CVE-2026-43274 Details
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().
A vulnerability allowing out-of-bounds access has been identified in the Linux kernel's mailbox component, specifically within the 'mchp-ipc-sbi' driver. This issue arises in versions of the Linux kernel prior to the latest stable release, where the 'cluster_cfg' array, dynamically allocated based on the number of online CPUs, was incorrectly indexed using 'hartid'. This could lead to accessing memory outside the array's bounds. The vulnerability has been addressed by changing the index to 'cpuid', which is always within the valid range of online CPUs.
Users can upgrade to the latest version of the Linux kernel to address this vulnerability. The patched version is available in the Linux kernel stable tree.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/0442b6229e2eedc95a6d3d18ce75dec7f5b5377c | kernel.org | Patch |
| https://git.kernel.org/stable/c/95438699c92947155823dcd3918049a07f3cd867 | kernel.org | Patch |
| https://git.kernel.org/stable/c/f7c330a8c83c9b0332fd524097eaf3e69148164d | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-125 | Out-of-bounds Read | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 6.14, < 6.18.16 >= 6.19, < 6.19.6 |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| May 8, 2026 | Initial Analysis | [email protected] |
| May 8, 2026 | CVE Modified | kernel.org |
| May 6, 2026 | New CVE Received | kernel.org |