CVE-2024-43854

MEDIUM EPSS 14.0%
Published Aug 17, 20241y ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Aug 17, 2024 1y ago
Last Modified Jun 17, 2026 2w ago

Description

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.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
14.0% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-401

Affected Products 4

VendorProductVersionRange
linuxlinux_kernel*≥2.6.27  –  <5.15.165
linuxlinux_kernel*≥5.16  –  <6.1.103
linuxlinux_kernel*≥6.2  –  <6.6.44
linuxlinux_kernel*≥6.7  –  <6.10.3

References 10

  • git.kernel.org https://git.kernel.org/stable/c/129f95948a96105c1fad8e612c9097763e88ac5f
  • git.kernel.org https://git.kernel.org/stable/c/23a19655fb56f241e592041156dfb1c6d04da644
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/3fd11fe4f20756b4c0847f755a64cd96f8c6a005
  • git.kernel.org https://git.kernel.org/stable/c/899ee2c3829c5ac14bfc7d3c4a5846c0b709b78f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9f4af4cf08f9a0329ade3d938f55d2220c40d0a6
  • git.kernel.org https://git.kernel.org/stable/c/cf6b45ea7a8df0f61bded1dc4a8561ac6ad143d2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d418313bd8f55c079a7da12651951b489a638ac1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ebc0e91ba76dc6544fff9f5b66408b1982806a00
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/23a19655fb56f241e592041156dfb1c6d04da644
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/899ee2c3829c5ac14bfc7d3c4a5846c0b709b78f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cf6b45ea7a8df0f61bded1dc4a8561ac6ad143d2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d418313bd8f55c079a7da12651951b489a638ac1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ebc0e91ba76dc6544fff9f5b66408b1982806a00
    Patch