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CVE-2026-74736

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: net/sched: cls_bpf: reject dev-bound programs bound to a different device cls_bpf_prog_from_efd() obtained a SCHED_CLS program…

Published Aug 26, 2026EPSS 0.14%

Overview

CVE-2026-74736 is a high-severity vulnerability. It was published on August 26, 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:

net/sched: cls_bpf: reject dev-bound programs bound to a different device

cls_bpf_prog_from_efd() obtained a SCHED_CLS program via

bpf_prog_get_type_dev() but never verified that a device-bound (offloaded)

program's bound netdev matches the TC netdev the classifier is being

attached to. This let a program loaded with prog_ifindex for device A be

attached via cls_bpf + skip_sw to device B; deleting device A then

destroyed the program's offload state while it was still attached to

device B, triggering a netdevsim WARN (panic with panic_on_warn=1).

Mirror the XDP attach path (net/core/dev.c) and reject the attach with

-EINVAL when a dev-bound program's bound device does not match the

target device.

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/120977e2c096deea4e866e4273be9220b957c29eRefgit.kernel.org/stable/c/5685bbbd3cbfbeb0de96a1d275a5ca073dfebb5eRefgit.kernel.org/stable/c/adb3e7c26a51a10d94a241c6de7a81a2863dcacfRefgit.kernel.org/stable/c/daf546ab5763ce6a18280cb4db060e836c515301Refgit.kernel.org/stable/c/ec5a552f4b2d841c6c021752450716e1a9676661

How CyberStrike helps

Frequently asked questions

What is CVE-2026-74736?

CVE-2026-74736 is a high-severity vulnerability. It was published on August 26, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-74736?

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-2026-74736?

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-2026-74736?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-74736 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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