kernel: ext4: regenerate buddy after block freeing failed if under fc replay

A flaw was found in the Linux kernel's ext4 filesystem related to the fast commit replay process. During this process, blocks that are already marked as free can be incorrectly marked as free again, leading to the corruption of the buddy bitmap, which is used to track free and allocated blocks...

RHEL 9 : kernel (RHSA-2024:5066)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2024:5066 advisory. The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fixes: kernel: block: null pointer dereferenc...

Medium: kernel

Issue Overview: A flaw was found in the smb client in the Linux kernel. A potential out-of-bounds error was seen in the smb2parsecontexts function. Validate offsets and lengths before dereferencing create contexts in smb2parsecontexts. CVE-2023-52434 A null pointer dereference flaw was found in t...

CVE-2024-26601 ext4: regenerate buddy after block freeing failed if under fc replay

In the Linux kernel, the following vulnerability has been resolved: ext4: regenerate buddy after block freeing failed if under fc replay This mostly reverts commit 6bd97bf273bd "ext4: remove redundant mbregeneratebuddy" and reintroduces mbregeneratebuddy. Based on code in mbfreeblocks, fast commi...

CVE-2024-26601 ext4: regenerate buddy after block freeing failed if under fc replay

In the Linux kernel, the following vulnerability has been resolved: ext4: regenerate buddy after block freeing failed if under fc replay This mostly reverts commit 6bd97bf273bd "ext4: remove redundant mbregeneratebuddy" and reintroduces mbregeneratebuddy. Based on code in mbfreeblocks, fast commi...

CVE-2024-26601

CVE-2024-26601 is a Linux kernel vulnerability in the ext4 block allocator. The issue arises when a fast commit replay causes mb_free_blocks() to mark blocks as free that are already free, corrupting the buddy bitmap. The fix reintroduces mb_regenerate_buddy() and regenerates the buddy after a bl...