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CVE-2026-43481

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: net-shapers: don't free reply skb after genlmsg_reply() genlmsg_reply() hands the reply skb to netlink, and netlink_unicast() c…

Published May 13, 2026EPSS 0.17%

Overview

CVE-2026-43481 is a high-severity vulnerability. It was published on May 13, 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-shapers: don't free reply skb after genlmsg_reply()

genlmsg_reply() hands the reply skb to netlink, and

netlink_unicast() consumes it on all return paths, whether the

skb is queued successfully or freed on an error path.

net_shaper_nl_get_doit() and net_shaper_nl_cap_get_doit()

currently jump to free_msg after genlmsg_reply() fails and call

nlmsg_free(msg), which can hit the same skb twice.

Return the genlmsg_reply() error directly and keep free_msg

only for pre-reply failures.

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/57885276cc16a2e2b76282c808a4e84cbecb3aaeRefgit.kernel.org/stable/c/83f7b54242d0abbfce35a55c01322f50962ed3eeRefgit.kernel.org/stable/c/8738dcc844fff7d0157ee775230e95df3b1884d7

How CyberStrike helps

Frequently asked questions

What is CVE-2026-43481?

CVE-2026-43481 is a high-severity vulnerability. It was published on May 13, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-43481?

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-2026-43481?

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-2026-43481?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-43481 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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