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CVE-2026-90177

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: bpf: Check pointer type for all atomic RMW paths Atomic RMW verification records an instruction pointer type only when the curr…

Published Sep 17, 2026EPSS 0.16%

Overview

CVE-2026-90177 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: Check pointer type for all atomic RMW paths

Atomic RMW verification records an instruction pointer type only when the

current destination is PTR_TO_ARENA. A second path can therefore reach the

same instruction with an ordinary pointer without comparing it against the

saved arena type.

The post-verification fixup uses the saved type to rewrite the instruction

to BPF_PROBE_ATOMIC for every path. Record the actual destination type for

all atomic RMW paths so the existing mismatch check rejects incompatible

uses of one instruction.

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/4bc49ae344d65cfcef738f281ac575cf73ca2fc5Refgit.kernel.org/stable/c/b14dabe9656c1029abf3aa01e69c0d62f37f2f88Refgit.kernel.org/stable/c/d4ba9d888ac0a8f12c78071fff73e1205a0b9293Refgit.kernel.org/stable/c/eb287c6e81dedef92da01eb947f380d0aae513c3

How CyberStrike helps

Frequently asked questions

What is CVE-2026-90177?

CVE-2026-90177 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-2026-90177?

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-2026-90177?

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-2026-90177?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-90177 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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