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CVE-2026-72489

8.4 · HIGH

In the Linux kernel, the following vulnerability has been resolved: staging: nvec: fix use-after-free in nvec_rx_completed() In nvec_rx_completed(), when an incomplete RX transfer is detected, nv…

Published Aug 15, 2026EPSS 0.19%

Overview

CVE-2026-72489 is a high-severity vulnerability. It was published on August 15, 2026 and has a CVSS 3.1 base score of 8.4 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.4, 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:

staging: nvec: fix use-after-free in nvec_rx_completed()

In nvec_rx_completed(), when an incomplete RX transfer is detected,

nvec_msg_free() is called to return the message back to the pool by

clearing its 'used' atomic flag. Immediately after this, the code

accesses nvec->rx->data[0] to check the message type.

Since nvec_msg_free() marks the pool slot as available via atomic_set(),

any concurrent or subsequent call to nvec_msg_alloc() could claim that

same slot and overwrite its data[] array. Reading nvec->rx->data[0] after

freeing the message is therefore a use-after-free.

Fix this by saving the message type byte before calling nvec_msg_free(),

then using the saved value for the battery quirk check.

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/08626fcfe12308ca3f8b22c538ba7dee0b2dce7aRefgit.kernel.org/stable/c/26813881181deb3a32fbb59eadb2599cbe8423f6Refgit.kernel.org/stable/c/5de04caa46b635e180cecbd164e333eca535db94Refgit.kernel.org/stable/c/6b2ea886ebdae44a2394029844a4e78f58e1587dRefgit.kernel.org/stable/c/9f7fe4165a1f1014bdadc8e744c0fd3c2d8c0b89Refgit.kernel.org/stable/c/a37625c7b688fcf68a54263528eccbabfd7fa17aRefgit.kernel.org/stable/c/bb3d592c7d6c4ec8ac6640c690ca13298e7e8e90Refgit.kernel.org/stable/c/f19a5bc059051143c489dd6f79a0f9c3bfd13aea

How CyberStrike helps

Frequently asked questions

What is CVE-2026-72489?

CVE-2026-72489 is a high-severity vulnerability. It was published on August 15, 2026 and has a CVSS 3.1 base score of 8.4 (HIGH).

How severe is CVE-2026-72489?

This vulnerability has a CVSS 3.1 base score of 8.4, 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-2026-72489?

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-2026-72489?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-72489 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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