CVE-2026-43274

HIGH EPSS 3.0%
Published May 6, 20261mo ago · Modified Jun 17, 20262w ago
8.4 CVSS 3.1
High
Find Similar
Published May 6, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: mailbox: mchp-ipc-sbi: fix out-of-bounds access in mchp_ipc_get_cluster_aggr_irq() The cluster_cfg array is dynamically allocated to hold per-CPU configuration structures, with its size based on the number of online CPUs. Previously, this array was indexed using hartid, which may be non-contiguous or exceed the bounds of the array, leading to out-of-bounds access. Switch to using cpuid as the index, as it is guaranteed to be within the valid range provided by for_each_online_cpu().

CVSS Details

Base Score
8.4
Exploitability
2.5
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
3.0% 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*≥6.14  –  <6.18.16
linuxlinux_kernel*≥6.19  –  <6.19.6

References 3

  • git.kernel.org https://git.kernel.org/stable/c/0442b6229e2eedc95a6d3d18ce75dec7f5b5377c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/95438699c92947155823dcd3918049a07f3cd867
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f7c330a8c83c9b0332fd524097eaf3e69148164d
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/0442b6229e2eedc95a6d3d18ce75dec7f5b5377c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/95438699c92947155823dcd3918049a07f3cd867
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f7c330a8c83c9b0332fd524097eaf3e69148164d
    Patch