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CVE-2025-21713

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: powerpc/pseries/iommu: Don't unset window if it was never set On pSeries, when user attempts to use the same vfio container use…

Published Feb 27, 2025CWE-476EPSS 0.21%

Overview

CVE-2025-21713 is a medium-severity vulnerability. It was published on February 27, 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:

powerpc/pseries/iommu: Don't unset window if it was never set

On pSeries, when user attempts to use the same vfio container used by

different iommu group, the spapr_tce_set_window() returns -EPERM

and the subsequent cleanup leads to the below crash.

Kernel attempted to read user page (308) - exploit attempt?

BUG: Kernel NULL pointer dereference on read at 0x00000308

Faulting instruction address: 0xc0000000001ce358

Oops: Kernel access of bad area, sig: 11 [#1]

NIP: c0000000001ce358 LR: c0000000001ce05c CTR: c00000000005add0

<snip>

NIP [c0000000001ce358] spapr_tce_unset_window+0x3b8/0x510

LR [c0000000001ce05c] spapr_tce_unset_window+0xbc/0x510

Call Trace:

spapr_tce_unset_window+0xbc/0x510 (unreliable)

tce_iommu_attach_group+0x24c/0x340 [vfio_iommu_spapr_tce]

vfio_container_attach_group+0xec/0x240 [vfio]

vfio_group_fops_unl_ioctl+0x548/0xb00 [vfio]

sys_ioctl+0x754/0x

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/17391cb2613b82f8c405570fea605af3255ff8d2Refgit.kernel.org/stable/c/ac12372a13dab3f7a2762db240bd180de8ef1e5eRefgit.kernel.org/stable/c/b853ff0b514c1df314246fcf94744005914b48cb

How CyberStrike helps

Frequently asked questions

What is CVE-2025-21713?

CVE-2025-21713 is a medium-severity vulnerability. It was published on February 27, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-21713?

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-2025-21713?

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-2025-21713?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-21713 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.

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