Answer in brief
CVE-2026-43274 records a High severity (CVSS 8.4) vulnerability in mailbox: mchp-ipc-sbi: fix out-of-bounds access in mchp_ipc_get_cluster_aggr_irq(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=e4b1d67e71419c4af581890ecea84b04920d4116 <95438699c92947155823dcd3918049a07f3cd867 || >=e4b1d67e71419c4af581890ecea84b04920d4116 <0442b6229e2eedc95a6d3d18ce75dec7f5b5377c || >=e4b1d67e71419c4af581890ecea84b04920d4116 <f7c330a8c83c9b0332fd524097eaf3e69148164d | 95438699c92947155823dcd3918049a07f3cd867, 0442b6229e2eedc95a6d3d18ce75dec7f5b5377c, f7c330a8c83c9b0332fd524097eaf3e69148164d |
| Linux/Linuxgeneric | 6.14 | Not reported |
Published upstream
May 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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().
Quoted source text, attributed separately from HOL analysis.