Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2025-38055

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: perf/x86/intel: Fix segfault with PEBS-via-PT with sample_freq Currently, using PEBS-via-PT with a sample frequency instead of…

Published Jun 18, 2025CWE-476EPSS 0.19%

Overview

CVE-2025-38055 is a medium-severity vulnerability. It was published on June 18, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

perf/x86/intel: Fix segfault with PEBS-via-PT with sample_freq

Currently, using PEBS-via-PT with a sample frequency instead of a sample

period, causes a segfault. For example:

BUG: kernel NULL pointer dereference, address: 0000000000000195

<NMI>

? __die_body.cold+0x19/0x27

? page_fault_oops+0xca/0x290

? exc_page_fault+0x7e/0x1b0

? asm_exc_page_fault+0x26/0x30

? intel_pmu_pebs_event_update_no_drain+0x40/0x60

? intel_pmu_pebs_event_update_no_drain+0x32/0x60

intel_pmu_drain_pebs_icl+0x333/0x350

handle_pmi_common+0x272/0x3c0

intel_pmu_handle_irq+0x10a/0x2e0

perf_event_nmi_handler+0x2a/0x50

That happens because intel_pmu_pebs_event_update_no_drain() assumes all the

pebs_enabled bits represent counter indexes, which is not always the case.

In this particular case, bits 60 and 61 are set for PEBS-via-PT purposes.

The behaviour of PEBS-via-PT with sample frequency is questi

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/0b1874a5b1173fbcb2185ab828f4c33d067e551eRefgit.kernel.org/stable/c/99bcd91fabada0dbb1d5f0de44532d8008db93c6Refgit.kernel.org/stable/c/ca51db23166767a8445deb8331c9b8d5205d9287

How CyberStrike helps

Frequently asked questions

What is CVE-2025-38055?

CVE-2025-38055 is a medium-severity vulnerability. It was published on June 18, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-38055?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2025-38055?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-38055?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-38055 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

Related MEDIUM CVEs from 2025

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999