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CVE-2026-74545

9.8 · CRITICAL

In the Linux kernel, the following vulnerability has been resolved: rtase: fix double free of multi-frag skb on DMA map failure In rtase_start_xmit(), when the head buffer DMA mapping fails after…

Published Aug 15, 2026EPSS 0.67%

Overview

CVE-2026-74545 is a critical-severity vulnerability. It was published on August 15, 2026 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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

rtase: fix double free of multi-frag skb on DMA map failure

In rtase_start_xmit(), when the head buffer DMA mapping fails after

rtase_xmit_frags() has mapped all fragments, the error path clears

the fragment descriptors with rtase_tx_clear_range(), which frees

the skb through the last-frag slot and accounts tx_dropped. Control

then falls through to the common error label, which frees the same

skb a second time and counts it again.

Return right after clearing the fragments when the skb owns frags;

the no-frag case still drops through and frees the head skb once.

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/4f09172aff5f73a5e914f4fbc0d00a1c2ea9f7cbRefgit.kernel.org/stable/c/6fb7b769d6ed6d1d2e02af4a80e57a2477f35086Refgit.kernel.org/stable/c/db986098f30881fafcc752800aa3b13fd289c922Refgit.kernel.org/stable/c/de691dc3227b061c4d0beba9f0128fe1ff33dd68

How CyberStrike helps

Frequently asked questions

What is CVE-2026-74545?

CVE-2026-74545 is a critical-severity vulnerability. It was published on August 15, 2026 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2026-74545?

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-74545?

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-2026-74545?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-74545 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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