What is CVE-2026-43274?

CVE-2026-43274 is a high-severity vulnerability in Linux, classified under Out-of-bounds Read. CVSS score: 8.4/10. Published 2026-05-06.

How severe is CVE-2026-43274?

High severity. CVSS v3 base score is 8.4 out of 10.

Out-of-bounds Read in Linux

CVE-2026-43274

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 structure…

Vulnerability class: Buffer Overflow

EPSS: 0.000 (3.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Linux — versions e4b1d67e71419c4af581890ecea84b04920d4116, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, 7.0
Linux Linux_kernel

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)

Frequently asked questions

What is CVE-2026-43274?: CVE-2026-43274 is a high-severity vulnerability in Linux, classified under Out-of-bounds Read. CVSS score: 8.4/10. Published 2026-05-06.
How severe is CVE-2026-43274?: High severity. CVSS v3 base score is 8.4 out of 10.