PT-2024-30712 · Linux+10 · Linux Kernel+10
Christoph Hellwig
·
Published
2024-06-14
·
Updated
2025-09-29
·
CVE-2024-43854
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to 6.6.50
Description
The issue is related to the initialization of the integrity buffer in the Linux kernel. Metadata added by
bio integrity prep uses plain kmalloc, which leads to random kernel memory being written to media. For PI metadata, this is limited to the app tag that isn't used by kernel-generated metadata, but for non-PI metadata, the entire buffer leaks kernel memory. The fix involves adding the GFP ZERO flag to allocations for writes.Recommendations
To resolve the issue, update to Linux kernel version 6.6.50 or later. As a temporary workaround, consider restricting access to the vulnerable
bio integrity prep function until a patch is available.Exploit
Fix
Memory Leak
Found an issue in the description? Have something to add? Feel free to write us 👾
Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Almalinux
Astra Linux
Centos
Linuxmint
Linux Kernel
Red Hat
Red Os
Rocky Linux
Suse
Ubuntu