CVE-2023-53254

HIGH EPSS 3.6%
Published Sep 15, 20259mo ago · Modified Jun 17, 20262w ago
7.1 CVSS 3.1
High
Find Similar
Published Sep 15, 2025 9mo ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: cacheinfo: Fix shared_cpu_map to handle shared caches at different levels The cacheinfo sets up the shared_cpu_map by checking whether the caches with the same index are shared between CPUs. However, this will trigger slab-out-of-bounds access if the CPUs do not have the same cache hierarchy. Another problem is the mismatched shared_cpu_map when the shared cache does not have the same index between CPUs. CPU0 I D L3 index 0 1 2 x ^ ^ ^ ^ index 0 1 2 3 CPU1 I D L2 L3 This patch checks each cache is shared with all caches on other CPUs.

CVSS Details

Base Score
7.1
Exploitability
1.8
Impact
5.2
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
3.6% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-125 Out-of-bounds Read Memory Safety

Affected Products 2

VendorProductVersionRange
linuxlinux_kernel* <6.1.18
linuxlinux_kernel*≥6.2  –  <6.2.5

References 3

  • git.kernel.org https://git.kernel.org/stable/c/198102c9103fc78d8478495971947af77edb05c1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2f588d0345d69a35e451077afed428fd057a5e34
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/dea49f2993f57d8a2df2cacb0bf649ef49b28879
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/198102c9103fc78d8478495971947af77edb05c1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2f588d0345d69a35e451077afed428fd057a5e34
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/dea49f2993f57d8a2df2cacb0bf649ef49b28879
    Patch