Go to homepageCyberStrike

Menu

Star on GitHub · 3.4k
Sign inDownload

CVE-2026-93045

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: bpf: Reject arena frees below the arena base bpf_arena_free_pages() accepts scalar arena addresses.

Published Sep 17, 2026EPSS 0.13%

Overview

CVE-2026-93045 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 arena frees below the arena base

bpf_arena_free_pages() accepts scalar arena addresses. The runtime

masks the address to the low 32 bits and reconstructs a full user

address from the arena base before returning the range to the arena

free tree.

When the scalar value is below the low 32 bits of the arena base,

full_uaddr falls below user_vm_start. The existing upper-end clipping

then turns this into an out-of-range free-tree offset. A later

allocation can reuse that offset and return an address below the arena

mapping.

Reject such frees before computing the clipped range.

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/8a08635656037aee9c12231ed384449c4ffb1a93Refgit.kernel.org/stable/c/90453eaf8f14e7be0ab03983f2a93aeb6b990a58Refgit.kernel.org/stable/c/a968dffa5ab3c74d2ebb3a6233bf8b843f0bfc20Refgit.kernel.org/stable/c/b5a71cb2db6d84ac0042549dcec266b18429d41e

How CyberStrike helps

Frequently asked questions

What is CVE-2026-93045?

CVE-2026-93045 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-2026-93045?

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-2026-93045?

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-2026-93045?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-93045 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 HIGH CVEs from 2026

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999
Watch the demo →