CVE-2026-43274
published 2026-05-06CVE-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…
PriorityP341high8.4CVSS 3.1
AVLACLPRNUINSUCHIHAH
EPSS
0.13%
3.0th percentile
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().
Affected
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| linux | linux | — | — |
| linux | linux | >= e4b1d67e71419c4af581890ecea84b04920d4116 < 95438699c92947155823dcd3918049a07f3cd867 | 95438699c92947155823dcd3918049a07f3cd867 |
| linux | linux | >= e4b1d67e71419c4af581890ecea84b04920d4116 < 0442b6229e2eedc95a6d3d18ce75dec7f5b5377c | 0442b6229e2eedc95a6d3d18ce75dec7f5b5377c |
| linux | linux | >= e4b1d67e71419c4af581890ecea84b04920d4116 < f7c330a8c83c9b0332fd524097eaf3e69148164d | f7c330a8c83c9b0332fd524097eaf3e69148164d |
| linux | linux_kernel | >= 6.14 < 6.18.16 | 6.18.16 |
| linux | linux_kernel | >= 6.19 < 6.19.6 | 6.19.6 |
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GHSA
GHSA-w4mh-vmr5-87jc: 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(
ghsa_unreviewed·2026-05-06
CVE-2026-43274 GHSA-w4mh-vmr5-87jc: 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(
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().
Red Hat
kernel: mailbox: mchp-ipc-sbi: fix out-of-bounds access in mchp_ipc_get_cluster_aggr_irq()
vendor_redhat·2026-05-06
CVE-2026-43274 CWE-1285 kernel: mailbox: mchp-ipc-sbi: fix out-of-bounds access in mchp_ipc_get_cluster_aggr_irq()
kernel: mailbox: mchp-ipc-sbi: fix out-of-bounds access in mchp_ipc_get_cluster_aggr_irq()
A flaw was found in the Linux kernel's mailbox subsystem, specifically within the mchp-ipc-sbi component. This vulnerability involves an out-of-bounds access in the `mchp_ipc_get_cluster_aggr_irq()` function. The `cluster_cfg` array, which holds per-CPU configuration structures, was incorrectly indexed using `hartid`, which could exceed the array's bounds. This issue can lead to memory corruption within the kernel.
Package: kernel (Red Hat Enterprise Linux 10) - Not affected
Package: kernel (Red Hat Enterprise Linux 6) - Not affected
Package: kernel (Red Hat Enterprise Linux 7) - Not affected
Package: kernel-rt (Red Hat Enterprise Linux 7) - Not affected
Package: kernel (Red Hat Enterprise Linu
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-43274 kernel: mailbox: mchp-ipc-sbi: fix out-of-bounds access in mchp_ipc_get_cluster_aggr_irq()
bugzilla·2026-05-06
CVE-2026-43274 CVE-2026-43274 kernel: mailbox: mchp-ipc-sbi: fix out-of-bounds access in mchp_ipc_get_cluster_aggr_irq()
CVE-2026-43274 kernel: mailbox: mchp-ipc-sbi: fix out-of-bounds access in mchp_ipc_get_cluster_aggr_irq()
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().
Discussion:
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026050611-CVE-2026-43274-7e15@gregkh/T
Rapid7
Patch Tuesday - May 2026
blogs_rapid7·2026-05-13·CVSS 10.0
CVE-2026-41089 [CRITICAL] Patch Tuesday - May 2026
Microsoft is publishing 137 vulnerabilities on May 2026 Patch Tuesday . Microsoft is not aware of exploitation in the wild or public disclosure for any of these vulnerabilities. So far this month, Microsoft has provided patches to address 133 browser vulnerabilities, which are not included in the Patch Tuesday count above.
## Windows Netlogon: critical RCE
Anyone responsible for securing a domain controller should prioritize remediation of CVE-2026-41089 , which is a critical stack-based buffer overflow in Windows Netlogon with a CVSS v3 base score of 9.8. Exploitation leads to execution in the context of the Netlogon service, so that’s SYSTEM privileges on the domain controller. For most pentesters, that’s the point at which the customer report more or less writes itself. No privileges
2026-05-06
Published