Riskcovery

CVE-2026-43274

mailbox: mchp-ipc-sbi: fix out-of-bounds access in mchp_ipc_get_cluster_aggr_irq()

State
Published
Severity
8.4 High
Published
May 6, 2026
Updated
Aug 5, 2026
Reserved
May 1, 2026

Read the record on cve.org

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().

Scores

CVSSScoreVectorSource
3.18.4 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HLinux

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • e4b1d67e71419c4af581890ecea84b04920d4116 to before 95438699c92947155823dcd3918049a07f3cd867Affected
  • e4b1d67e71419c4af581890ecea84b04920d4116 to before 0442b6229e2eedc95a6d3d18ce75dec7f5b5377cAffected
  • e4b1d67e71419c4af581890ecea84b04920d4116 to before f7c330a8c83c9b0332fd524097eaf3e69148164dAffected
LinuxLinux
  • 6.14Affected
  • before 6.14Not affected
  • 6.18.16 through 6.18.*Not affected
  • 6.19.6 through 6.19.*Not affected
  • 7.0 and laterNot affected

References

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