CVE-2026-43274
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().
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 0 |
| debian | bullseye | fixed | 0 |
| debian | forky | fixed | 6.19.6-1 |
| debian | sid | fixed | 6.19.6-1 |
| debian | trixie | fixed | 0 |
| linux-kernel | affected | 6.18.16 | |
| windows | affected | |
References
- https://git.kernel.org/stable/c/0442b6229e2eedc95a6d3d18ce75dec7f5b5377c
- https://git.kernel.org/stable/c/95438699c92947155823dcd3918049a07f3cd867
- https://git.kernel.org/stable/c/f7c330a8c83c9b0332fd524097eaf3e69148164d
- https://www.suse.com/security/cve/CVE-2026-43274.html
- https://security-tracker.debian.org/tracker/CVE-2026-43274
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-43274
CWEs
CWE-125
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.