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CVE-2026-93260

7.4 · HIGH

In the Linux kernel, the following vulnerability has been resolved: powerpc/xive: propagate IPI init errors to prevent use-after-free When xive_init_ipis() fails (e.g.

Published Sep 24, 2026EPSS 0.14%

Overview

CVE-2026-93260 is a high-severity vulnerability. It was published on September 24, 2026 and has a CVSS 3.1 base score of 7.4 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.4, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

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

powerpc/xive: propagate IPI init errors to prevent use-after-free

When xive_init_ipis() fails (e.g. irq_domain_alloc_irqs() fails),

the error path frees the global xive_ipis array. However,

xive_smp_probe() previously ignored this failure and proceeded to

call xive_setup_cpu_ipi(), which dereferences the already-freed

xive_ipis pointer -- a use-after-free.

Now that xive_smp_probe() returns int (previous patch), propagate

the error from xive_init_ipis() and xive_setup_cpu_ipi() through

xive_smp_probe(). Check the return value in both pnv_smp_probe()

and pSeries_smp_probe() so that IPI setup is aborted cleanly on

failure, avoiding the use-after-free.

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/2ea6238343691309e68308131c7e80c3ae05afeaRefgit.kernel.org/stable/c/411a3c016e7a95f5fa105a0587e07d0647a77727Refgit.kernel.org/stable/c/5c9ab0c9cede9f149733d330e2d7d45341b71359Refgit.kernel.org/stable/c/89e1caa5b0aafe23e9938d9a311e9d41baee583eRefgit.kernel.org/stable/c/c554a8d376d5aea1b237ed6bef6f9fbfc550e67fRefgit.kernel.org/stable/c/e36b1c2eafcaaddefa70d55e6fda74cf6cda38af

How CyberStrike helps

Frequently asked questions

What is CVE-2026-93260?

CVE-2026-93260 is a high-severity vulnerability. It was published on September 24, 2026 and has a CVSS 3.1 base score of 7.4 (HIGH).

How severe is CVE-2026-93260?

This vulnerability has a CVSS 3.1 base score of 7.4, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-93260?

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-2026-93260?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-93260 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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