LinuxVULNRICHMENT:CVE-2024-43854CVE-2024-43854 block: initialize integrity buffer to zero before writing it to media
In the Linux kernel, the following vulnerability has been resolved:
block: initialize integrity buffer to zero before writing it to media
Metadata added by bio_integrity_prep is using plain kmalloc, which leads
to random kernel memory being written 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.
Fix this by adding the __GFP_ZERO flag to allocations for writes.
References
git.kernel.org/stable/c/129f95948a96105c1fad8e612c9097763e88ac5f
git.kernel.org/stable/c/23a19655fb56f241e592041156dfb1c6d04da644
git.kernel.org/stable/c/3fd11fe4f20756b4c0847f755a64cd96f8c6a005
git.kernel.org/stable/c/899ee2c3829c5ac14bfc7d3c4a5846c0b709b78f
git.kernel.org/stable/c/9f4af4cf08f9a0329ade3d938f55d2220c40d0a6
git.kernel.org/stable/c/cf6b45ea7a8df0f61bded1dc4a8561ac6ad143d2
git.kernel.org/stable/c/d418313bd8f55c079a7da12651951b489a638ac1
git.kernel.org/stable/c/ebc0e91ba76dc6544fff9f5b66408b1982806a00
Related
AI Score
Confidence
Low
SSVC
Exploitation
none
Automatable
no
Technical Impact
partial