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CVE-2026-93148

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: bpf: Reject MEM_ALLOC BTF accesses past object bounds BTF struct walks relax the struct-size check for accesses through a trail…

Published Sep 17, 2026EPSS 0.18%

Overview

CVE-2026-93148 is a high-severity vulnerability. It was published on September 17, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. 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:

bpf: Reject MEM_ALLOC BTF accesses past object bounds

BTF struct walks relax the struct-size check for accesses through a

trailing flexible array. That is valid for ordinary BTF type walking, but

PTR_TO_BTF_ID | MEM_ALLOC values point to objects allocated with the static

BTF type size.

When walking a MEM_ALLOC object, reject the access before applying the

flexible-array relaxation if the access range extends past the struct size.

Apply the same policy to struct ID matching so kfunc and kptr type checks

do not walk past the allocated object bounds either.

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/90d36e825da4fadeede64784ceda975ab7b31dabRefgit.kernel.org/stable/c/94033c193bc38794511b2ebfa3dc0287d3b2bf60Refgit.kernel.org/stable/c/9c9ee0324c774490ae953162aaaf4561d222bd93Refgit.kernel.org/stable/c/cf08ff2255de98cfcbc8bf7236fbeb38f0d5b4f1Refgit.kernel.org/stable/c/e626a50d07d43421cbf7bfb5a084b33a5e276b6e

How CyberStrike helps

Frequently asked questions

What is CVE-2026-93148?

CVE-2026-93148 is a high-severity vulnerability. It was published on September 17, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-93148?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-93148?

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-2026-93148?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-93148 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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