызвать отказ в обслуживании(DoS)

In the Linux kernel, the following vulnerability has been resolved: ext4: fix OOB read when checking dotdot dir Mounting a corrupted filesystem with directory which contains '.' dir entry with rec_len == block size results in out-of-bounds read (later on, when the corrupted directory is removed). ext4_empty_dir() assumes every ext4 directory contains at least '.' and '..' as directory entries in the first data block. It first loads the '.' dir entry, performs sanity checks by calling ext4_check_dir_entry() and then uses its rec_len member to compute the location of '..' dir entry (in ext4_next_entry). It assumes the '..' dir entry fits into the same data block. If the rec_len of '.' is precisely one block (4KB), it slips through the sanity checks (it is considered the last directory entry in the data block) and leaves "struct ext4_dir_entry_2 *de" point exactly past the memory slot allocated to the data block. The following call to ext4_check_dir_entry() on new value of de then ...

Уязвимость модуля fs/ext4/dir.c ядра операционной системы Linux, позволяющая нарушителю оказать воздействие на конфиденциальность и доступность защищаемой информации

Security update for the Linux Kernel

Security update for the Linux Kernel

Security update for the Linux Kernel

Уязвимость kernel-lt

Security update for the Linux Kernel

Уязвимость kernel-lt

Security update for the Linux Kernel

Security update for the Linux Kernel

Important: kernel security update

ELSA-2025-8643: kernel security update (IMPORTANT)