CVE Catalog

CVE-2026-72236

Low risk· EPSS 12%
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.22%

12th percentile - higher than 12% of all known CVEs

Summary

In the Linux kernel s390/perf_cpum_cf subsystem, a speculation barrier (array_index_nospec) was missing when using the ev variable as an array index. The fix adds a call to array_index_nospec() to prevent speculative execution.

Risk Assessment

Missing speculation barrier could enable Spectre-type attacks, leading to kernel data leakage.

Recommendation

It is recommended to update the Linux kernel to a version containing the fix and implement mitigations against speculative attacks.

Other vulnerabilities in Linux kernel

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Original NVD description (English source)

In the Linux kernel, the following vulnerability has been resolved: s390/perf_cpum_cf: Add missing array_index_nospec() to __hw_perf_event_init() ev variable is userspace controlled via event->attr.config and used as an array index after bounds checking, but without speculation barriers. Add the missing array_index_nospec() call to prevent speculative execution.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS