CVE-2024-46852

HIGH EPSS 11.8%
Published Sep 27, 20241y ago · Modified Jun 17, 20261w ago
7.8 CVSS 3.1
High
Find Similar
Published Sep 27, 2024 1y ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: dma-buf: heaps: Fix off-by-one in CMA heap fault handler Until VM_DONTEXPAND was added in commit 1c1914d6e8c6 ("dma-buf: heaps: Don't track CMA dma-buf pages under RssFile") it was possible to obtain a mapping larger than the buffer size via mremap and bypass the overflow check in dma_buf_mmap_internal. When using such a mapping to attempt to fault past the end of the buffer, the CMA heap fault handler also checks the fault offset against the buffer size, but gets the boundary wrong by 1. Fix the boundary check so that we don't read off the end of the pages array and insert an arbitrary page in the mapping.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
11.8% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-193

Affected Products 12

VendorProductVersionRange
debiandebian_linux11.0any
linuxlinux_kernel*≥5.11  –  <5.15.168
linuxlinux_kernel*≥5.16  –  <6.1.111
linuxlinux_kernel*≥6.2  –  <6.6.52
linuxlinux_kernel*≥6.7  –  <6.10.11
linuxlinux_kernel6.11any
linuxlinux_kernel6.11any
linuxlinux_kernel6.11any
linuxlinux_kernel6.11any
linuxlinux_kernel6.11any
linuxlinux_kernel6.11any
linuxlinux_kernel6.11any

References 6

  • git.kernel.org https://git.kernel.org/stable/c/79cce5e81d20fa9ad553be439d665ac3302d3c95
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/84175dc5b2c932266a50c04e5ce342c30f817a2f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e79050882b857c37634baedbdcf7c2047c24cbff
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ea5ff5d351b520524019f7ff7f9ce418de2dad87
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/eb7fc8b65cea22f9038c52398c8b22849e9620ea
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
    Mailing ListThird Party Advisory

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/79cce5e81d20fa9ad553be439d665ac3302d3c95
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/84175dc5b2c932266a50c04e5ce342c30f817a2f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e79050882b857c37634baedbdcf7c2047c24cbff
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ea5ff5d351b520524019f7ff7f9ce418de2dad87
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/eb7fc8b65cea22f9038c52398c8b22849e9620ea
    Patch